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Elastoplastic Model for Soils Considering Structure and Overconsolidation 认领 引用 被引量：3
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作者 ZHANG Shuo LIAO Chencong +1 位作者 ZHANG Qi ZHEN Liang 《Journal of Shanghai Jiaotong university(Science)》 EI 2019年第2期196-203,共8页
An isotropic hardening elastoplastic model for soil is presented, which takes into consideration the influence of structure and overconsolidation on strength and deformation of clays. Based on the superloading concept... An isotropic hardening elastoplastic model for soil is presented, which takes into consideration the influence of structure and overconsolidation on strength and deformation of clays. Based on the superloading concept and subloading concept, the inner structural variable ω and overconsolidation variable ρ are introduced to describe the structure and overconsolidation of soil. The present model requires three additional parameters which can be obtained by conventional triaxial test, and the other parameters are same as those of modified Cam-clay(MCC) model. The performance of the proposed model is verified by undrained and drained triaxial tests. 展开更多
关键词 elastoplastic model clay overconsolidation structure transformed stress
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Research progress on bio-inspired composite structures based on ceramic 3D printing:a review 认领 引用
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作者 Dekun Kong Hailong Wu +4 位作者 Qingquan Zhang Dechao Lyu Yumeng Han Zhihui Zhang Luquan Ren 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2026年第3期430-468,共39页
Ceramic materials demonstrate great application potential in multiple fields such as aerospace and biomedical engineering due to their excellent mechanical properties,high-temperature resistance,and good biocompatibil... Ceramic materials demonstrate great application potential in multiple fields such as aerospace and biomedical engineering due to their excellent mechanical properties,high-temperature resistance,and good biocompatibility,but their inherent brittleness and processing defects urgently need to be broken through.Inspired by the biological structures found in nature,the integration of biomimicry and additive manufacturing(AM)technologies offers a new pathway for the innovative design of high-performance ceramic materials.This article systematically reviews the fundamental principles and classifications of ceramic AM technology,focusing on six typical elements of biomimetic structural design:coaxial composite structures,surface reinforcement structures,layered composite structures,porous structures,composite multicomponent structures,and intelligent bionic structures.The review delves into their biomimetic principles,preparation strategies,performance advantages,and research progress.Research indicates that through multiscale topological design and functional integration,these structures can significantly enhance the mechanical properties and environmental adaptability of ceramics.Nevertheless,current technologies still face numerous challenges in balancing manufacturing precision and efficiency,controlling cracks and residual stresses caused by interface defects,ensuring long-term material stability under extreme environments,enhancing intelligent response capabilities,and guaranteeing process scalability and performance consistency in clinical applications.Future research should integrate multidisciplinary approaches to optimize structural design and dynamic response,transforming biomimetic ceramic materials from‘biological replication'to‘performance exceeding',thereby providing theoretical and technical support for the customized development of high-performance ceramic devices. 展开更多
关键词 bio-inspired composite structures ceramic additive manufacturing coaxial composite structures composite multicomponent structures intelligent bionic structures
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Multi-scale elastoplastic mechanical model and microstructure damage analysis of solid expandable tubular 认领 引用 被引量：1
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作者 Hui-Juan Guo Ying-Hua Liu +2 位作者 Yi-Nao Su Quan-Li Zhang Guo-Dong Zhan 《Chinese Physics B》 SCIE EI CAS CSCD 2020年第10期336-348,共13页
We present an in-depth study of the failure phenomenon of solid expandable tubular (SET) due to large expansion ratio in open holes of deep and ultra-deep wells. By examining the post-expansion SET, lots of microcrack... We present an in-depth study of the failure phenomenon of solid expandable tubular (SET) due to large expansion ratio in open holes of deep and ultra-deep wells. By examining the post-expansion SET, lots of microcracks are found on the inner surface of SET. Their morphology and parameters such as length and depth are investigated by use of metallographic microscope and scanning electron microscope (SEM). In addition, the Voronoi cell technique is adopted to characterize the multi-phase material microstructure of the SET. By using the anisotropic elastoplastic material constitutive model and macro/microscopic multi-dimensional cross-scale coupled boundary conditions, a sophisticated and multi-scale finite element model (FEM) of the SET is built successfully to simulate the material microstructure damage for different expansion ratios. The microcrack initiation and growth is simulated, and the structural integrity of the SET is discussed. It is concluded that this multi-scale finite element modeling method could effectively predict the elastoplastic deformation and the microscopic damage initiation and evolution of the SET. It is of great significance as a theoretical analysis tool to optimize the selection of appropriate tubular materials and it could be also used to substantially reduce costly failures of expandable tubulars in the field. This numerical analysis is not only beneficial for understanding the damage process of tubular materials but also effectively guides the engineering application of the SET technology. 展开更多
关键词 solid expandable tubular(SET) material microstructure damage multi-scale elastoplastic model virtual failure
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Finite Element Simulations on Failure Behaviors of Granular Materials with Microstructures Using a Micromechanics-Based Cosserat Elastoplastic Model 认领 引用 被引量：1
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作者 Chenxi Xiu Xihua Chu 《Computer Modeling in Engineering & Sciences》 SCIE EI 2024年第3期2305-2338,共34页
This paper presents a micromechanics-based Cosserat continuum model for microstructured granular materials.By utilizing this model,the macroscopic constitutive parameters of granular materials with different microstru... This paper presents a micromechanics-based Cosserat continuum model for microstructured granular materials.By utilizing this model,the macroscopic constitutive parameters of granular materials with different microstructures are expressed as sums of microstructural information.The microstructures under consideration can be classified into three categories:a medium-dense microstructure,a dense microstructure consisting of one-sized particles,and a dense microstructure consisting of two-sized particles.Subsequently,the Cosserat elastoplastic model,along with its finite element formulation,is derived using the extended Drucker-Prager yield criteria.To investigate failure behaviors,numerical simulations of granular materials with different microstructures are conducted using the ABAQUS User Element(UEL)interface.It demonstrates the capacity of the proposed model to simulate the phenomena of strain-softening and strain localization.The study investigates the influence of microscopic parameters,including contact stiffness parameters and characteristic length,on the failure behaviors of granularmaterials withmicrostructures.Additionally,the study examines themesh independence of the presented model and establishes its relationship with the characteristic length.A comparison is made between finite element simulations and discrete element simulations for a medium-dense microstructure,revealing a good agreement in results during the elastic stage.Somemacroscopic parameters describing plasticity are shown to be partially related to microscopic factors such as confining pressure and size of the representative volume element. 展开更多
关键词 Granular materials micromechanics Cosserat elastoplastic model microstructures failure behaviors
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GPU-accelerated vector-form particle-element method for 3D elastoplastic contact of structures 认领 引用 被引量：1
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作者 Wei WANG Yanfeng ZHENG +2 位作者 Jingzhe TANG Chao YANG Yaozhi LUO 《Journal of Zhejiang University-SCIENCE A》 SCIE EI CAS CSCD 2023年第12期1120-1130,共11页
A graphics processing unit(GPU)-accelerated vector-form particle-element method,i.e.,the finite particle method(FPM),is proposed for 3D elastoplastic contact of structures involving strong nonlinearities and computati... A graphics processing unit(GPU)-accelerated vector-form particle-element method,i.e.,the finite particle method(FPM),is proposed for 3D elastoplastic contact of structures involving strong nonlinearities and computationally expensive contact calculations.A hexahedral FPM element with reduced integration and anti-hourglass is developed to model structural elastoplastic behaviors.The 3D space containing contact surfaces is decomposed into cubic cells and the contact search is performed between adjacent cells to improve search efficiency.A connected list data structure is used for storing contact particles to facilitate the parallel contact search procedure.The contact constraints are enforced by explicitly applying normal and tangential contact forces to the contact particles.The proposed method is fully accelerated by GPU-based parallel computing.After verification,the performance of the proposed method is compared with the serial finite element code Abaqus/Explicit by testing two large-scale contact examples.The maximum speedup of the proposed method over Abaqus/Explicit is approximately 80 for the overall computation and 340 for contact calculations.Therefore,the proposed method is shown to be effective and efficient. 展开更多
关键词 Graphics processing unit(GPU) Parallel acceleration Elastoplastic contact Contact search Finite particle method(FPM)
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A novel Angle-Constrained Optimization method of Conformal Lattice Structures 认领 引用 被引量：1
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作者 Jun Yan Weibin Xu +2 位作者 Fuhao Wang Sixu Huo Kun Yan 《Computer Modeling in Engineering & Sciences》 SCIE EI 2026年第2期269-295,共27页
Conformal truss-like lattice structures face significant manufacturability challenges in additive manufac-turing due to overhang angle limitations.To address this problem,we propose a novel angle-constrained optimizat... Conformal truss-like lattice structures face significant manufacturability challenges in additive manufac-turing due to overhang angle limitations.To address this problem,we propose a novel angle-constrained optimization method grounded in the global adjustment of nodal coordinates.First,a build direction is selected to minimize the number of violating struts.Then,an angular-constraint matrix is assembled from strut direction vectors,and analytical sensitivities with respect to nodal coordinates are derived to enable efficient constrained optimization under nonlinear angular inequality constraints.Numerical studies on two complex curved-surface lattices demonstrate that all overhang violations are eliminated while only minor changes are induced in global stiffness and strength.In particular,the maximum displacement of an ergonomic insole varies by only 2.87%after optimization.The results confirm the method’s versatility and engineering robustness,providing a practical approach for additive manufacturing-oriented lattice structure design. 展开更多
关键词 Conformal lattice structures additive manufacturing structural optimization complex structures
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Continuum modeling for layer jamming structures 认领 引用
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作者 Shuai Zhang Jiantao Yao +1 位作者 Shizeng Li Xinbo Chen 《Theoretical & Applied Mechanics Letters》 EI CAS CSCD 2026年第1期77-85,共9页
Layer jamming structures(LJS)are a class of variable stiffness structures that are valuable for adaptive and soft robotic systems.However,existing models for LJS often rely on discrete approximations or are tailored t... Layer jamming structures(LJS)are a class of variable stiffness structures that are valuable for adaptive and soft robotic systems.However,existing models for LJS often rely on discrete approximations or are tailored to specific configurations,limiting their generalizability and computational efficiency.In this study,we propose a contin-uum elastoplastic constitutive model for LJS based on the average-field technique.The model captures both the jamming(no interlayer slipping)and slipping states of LJS,enabling analytical expressions for yield criteria,and dissipated energy density.Finite element simulations in Abaqus incorporating periodic boundary conditions were conducted to validate the theoretical model under various deformation scenarios,including uniaxial shear,multi-directional shear,and coupled shear-normal loading.The results demonstrate strong agreement between numerical and theoretical predictions,effectively capturing the nonlinear transitions in stiffness and energy evo-lution.This continuum framework offers a unified,scalable tool for modeling the mechanical behavior of LJS and supports the design and optimization of stiffness-tunable systems in soft robotics and beyond. 展开更多
关键词 Layer jamming structure Continuum modeling Elastoplastic constitutive
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Analytical solution of Mises elastoplastic solid spherical cavity expansion model considering initial hole and elastoplastic continuity 认领 引用
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作者 Yiding Wu Guangfa Gao 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2026年第4期327-343,共17页
The cavity expansion model(CEM)holds significant engineering value for high-speed impact and blast analysis,yet its theoretical development suffers from three critical limitations:failure to quantify the influence of ... The cavity expansion model(CEM)holds significant engineering value for high-speed impact and blast analysis,yet its theoretical development suffers from three critical limitations:failure to quantify the influence of elastic strain accumulation on initial cavity size,solution discontinuity caused by conceptual confusion between elastic/plastic compressibility,and inadequate applicability of traditional solutions to non-zero initial cavity conditions.This study establishes a unified theoretical framework within the Eulerian framework based on the quasi-static spherical CEM,simultaneously considering both compressibility and incompressibility during the plastic phase.By introducing initial cavity size and elastic pre-strain,we derived a general analytical solution enabling continuous elastic-plastic transition,supported by numerical validation.The results demonstrate that incorporating both elastic compressibility and initial cavity size under plastic incompressibility assumptions yields continuous analytical solutions.For cavity wall pressure evolution,the improved theory shows closer alignment with numerical solutions in pre-critical pressure regimes,accurately captures momentum conservation characteristics under highpressure conditions,and resolves longstanding ambiguities in volumetric compressibility concepts. 展开更多
关键词 Spherical cavity expansion theory Mises elastoplasticity Elastoplastic mechanics Penetration mechanics
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Acoustic Absorption Properties of Bio-inspired Stochastic Voronoi Porous Structures 认领 引用
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作者 Wenjiong Chen Hanbin Wang +1 位作者 Zhiqi Li Shutian Liu 《Journal of Bionic Engineering》 SCIE EI CSCD 2026年第3期1736-1750,共15页
Voronoi structures are widely present in nature,and highly ordered Voronoi structures such as honeycomb structures have gained extensive recognition and in-depth research in the field of sound absorption structure des... Voronoi structures are widely present in nature,and highly ordered Voronoi structures such as honeycomb structures have gained extensive recognition and in-depth research in the field of sound absorption structure design.However,Voronoi structures in biological tissues are not all highly ordered.Stochastic Voronoi structures are equally prevalent and exhibit excellent multifunctional properties.To further explore the acoustic value of stochastic Voronoi structures,this study proposes a Voronoi sound absorbing porous structure that features both structural stochasticity and performance robustness.First,a theoretical calculation model is established based on microperforated panel theory and Helmholtz resonance theory,enabling the rapid calculation of the structure’s sound absorption coefficient.Then,a systematic analysis is conducted on the effective conditions for absorption performance robustness from four dimensions:unit number,structural randomness,manufacturing errors,and boundary cutting.Results indicate that there exists a unit number threshold associated with absorption bandwidth in the Voronoi structure.When this threshold is exceeded,the structure can exhibit favorable sound absorption robustness against structural stochasticity,manufacturing errors,and boundary cutting.Experimental verification shows that under significant boundary changes,the structure still maintains an average sound absorption coefficient of approximately 0.8 within an absorption bandwidth of approximately 400 Hz.Its favorable low-frequency broadband sound absorption performance and robustness endow it with promising application prospects in engineering fields where cost control,environmental adaptability,and construction efficiency need to be balanced. 展开更多
关键词 Sound absorption structure Voronoi Structural stochasticity Performance robustness Porous structure
Low-frequency signal inversion and reconstruction via the spatial structure regularization 认领 引用
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作者 Wei-wei Gu Hao Li +2 位作者 Dong-feng Zhao Peng-fei Wang Guo-fa Li 《Applied Geophysics》 SCIE CSCD 2026年第1期125-137,429,共13页
Low-frequency signals play a crucial role in seismic inversion of thin-layer structure and reservoir prediction.However,during seismic exploration,the low-frequency signals are often contaminated,distorted,or even mis... Low-frequency signals play a crucial role in seismic inversion of thin-layer structure and reservoir prediction.However,during seismic exploration,the low-frequency signals are often contaminated,distorted,or even missing due to acquisition limitations,processing artifacts,and ambient noise.Although compressive sensing theory-based sparse inversion can partially recover low-frequency signals,the reconstruction results suffer from significant non-uniqueness.To address this challenge,we propose a sparse inversion approach incorporating spatial structural regularization to enhance low-frequency signal recovery.Due to the interference among seismic waveforms,spatial reflection structure exhibits frequency dependency.Consequently,the spatial structure estimated directly from seismic data differs significantly from the actual low-frequency spatial structure.Therefore,the proposed method estimates spatial reflection structure from seismic data in the neighboring frequency band of the low-frequency signals to be recovered,aiming to reduce the impact of frequency dependency on estimation accuracy.Subsequently,both the sparse structure of reflection coefcients and spatial structure of low-frequency signals are incorporated as regularization terms into the inversion framework,enabling geologically guided recovery of low-frequency components.The proposed method was successfully applied in the Tarim Oileld,eectively restoring low-frequency signals and providing reliable foundational seismic data for reservoir prediction. 展开更多
关键词 Spatial structure Structure tensor Low-frequency signals Sparse inversion
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Multi-objective topology optimization for cutout design in deployable composite thin-walled structures 认领 引用
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作者 Hao JIN Ning AN +3 位作者 Qilong JIA Chun SHAO Xiaofei MA Jinxiong ZHOU 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第1期674-694,共21页
Deployable Composite Thin-Walled Structures(DCTWS)are widely used in space applications due to their ability to compactly fold and self-deploy in orbit,enabled by cutouts.Cutout design is crucial for balancing structu... Deployable Composite Thin-Walled Structures(DCTWS)are widely used in space applications due to their ability to compactly fold and self-deploy in orbit,enabled by cutouts.Cutout design is crucial for balancing structural rigidity and flexibility,ensuring material integrity during large deformations,and providing adequate load-bearing capacity and stability once deployed.Most research has focused on optimizing cutout size and shape,while topology optimization offers a broader design space.However,the anisotropic properties of woven composite laminates,complex failure criteria,and multi-performance optimization needs have limited the exploration of topology optimization in this field.This work derives the sensitivities of bending stiffness,critical buckling load,and the failure index of woven composite materials with respect to element density,and formulates both single-objective and multi-objective topology optimization models using a linear weighted aggregation approach.The developed method was integrated with the commercial finite element software ABAQUS via a Python script,allowing efficient application to cutout design in various DCTWS configurations to maximize bending stiffness and critical buckling load under material failure constraints.Optimization of a classical tubular hinge resulted in improvements of 107.7%in bending stiffness and 420.5%in critical buckling load compared to level-set topology optimization results reported in the literature,validating the effectiveness of the approach.To facilitate future research and encourage the broader adoption of topology optimization techniques in DCTWS design,the source code for this work is made publicly available via a Git Hub link:http://gffzz188fe103f8f1460asqocnv6cfx5pn6095.ffgz.tsg.suse.edu.cn/jinhao-ok1/Topo-for-DCTWS.git. 展开更多
关键词 Composite laminates Deployable structures Multi-objective optimization Thin-walled structures Topology optimization
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Energy absorption characteristics of additively manufactured sea sponge-inspired lattice structures under low-velocity impact loading 认领 引用
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作者 J Jefferson Andrew Jabir Ubaid +4 位作者 Mohammed Ayaz Uddin Omar Waqas Saadi Kamran Ahmed Khan Rehan Umer Andreas Schiffer 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2026年第1期118-129,共12页
Low-velocity impact tests are carried out to explore the energy absorption characteristics of bio-inspired lattices,mimicking the architecture of the marine sponge organism Euplectella aspergillum.These sea sponge-ins... Low-velocity impact tests are carried out to explore the energy absorption characteristics of bio-inspired lattices,mimicking the architecture of the marine sponge organism Euplectella aspergillum.These sea sponge-inspired lattice structures feature a square-grid 2D lattice with double diagonal bracings and are additively manufactured via digital light processing(DLP).The collapse strength and energy absorption capacity of sea sponge lattice structures are evaluated under various impact conditions and are compared to those of their constituent square-grid and double diagonal lattices.This study demonstrates that sea sponge lattices can achieve an 11-fold increase in energy absorption compared to the square-grid lattice,due to the stabilizing effect of the double diagonal bracings prompting the structure to collapse layer-bylayer under impact.By adjusting the thickness ratio in the sea sponge lattice,up to 76.7%increment in energy absorption is attained.It is also shown that sea-sponge lattices outperform well-established energy-absorbing materials of equal weight,such as hexagonal honeycombs,confirming their significant potential for impact mitigation.Additionally,this research highlights the enhancements in energy absorption achieved by adding a small amount(0.015 phr)of Multi-Walled Carbon Nanotubes(MWCNTs)to the photocurable resin,thus unlocking new possibilities for the design of innovative lightweight structures with multifunctional attributes. 展开更多
关键词 Sea sponge-inspired lattice structures Additive manufacturing Energy absorption Low-velocity impact Lattice structure Nanocomposite
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Machine Learning Prediction of Crystal Structure Stability toward the Design of High-Entropy Oxides 认领 引用
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作者 Qiancheng Zhou Chunchun Wang +4 位作者 Liyuan Wang Zhouzhou Wang Ming Qiu Mingdong Dong Ying Yu 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第5期314-347,共34页
Energy above the convex hull(Ehull)is a key thermodynamic criterion for assessing phase stability.However,the enormous computational cost required for phase diagram construction hinders the prediction of Ehull,undersc... Energy above the convex hull(Ehull)is a key thermodynamic criterion for assessing phase stability.However,the enormous computational cost required for phase diagram construction hinders the prediction of Ehull,underscoring the need for data-driven approaches.Here,a hybrid framework integrating an autoencoder with a random forest classifier was proposed to effectively categorize crystal structures into stable,metastable,and unstable regimes according to Ehull thresholds,achieving an overall accuracy above 84%.More importantly,physically interpretable latent features associated with density,symmetry,and lattice were identified for stability prediction.Application to high-entropy oxides(HEOs)further demonstrates the effectiveness of the framework,revealing that structures with high configurational entropies and low cation radius mismatch are overwhelmingly classified as stable or metastable.Beyond confirming the dominant role of density and lattice features in stability prediction,SHAP analysis further suggests that larger disparities in atomic thermal conductivities and the regulation of the magnetic moment by limited magnetic atoms play a critical role in governing the stability of HEO structures.The interpretable and effective AE-RF algorithm developed in this work holds great potential for accelerating the discovery of novel HEOs and multicomponent materials. 展开更多
关键词 high entropy oxides random forest classifier crystal structure stability convex hull hybrid framework machine learning crystal structures phase diagram construction
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Realization of Polytype Heterostructures via Delicate Structural Transitions from a Doped Mott Insulator 认领 引用
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作者 Yanyan Geng Manyu Wang +9 位作者 Shumin Meng Shuo Mi Chang Li Huiji Hu Jianfeng Guo Rui Xu Fei Pang Wei Ji Weichang Zhou Zhihai Cheng 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第3期118-135,共18页
Transition-metal dichalcogenides hosting multiple competing structural and electronic phases are thus ideal platforms for constructing polytype heterostructures with emergent quantum properties.However,controlling pha... Transition-metal dichalcogenides hosting multiple competing structural and electronic phases are thus ideal platforms for constructing polytype heterostructures with emergent quantum properties.However,controlling phase transitions to form diverse heterostructures inside a single crystal remains challenging.In this study,we realize vertical/lateral polytype heterostructures in a hole-doped Mott insulator via thermal annealing-induced structural transitions.Raman spectroscopy,atomic force microscopy and scanning Kelvin probe force microscopy confirm the coexistence of T-H polytype heterostructures.Atomic-scale scanning tunneling microscopy/spectroscopy measurements reveal the transparent effect in 1H/1T vertical heterostructures,where positive bias voltage induces in a pronounced superposition of the√13×√13 CDW of the 1T-layer on the 1H-layer.By systematically comparing the 1T/1H and 1T/1T interfaces,we demonstrate that the metallic 1H-layer induces a Coulomb screening effect on the 1T-layer,suppressing the formation of CDW domain walls and forming more ordered electronic states.These results clarify the interfacial coupling between distinct quantum many-body phases and establish a controllable pathway for constructing two-dimensional polytype heterostructures with tunable electronic properties. 展开更多
关键词 Raman spectroscopy polytype heterostructures structural electronic phases spectroscopyatomic force microscopy thermal annealing structural transitions emergent quantum propertieshowevercontrolling phase transitions constructing polytype heterostructures
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Numerical Study on the Wave Loads of the Semi-Submersible Structure Exerted by a Solitary Wave 认领 引用
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作者 LIN Jin-bo LIU Yang +2 位作者 ZHOU Zhong-bing MAO Hong-fei WU Guang-lin 《China Ocean Engineering》 SCIE EI CSCD 2026年第3期713-723,共11页
Wave loads are a critical factor influencing the safety of semi-submersible offshore platforms(SSOPs).However,research on wave loads acting on semi-submerged structures remains limited due to complex large-amplitude m... Wave loads are a critical factor influencing the safety of semi-submersible offshore platforms(SSOPs).However,research on wave loads acting on semi-submerged structures remains limited due to complex large-amplitude motions,such as green water and wave breaking.To investigate the wave loads on an SSOP induced by a solitary wave,a meshless numerical model is developed by integrating the smoothed particle hydrodynamics(SPH)method,artificial viscosity,and Rayleigh theory.The model’s accuracy is validated by comparing simulated wave heights and wave loads against experimental data and exact analytical solutions.The maximum absolute error in the wave height peak is 0.037,corresponding to a relative error of 7.4%,while the maximum relative error in wave loads is 54%(absolute error:0.37 N).Although the relative error in the wave loads appears large,primarily due to the small magnitude of the measured loads,the numerical results remain in good agreement with both the experimental data and the exact solutions.Flow velocities around the structure increase with higher wave heights,exceeding 2 m/s when wave heights surpass 0.2 m,owing to complex wave dynamics.Distinct vortices form both upstream and downstream of the structure,intensifying with increasing wave height.The peak magnitudes of horizontal forces(both positive and negative)decrease with greater water depth,whereas vertical forces increase.Notably,the wave load amplitude(WLA)in the z-direction significantly exceeds that in the x-direction,reaching a maximum value of 0.799. 展开更多
关键词 wave-structure interaction semi-submersible structures extreme waves wave loads
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Germinal Center–Like Tertiary Lymphoid Structures Mark Immune Responsiveness and Enable Checkpoint Immunotherapy in Bladder Cancer 认领 引用
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作者 Zhihao Yin Xi Zhen +13 位作者 Haonan Li Haiqiang Duan Xiaowei Hu Tianxi Yu Qing Shi Ziyi Liu Yaowei Li Peng Zhang Peng Dai Meihui Zhao Ziqi Wang Changfu Li Di Wang Zhichao Tong 《Oncology Research》 SCIE 2026年第7期595-624,共30页
Backgrounds:Tertiary lymphoid structures(TLSs)are increasingly recognized as modulators of anti-tumor immunity,yet their clinical relevance in bladder cancer remains incompletely understood,partly owing to heterogenei... Backgrounds:Tertiary lymphoid structures(TLSs)are increasingly recognized as modulators of anti-tumor immunity,yet their clinical relevance in bladder cancer remains incompletely understood,partly owing to heterogeneity in their maturation states.Here,we demonstrate that germinal center(GC)–like TLS maturity,rather than TLS presence alone,is closely associated with immune activation and therapeutic response to Programmed Death-Ligand 1(PD-L1)blockade in bladder cancer.The objective of this study was to systematically investigate the clinical significance,biological function,and therapeutic potential of tertiary lymphoid structure(TLS)maturation in bladder cancer.Specifically,we aimed to determine whether GC-like TLS maturity provides prognostic and predictive value beyond TLS presence alone,to elucidate the immune programs and tumor microenvironment remodeling associated with TLS maturation,and to explore whether TLS maturation can be therapeutically induced to enhance responsiveness to PD-L1 blockade.Methods:We performed an integrative analysis combining multi-cohort transcriptomics,spatially resolved histopathology,single-cell RNA sequencing,and functional murine experiments.TLS maturation states were defined using gene-expression–based GC-like TLS signatures and validated through multiplex immunohistochemistry.Clinical relevance was assessed in public immunotherapy cohorts and an independent neoadjuvant PD-L1–treated muscle-invasive bladder cancer(MIBC)cohort.Tumor immune microenvironment remodeling and chemokine-mediated cellular crosstalk were analyzed using deconvolution,Weighted Gene Co-expression Network Analysis(WGCNA),and CellChat.The therapeutic inducibility of TLS maturation was examined using a lymphotoxin-βreceptor(LTβR)agonist in combination with PD-L1 blockade in a syngeneic bladder cancer model.Results:Across multiple transcriptomic cohorts,tumors enriched for GC-like TLS signatures exhibited significantly prolonged survival and higher objective response rates to anti–PD-L1 therapy,whereas less mature TLS phenotypes showed no consistent association with clinical association.These observations were independently validated in a neoadjuvant PD-L1–treated muscle-invasive bladder cancer cohort,in which high mature TLS density was associated with major pathological response and prolonged event-free survival,outperforming PD-L1 expression.Integrative histopathological and transcriptomic analyses indicated that GC formation marks a functional transition linking humoral immune programs with cytotoxic effector activity and shaping a memory-prone,pro-inflammatory tumor immune microenvironment.Chemokine signaling via the CC chemokine ligand 21(CCL21)–C-C chemokine receptor type 7(CCR7)and C-X-C motif chemokine ligand 12(CXCL12)–C-X-C chemokine receptor type 4(CXCR4)axes was strongly associated with TLS maturation and spatial organization.Finally,in a syngeneic bladder cancer model,pharmacological activation of lymphotoxin-βreceptor signaling promoted TLS maturation and enhanced the antitumor efficacy of PD-L1 blockade.Conclusions:Together,these findings suggest that GC-like TLS maturity represents a clinically relevant biomarker and a potential therapeutic entry point for precision immunotherapy in bladder cancer.Therapeutic strategies that promote TLS maturation may convert immune-cold tumors into checkpoint-responsive states,providing a mechanistically grounded precision immunotherapy approach. 展开更多
关键词 Tertiary lymphoid structures bladder cancer germinal center(GC)–like tertiary lymphoid structure tumor microenvironment programmed death-ligand 1
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Gradient structured nanocrystalline-amorphous Fe-based composite coatings with superior strength and wear resistance 认领 引用
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作者 Guoliang Ma Hongzhi Cui +4 位作者 Qing Du Xiaojie Song Hao Zhang Hongwei Zhang Hao Chen 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2026年第1期144-155,共12页
Gradient nanocrystalline–amorphous nanostructures are considered to be an effective approach to achieve exceptional strength–plasticity synergy,with significantly improved wear performance.Here,gradient nanostructur... Gradient nanocrystalline–amorphous nanostructures are considered to be an effective approach to achieve exceptional strength–plasticity synergy,with significantly improved wear performance.Here,gradient nanostructured Fe-based coatings were successfully fabricated by extremely high-speed-rate laser deposition and remelting.The microstructure evolution along the depth direction varies in a nanocrystalline,equiaxial dendrites,columnar dendrites gradient,respectively.Noticeably,amorphous grain boundaries and carbide nanoprecipitates could be identified within the topmost surface nanocrystalline layer owing to the extremely high cooling rate during remelting,which exhibits the highest hardness and wear resisance(microhardness of ~1136 HV,and wear rate of 4.36×10−6mm3/(m N)).The superior wear resistance is mainly attributed to the synergistic nanocrystalline–amorphous deformation and gradient refinement effects.Meanwhile,multi-scale carbides effectively impede dislocation motion and further improve strength and wear resistance at different depths.This gradient structure provides promising insights into the design of high-performance wear-resistant alloys. 展开更多
关键词 Gradient nanostructure Nanocrystalline-amorphous structure Extremely high-speed-rate laser remelting Wear resistance
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Three-dimensional fluid-structure-acoustic method for aeroelastic flutter analysis of coupled composite panel and cavity system in supersonic flow 认领 引用
18
作者 Hao Liu Yegao Qu Guang Meng 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2026年第5期673-685,共13页
The paper develops a partitioned three-dimensional fluid-structure-acoustic method to predict the flutter behaviors of a composite panel with a cavity beneath it in supersonic airflow.A higher-order shear deformation ... The paper develops a partitioned three-dimensional fluid-structure-acoustic method to predict the flutter behaviors of a composite panel with a cavity beneath it in supersonic airflow.A higher-order shear deformation theory is employed for laminated panel modeling,considering zigzag effect,and panel's large deformation is accounted for by incorporating nonlinear von Kármán strains.The supersonic airflow is formulated by the unsteady Navier-Stokes equations within the arbitrary Lagrangian-Eulerian framework,which are solved by a finite volume method.Additionally,the sound waves considering finite-amplitude effects,are calculated using a nonlinear finite element method.An implicit partitioned coupling method is used to establish the strong coupling between the unsteady supersonic airflow,composite panel with large deformation,and nonlinear sound waves,which is confirmed through a monolithic fluid-structure-acoustic coupling method.It is revealed that the composite panel-cavity aeroelastic system exhibits a special flutter induced by acoustic resonance,underscoring the crucial role of acoustic-elastic coupling in nonlinear aeroelastic responses.The impact of instability coefficients on flutter dynamics,as derived from linear modal analysis,is discussed,emphasizing that long-time scales are required for the establishment of acoustic resonance within the cavity.The findings suggest that flutter induced by acoustic resonance leads to an acoustic environment with high sound pressure levels in the cavity,particularly in shallow cavities,which could potentially cause detrimental acoustic fatigue of the structure. 展开更多
关键词 Fluid-structure-acoustic interaction Nonlinear aeroelasticity Composite structure Acoustic resonance
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Revealing the dominant influenceof joints:Soil-structurecomponent-joint adaptivity for prefabricated underground structures 认领 引用
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作者 Tong Qiu Kaibin Ye +3 位作者 Xiangsheng Chen Tianjun Wu Wei Rao Xiaohua Bao 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第7期5468-5488,共21页
Compared to the traditional cast-in-situ technique,the novel prefabricated underground structure(PUS)employs machinery excavation and assembly.Notably,the PUS assembly system undergoes multi-level force transmission t... Compared to the traditional cast-in-situ technique,the novel prefabricated underground structure(PUS)employs machinery excavation and assembly.Notably,the PUS assembly system undergoes multi-level force transmission through soil,structure,component,and joint interactions.This transmission mechanism remains inadequately understood,consequently posing frequent instability risks during PUS construction.Hereby,this study foremost addresses this problem for multi-level information modeling and planning for PUS under joint principal control.Three modules of numerical modeling,design theory and adaptive planning were constructed and integrated into the Soil-structure-component-joint Adaptive Planning Model(SAPM).Through a real-project application of SAPM,key insights are as follows:(1)SAPM achieves multi-level information adaptivity by planning the joint properties,which mitigates the soil-structure interaction effect of main and secondary structures by 18% and 63%,respectively.(2)Different joints and components may not achieve optimum solutions with uniform joint properties.Top,bottom and midslab joints achieve multi-level information adaptivity only when their respective joint stiffness factors are 0.90,0.61 and 0.65.(3)The use of semi-rigid joints in PUS has multiple advantages over the common cast-in-situ rigid joints.The semi-rigid scheme reduces ring assembly time and cost by approximately 40%and 20%,respectively,compared to hinged and rigid joint schemes.The research results provide a theoretical and instrumental basis for the safe construction of PUS in complex urban and geotechnical environments. 展开更多
关键词 Prefabricated underground structures Soil-structure-component-joint adaptivity Multi-level information planning Automatic modeling Semi-rigid joint
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Potassium storage in 2D layered TMD anode:Unraveling structure-performance correlations via rational microstructure design 认领 引用
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作者 Lina Ge Yongpeng Cui +10 位作者 Zhijian Qiu Yuting Wang Chong Xu Xiuli Gao Pengyun Liu Xuejin Li Wen Li Qingzhong Xue Yajun Wang Yongfeng Li Wei Xing 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第6期254-276,I0008,共23页
Two-dimensional(2D)layered transition metal dichalcogenide(TMD)materials are promising hosts for potassium-ion storage,as their unique interlayer structures can well accommodate large-sized K+.However,their inherent d... Two-dimensional(2D)layered transition metal dichalcogenide(TMD)materials are promising hosts for potassium-ion storage,as their unique interlayer structures can well accommodate large-sized K+.However,their inherent drawbacks,including poor electrical conductivity,easy self-aggregation,and severe volumetric strain after intensive potassiation,often lead to inferior rate performance and rapid capacity decay that hinder their practical application.To address these critical challenges,numerous structural design strategies have been developed,such as dimensional regulation,layer structure design,defect engineering,and heterogeneous composite construction.Nevertheless,a systematic summary linking microstructure optimization,potassium storage mechanisms,and structure-performance relationships is still lacking.This review aims to fill this gap by overviewing advances in TMD-based anodes,clarifying intrinsic potassium storage mechanisms(intercalation-conversion),and emphasizing structureperformance correlation for rational design.Furthermore,specific future research directions are proposed,including integrated interface engineering,optimized layer structure design,and construction of novel heterostructures.This review is anticipated to enhance the recognition of 2D layered TMD potassium storage and promote the advancement of potassium-ion battery technology. 展开更多
关键词 Transition metal dichalcogenide Potassium ion battery Layer structure Microstructure design Potassium storage mechanism
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