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Evaluation of UHMWPE prepreg laminates under near simultaneous multiple projectile impacts:Effects of structural shapes and projectile dispersions 认领 引用
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作者 Ying Zhou Tao Wang +2 位作者 Wei Zhu Xiaobing Bian Guangyan Huang 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2026年第4期271-293,共23页
Multiple projectile impacts are significant threats in real-world military and anti-terrorism operations.Previous researches have mainly focused on the protection mechanism and structure design against a single projec... Multiple projectile impacts are significant threats in real-world military and anti-terrorism operations.Previous researches have mainly focused on the protection mechanism and structure design against a single projectile impact.However,these conclusions cannot be well applied to the scenario of multiple projectile impacts.Furthermore,flexible low-stiffness materials can adapt to protected targets with diverse geometric profiles more quickly than hard high-stiffness materials.Therefore,this study aims to investigate the flexible UHMWPE prepreg laminates with different shapes under different projectile dispersions from response characteristics,ballistic limit velocity,energy absorption mechanism,and residual velocity.The competition of multiple projectiles against limited protective materials would reduce the ballistic limit velocity.The ballistic tests show that the residual velocities of the three-projectile impacting the conventional planar UHMWPE are higher than those of the single-projectile when the impact velocities are slightly above the ballistic limit velocity.Still,the difference will disappear with the increase of the impact velocity.To reduce the negative influence of the synergistic effect of multiple projectile impacts on protective efficiency,a bio-inspired corrugated structure formed by pre-folding is proposed.The finite element numerical model validated by ballistic experiment results is used for full-scale simulations.Compared with the conventional planar UHMWPE with identical apparent surface density,the ballistic limit velocity of a corrugated structure corresponding to the projectile dispersion of 1,2,and 3 can be increased by 21%–36%.Corrugated prepreg laminates exhibit superior followability and load-bearing capacity.They reserve materials in advance for rapid extensions and alleviate the high in-plane stress of the synergistic effect,which has great potential to protect against multiple projectiles. 展开更多
关键词 Multiple projectile impacts UHMWPE prepreg laminates Bio-inspired structures Dynamic response Ballistic performance
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Theoretical prediction,simulation and test validation of ultimate turning radius for prepregs in variable angle placement 认领 引用
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作者 Xianzhao XIA Lei ZU +7 位作者 Guiming ZHANG Helin PAN Qian ZHANG Jianhui FU Qiaoguo WU Lichuan ZHOU Zhihai BI Honghao LIU 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第1期570-583,共14页
The planar force model of prepreg,initially established based on the principle of minimum potential energy and the Rayleigh-Ritz method,was improved by considering the difference between the tensile and compressive mo... The planar force model of prepreg,initially established based on the principle of minimum potential energy and the Rayleigh-Ritz method,was improved by considering the difference between the tensile and compressive moduli in the direction of the prepreg fibers.Compressivetensile stress distribution coefficients were also established.Combined with tests on the effect of process parameters on interlayer tack,a theoretical prediction model for the turning radius related to process parameters was developed,and the impact of prepreg interlayer tack force on the minimum turning radius was analyzed.A finite element simulation model for prepreg curve placement was created to study the size and distribution patterns of folds generated during the prepreg turning process.A minimum turning radius test was conducted to establish evaluation criteria for surface defects in curve placement and verify the accuracy of the minimum turning radius prediction model.Based on this,a prediction method for the minimum turning radius of prepreg related to process parameters was established,providing constraints for the trajectory design of variable-stiffness placement composites. 展开更多
关键词 Automated fiber placement Prediction model Thermoset prepreg tow Turning radius Wrinkle formation
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Cure Kinetics of Carbon Fiber/Bismaleimide Prepreg 认领 引用 被引量：5
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作者 Guo Zhansheng Du Shanyi +2 位作者 Zhang Boming Zhang Baoyan Chen Xiangbao 《Chinese Journal of Chemical Physics》 SCIE CAS 北大核心 2004年第2期219-224,共6页
A new isothermally based cure kinetic model for the prepreg was presented using an industrially supplied prepreg rather than neat resin.The matrix resin was bismaleimide(BMI)resin,and the reinforcement was carbon fibe... A new isothermally based cure kinetic model for the prepreg was presented using an industrially supplied prepreg rather than neat resin.The matrix resin was bismaleimide(BMI)resin,and the reinforcement was carbon fiber T700-12S.A series of isothermal Differential Scanning Calorimetry(DSC)tests were performed and analyzed by the proposed nth-order reaction model.An increase in the cure rate was observed at the higher temper-ature in both neat and prepreg.After reaching the peak value,the cure rate of resin dropped off faster in prepreg,resulting in a lower average value of the ultimate heat of reaction.The presence of carbon fiber was found to significantly impact the curing behavior of the resin,leading to significant changes from the neat resin kinetic parameters.The carbon fibers imposed restrictions on the molecular mobility of reactive species,reduced the extent of polymeri-zation within the system and did not change the cure mechanism of resin. 展开更多
关键词 Cure kinetics Neat BMI Prepreg DSC
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Deviation-Rectifying Control of Carbon Fiber Prepreg Slitting and Winding Machine 认领 引用 被引量：3
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作者 Wen Liwei Zhu Tengfei +3 位作者 Qin Lihua Wang Xianfeng Pan Jie Feng Qiaoqiao 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2018年第3期547-555,共9页
With the growing needs of prepreg tapes for the automated fiber placement(AFP),the deviation-rectifying of prepreg in slitting process was investigated on a self-developed 16-tow prepreg slitting and winding machine.T... With the growing needs of prepreg tapes for the automated fiber placement(AFP),the deviation-rectifying of prepreg in slitting process was investigated on a self-developed 16-tow prepreg slitting and winding machine.The process of slitting and rewinding of prepreg tape was introduced,and the reason of prepreg tape deviation in slitting process was analyzed.In order to ensure the quality of the narrow prepreg slits,the application of the fuzzy PID algorithm in a closed-loop control system was discussed.A fuzzy PID algorithm was designed by combining fuzzy rules and PID controller.By applying it to precise deviation-rectifying control strategy,the automatic control of rectification could be achieved with accuracy of 0.1 mm,which satisfies the requirement of the prepreg tape both in slitting quality and layup quality for AFP. 展开更多
关键词 automated fiber placement prepreg tape slitting and winding fuzzy PID deviation rectifying
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Mechanical Properties of Carbon Epoxy Prepreg Insert Phenolic Resin Injection Moldings 认领 引用 被引量：2
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作者 PINPATHOMRAT Badin KEIGO Nishitani +3 位作者 THUMSORN Supaphom Narongchai O-Charoen Yuqiu YANG HAMADA Hiroyuki 《纤维复合材料》 CAS 2019年第2期3-7,共5页
This study focuses on the insert-injection molding process. The thermoset composite inserts in this study were carbon fiber/epoxy (CF/Epoxy) prepreg sheets. The injected molded part was glass fiber contained phenolic ... This study focuses on the insert-injection molding process. The thermoset composite inserts in this study were carbon fiber/epoxy (CF/Epoxy) prepreg sheets. The injected molded part was glass fiber contained phenolic resin (GF/PF). The CF/Epoxy was placed in the mold cavity prior to injecting GF/PF onto the inserted injection molded CF/Epoxy specimens. The role of adhesion between the inserted part and injected resin on the mechanical properties was evaluated by 3 point bending and impact tests. In addition, the effect of prepreg orientation on the mechanical properties of the prepreg inserted-injection molding system was investigated. It was found that the prepreg with unidirectional orientation significantly improved flexural and impact strength of the inserted injection molding composites, providing better support and resistance to bending and impact loading. The main failure modes of the specimens were structural and adhesive failure. 展开更多
关键词 insert injection molding unidirectional prepregs woven fabric prepreg thermosetting composite
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Effects of Lay-up Types of Out-of-autoclave Prepregs on Preparation Quality of L-shape Composite Laminates 认领 引用 被引量：1
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作者 GONG Ming ZHANG Daijun +1 位作者 ZHANG Jiayang CHEN Xiangbao 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2021年第5期629-635,共7页
Effects of layer quantities and stacking sequences on L-shape composite manufacturing qualities in using OOA(out-of-autoclave)prepregs were studied.The mechanisms of air evacuated in 5 kinds of lay-ups were revealed b... Effects of layer quantities and stacking sequences on L-shape composite manufacturing qualities in using OOA(out-of-autoclave)prepregs were studied.The mechanisms of air evacuated in 5 kinds of lay-ups were revealed by image analysis of cut surfaces and thickness measurements.Results show that air in OOA prepregs is evacuated in two ways.Most of the air is forced out of layers directly by vacuum before air accesses in prepregs closed.Very little entrapped air moves perpendicularly to outer layers under hydrostatic resin pressure.When a laminate contains less than 16 layers,voids can hardly be found in layers.When a laminate contains more than 16 layers,voids cannot be expelled completely during the window of vertical movement.As for stacking sequences,the synergetic effect of slip function and nest function determines the thickness and voids content of laminates.Results show that the average of single layer thickness of unidirectional layers is the lowest,and the average of single layer thickness of quasi-isotropic layers is the highest.The voids content of quasi isotropic is the highest,which is consistent with the theoretical analysis. 展开更多
关键词 OOA prepregs L-shape composite laminates lay-up type
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Simultaneous enhancement of absorbent honeycomb with EM wave absorption and compressive properties realised by fishbone-shaped carbon fibre insertion 认领 引用
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作者 Linhao CHENG Zhengjiang JI +4 位作者 Jian HU Leilei YAN Yuexuan LI Xitao ZHENG Xi WANG 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第3期653-666,共14页
A novel hybrid design method is proposed to improve the Electromagnetic(EM)and mechanical properties of Absorbent Honeycomb Structures(AHS)synergistically.These improvements are achieved by inserting a Glass Fibre-Rei... A novel hybrid design method is proposed to improve the Electromagnetic(EM)and mechanical properties of Absorbent Honeycomb Structures(AHS)synergistically.These improvements are achieved by inserting a Glass Fibre-Reinforced Plastic(GFRP)grid core adhered to fishbone-shaped Carbon Fibre-Reinforced Plastic(CFRP)arrays into an AHS.To this end,a Grid-Enhanced Absorbent Honeycomb Structure(GEAHS)is constructed.Further,the equivalent EM parameters of the AHS are investigated to simplify the simulation model and analyse the enhanced mechanism.The results indicate that the CFRP arrays effectively excite the spoof surface plasmon polariton mode at low frequencies,which greatly widens the effective absorption band and improves absorptivity.Through genetic algorithm optimisation,the average EM wave reflectivity of GEAHS within the range of 2–18 GHz is reduced by 58.1%compared to that of an AHS with only one layer of CFRP prepreg added.In addition,the lateral support provided by the honeycomb core to the GFRP grid walls results in a coupling effect.Thus,the specific compressive strength and energy absorption per volume of the GEAHS increase by 64.8%and 173%,respectively,compared to that of the AHS.Comparing the increased EM and mechanical performances with those of other comparable structures reveals that the present design can be applied to multi-functional design fields. 展开更多
关键词 Absorbent honeycomb CFRP prepreg Electromagnetic wave absorption Mechanical property Sandwich structure
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Associations of Prepregnancy Body Mass Index,Gestational Weight Gain,and Intelligence in Offspring:A Systematic Review and Meta-Analysis 认领 引用 被引量：1
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作者 Si-Meng Zhu Yi-Chen He +2 位作者 Chen Zhang Yan-Ting Wu He-Feng Huang 《Reproductive and Developmental Medicine》 CAS CSCD 2021年第4期247-256,共10页
Objective:Increasing evidences have shown that prepregnancy maternal weight and gestational weight gain(GWG)may associate with offspring’s neurodevelopment.However,the effects of prepregnancy maternal overweight,obes... Objective:Increasing evidences have shown that prepregnancy maternal weight and gestational weight gain(GWG)may associate with offspring’s neurodevelopment.However,the effects of prepregnancy maternal overweight,obesity,and excessive GWG on offspring’s intelligence remain controversial.This meta-analysis aimed to re-assess the association between prepregnancy body mass index(BMI),GWG,and children’s intelligence.Methods:We systematically searched multiple databases,including PubMed,EMBASE,Cochrane Library,and Ovid Medline,from their inception through February 2021.Studies assessing the association between prepregnancy BMI or GWG and children’s intelligence were further screened manually before final inclusion.Cohorts that analyzed the association between prepregnancy BMI or GWG and intelligence of offspring were included,and we used the Mantel-Haenszel fixed-effects method to compute the weighted mean difference(WMD)and 95%confidence interval(CI)of each study.Results:A total of 12 articles were included in this systematic review,while six of them in the meta-analysis.There was a significant full-scale IQ reduction in children born from overweight and obese mothers,with WMDs of-3.08(95%CI:-4.02,-2.14)and-4.91(95%CI:-6.40,-3.42),respectively.Compared with control group,the WMDs for performance and verbal intelligence quotient(IQ)were decreased in overweight and obesity groups.However,we observed no association between children’s full-scale IQ and excessive GWG with WMD of-0.14(95%CI:-0.92,0.65).Conclusions:Women’s prepregnancy overweight and obesity adversely associate with children’s intelligence but no association with excessive GWG.Our study suggests that further researches focusing on the effect of prepregnancy maternal health on offspring’s intelligence development are needed. 展开更多
关键词 Gestational Weight Gain Intelligence Maternal Obesity Offspring Prepregancy Overweight and Obesity
CF/PEEK预浸带制备技术研究进展 认领 引用
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作者 翟虹 包艳玲 +2 位作者 阮英波 景宽 张承双 《宇航材料工艺》 CAS CSCD 北大核心 2026年第3期1-12,共12页
连续碳纤维增强聚醚醚酮(CF/PEEK)复合材料可在高温、冷热交变、湿热及空间环境下长期使用,满足高端装备对防热、减重、抗损伤、可修复性等方面的需求,在国防军工领域应用前景广阔。CF/PEEK预浸带是制备高性能复合材料及其制品的中间材... 连续碳纤维增强聚醚醚酮(CF/PEEK)复合材料可在高温、冷热交变、湿热及空间环境下长期使用,满足高端装备对防热、减重、抗损伤、可修复性等方面的需求,在国防军工领域应用前景广阔。CF/PEEK预浸带是制备高性能复合材料及其制品的中间材料,具有耐热性优良、力学性能优异、耐疲劳性好、可长期储存等特点。本文对CF/PEEK预浸带制备技术研究进展、技术特点和商业化产品情况进行了分析,可为高性能热塑性复合材料技术发展提供参考。 展开更多
关键词 CF/PEEK预浸带 热塑性复合材料 工艺方法 技术特点 产品性能
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连续碳纤维增强聚醚醚酮预浸丝制备及增材制造应用研究进展 认领 引用
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作者 陈艳雷 王宏晓 +4 位作者 郭嘉仪 朱登洁 李鑫鹏 冯欣雨 惠延波 《工程塑料应用》 EI CAS CSCD 北大核心 2026年第1期193-199,206,共7页
连续碳纤维增强聚醚醚酮(CCF/PEEK)复合材料因高耐热性与可回收加工性,正成为高端结构件增材制造的重要材料。介绍了CCF/PEEK预浸丝的熔融浸渍拉挤、喷嘴内原位浸渍与粉末浸渍复合三种成型工艺,回顾了模具温度、牵引速度、纤维体积分数... 连续碳纤维增强聚醚醚酮(CCF/PEEK)复合材料因高耐热性与可回收加工性,正成为高端结构件增材制造的重要材料。介绍了CCF/PEEK预浸丝的熔融浸渍拉挤、喷嘴内原位浸渍与粉末浸渍复合三种成型工艺,回顾了模具温度、牵引速度、纤维体积分数与进料方式对浸渍质量、孔隙率与力学性能的影响;简述了上浆剂与等离子体等界面改性在提升润湿性、界面剪切与层间致密度方面的进展;概述了国内外适配高温热塑性与连续纤维协同成形的增材制造装备及其在航空航天、汽车与风电等领域的应用。分析表明,PEEK树脂高黏度、界面惰性及工艺窗口窄是造成浸渍不足与界面弱化的主要因素。未来亟需面向工艺—界面—装备—智能化的协同优化,突破制丝工艺与界面改性协同控制、增材制造装备升级以及数据驱动的在线监测与智能预测等关键环节。 展开更多
关键词 连续碳纤维 聚醚醚酮 预浸丝 成型工艺 界面改性 增材制造
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中温固化改性氰酸酯树脂流变特性研究 认领 引用
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作者 孙鹏鹏 吴健伟 +2 位作者 王冠 赵玉宇 魏运召 《黑龙江科学》 2026年第2期14-18,共5页
围绕自制中温固化改性氰酸酯树脂的流变行为展开系统研究。采用DSC分析固化反应动力学,测定起始温度、峰值温度等参数,解析热力学特性与机理,通过流变仪在等温及动态升温条件下测试获取不同温度、时间下的粘度变化数据。基于Arrhenius... 围绕自制中温固化改性氰酸酯树脂的流变行为展开系统研究。采用DSC分析固化反应动力学,测定起始温度、峰值温度等参数,解析热力学特性与机理,通过流变仪在等温及动态升温条件下测试获取不同温度、时间下的粘度变化数据。基于Arrhenius方程构建化学流变模型,该模型拟合效果良好,可准确描述树脂流变行为。将模型应用于热熔法预浸工艺评估,模拟温度-时间-粘度关系,为优化预浸料制备参数提供理论依据。 展开更多
关键词 氰酸酯 流变模型 预浸工艺
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挖补修复用FRP预浸料自动铺放的基础实验研究 认领 引用
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作者 宿友亮 刘文辉 +2 位作者 惠继录 马泽峰 吕伟珍 《制造技术与机床》 CAS 北大核心 2026年第5期62-71,共10页
基于真空吸附夹具的预浸料补片自动铺放技术是实现纤维增强树脂基(fiber reinforced plastics, FRP)复合材料构件高质高效挖补修复的有效途径。铺放中如何降低预浸料补片的变形是有效控制褶皱、翘边等缺陷的前提。文章自主开发了挖补修... 基于真空吸附夹具的预浸料补片自动铺放技术是实现纤维增强树脂基(fiber reinforced plastics, FRP)复合材料构件高质高效挖补修复的有效途径。铺放中如何降低预浸料补片的变形是有效控制褶皱、翘边等缺陷的前提。文章自主开发了挖补修复用预浸料补片自动铺放原理性实验台,创新性地开展了真空吸盘夹具吸附抓取、转移和铺放预浸料补片的基础实验研究,探究了铺放过程中温度、吸盘结构尺寸和分布以及悬臂长度对补片变形的影响。结果表明,铺放温度为25℃、采用多孔均布的方形吸盘能有效降低补片变形。补片尺寸不超过120 mm×120 mm,即悬臂长度不超过31 mm,因自重产生的悬垂量不超过2.75 mm时,翘边及褶皱等缺陷均在容限范围内。基于在线观测结果提出了补片悬垂状态下的悬臂梁、补片压展过程中的简支梁、补片四角末端翘起状态下的悬臂梁和补片中间拱起状态下的简支梁等4种简化模型,以分析预浸料补片在抓取及下压中的位姿及变形行为对翘边及褶皱等缺陷的影响。上述研究结论可为铺放基础研究及工艺制定提供理论支撑。 展开更多
关键词 挖补修复 预浸料补片 自动铺放 温度 悬垂变形 缺陷
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圆柱多级网格结构纤维预浸带缠绕成型技术研究 认领 引用
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作者 孙守政 郭震宇 +3 位作者 冉旭东 李昆泰 胡潘 韩振宇 《精密成形工程》 北大核心 2026年第2期48-59,共12页
目的 解决在制造复合材料多级网格结构时,传统纤维缠绕技术容易在节点处产生纤维堆积、架空等缺陷,以及预浸带在深沟槽模具中难以压实成型的技术难题。方法 自主研制了一款轻量化、模块化设计的预浸带专用缠绕头及其精密控制系统。该缠... 目的 解决在制造复合材料多级网格结构时,传统纤维缠绕技术容易在节点处产生纤维堆积、架空等缺陷,以及预浸带在深沟槽模具中难以压实成型的技术难题。方法 自主研制了一款轻量化、模块化设计的预浸带专用缠绕头及其精密控制系统。该缠绕头集成了可灵活调节的丝束导向通道、可实现张力稳定的闭环控制系统、结合“热风加热”与“涡流管冷却”的主动式热管理单元以及用于复杂路径的剪切与重送机构。基于Kagome多级网格的几何特点,规划了“三阶段分层填充”缠绕策略,并通过Python脚本编程生成相应的设备控制代码。为保障复杂构件的顺利脱模,设计并采用了具有“负拔模角”的硅胶-石膏复合柔性模具。结果 成功进行了复合材料圆柱多级网格构件的自动化缠绕成型与固化实验。缠绕过程稳定,节点处纤维堆积现象显著减轻,肋条形貌完整、层间结合紧密,固化脱模后构件尺寸精度良好。轴压测试结果表明,构件最大极限载荷为24 060.60 N,破坏过程呈现典型的层间分离与整体屈曲的渐进损伤模式,验证了结构具有较高的承载能力与损伤容限。结论 本研究验证了所开发的缠绕头及分阶段缠绕工艺用于制备复杂多级网格结构的可行性,为高性能复合材料网格结构的低成本、高质量自动化制造提供了新途径。 展开更多
关键词 复合材料网格结构 预浸带缠绕 缠绕头设计 多级网格 成型工艺
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T800级碳纤维/双马树脂复合材料耐高温性能研究 认领 引用
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作者 李金亮 吴军 +3 位作者 吴东辉 高小茹 李庚 黄鹤 《高科技纤维与应用》 CAS 2026年第2期33-39,共7页
为了提高热熔双马树脂体系及其复合材料的耐热性能,采用新型双马树脂、二苯甲烷型双马树脂及烯丙基化合物为基体,制备了BMI-B、BMI-BP树脂体系。通过DSC、黏度-温度试验、DMA、TGA、力学试验等分析方法对树脂体系的固化工艺、黏度-温度... 为了提高热熔双马树脂体系及其复合材料的耐热性能,采用新型双马树脂、二苯甲烷型双马树脂及烯丙基化合物为基体,制备了BMI-B、BMI-BP树脂体系。通过DSC、黏度-温度试验、DMA、TGA、力学试验等分析方法对树脂体系的固化工艺、黏度-温度关系、耐热性能及其复合材料单向板的力学性能进行研究,结果显示,BMI-B及BMI-BP树脂体系能够满足热熔预浸工艺要求,在最高270℃固化温度下,BMI-BP树脂固化物的Tg为382.3℃,Td5为426.3℃,与BMI-B树脂体系相比分别提高了48.1℃和8.6℃。在300℃下,BMI-BP体系复合材料单向板弯曲强度为1199.14 MPa,强度保留率大于60%,层间剪切强度为44.91 MPa,保留率大于50%,复合材料具有优异的耐高温性能。 展开更多
关键词 双马树脂 预浸料 复合材料 耐热性能 力学性能
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连续纤维热塑性预浸丝材拉挤制备过程中纤维弯曲变形与损伤阈值的流固耦合研究 认领 引用
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作者 于颖 来子超 王玉 《机电工程技术》 2026年第3期1-5,30,共5页
在用于增材制造的连续纤维增强热塑性预浸丝材多道模拉挤成型过程中,纤维在高黏度树脂流动与模具约束的共同作用下易发生屈曲与损伤,进而影响成型稳定性与力学性能。针对多道模拉挤过程中非牛顿树脂流动、热传递及纤维受力行为耦合机理... 在用于增材制造的连续纤维增强热塑性预浸丝材多道模拉挤成型过程中,纤维在高黏度树脂流动与模具约束的共同作用下易发生屈曲与损伤,进而影响成型稳定性与力学性能。针对多道模拉挤过程中非牛顿树脂流动、热传递及纤维受力行为耦合机理不清的问题,基于有限元方法与Carreau黏度模型,构建了耦合温度场、流场与应力场的多物理场流固耦合数值模型,用于分析工艺参数对纤维成型行为的影响规律。采用单向流固耦合策略实现树脂流动载荷向纤维结构的传递,并在不同拉挤速度、模具温度及模具结构参数条件下开展数值仿真,进一步结合预浸丝制备实验以及对应丝材的力学性能测试。在稳定制备出拉伸强度为1047.7 MPa的高性能预浸丝材基础上,确定了纤维发生损伤的临界弯曲变形区间,并提出了以等效弹性应变1.078×10-3作为适用于连续稳定制备的纤维弯曲变形阈值,为多道模拉挤工艺参数优化与模具系统设计提供了定量依据。 展开更多
关键词 预浸丝 纤维损伤 热塑性树脂 有限元仿真 3D打印
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固化反应对单向碳纤维预浸料介电性能的影响 认领 引用
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作者 陈楷华 陈静 +4 位作者 严妍 郭胜惠 杨黎 周俊文 李鑫培 《真空电子技术》 2026年第2期38-44,共7页
微波加热固化碳纤维增强树脂基复合材料(Carbon Fiber Reinforced Plastic,CFRP)具有节能降耗的优势,但微波固化技术仍面临加热控制难的局限性。文章采用圆柱形谐振腔微扰法,深入研究单向碳纤维预浸料复介电常数在固化过程中的变化规律... 微波加热固化碳纤维增强树脂基复合材料(Carbon Fiber Reinforced Plastic,CFRP)具有节能降耗的优势,但微波固化技术仍面临加热控制难的局限性。文章采用圆柱形谐振腔微扰法,深入研究单向碳纤维预浸料复介电常数在固化过程中的变化规律。通过对未固化预浸料-50~300℃范围内的动态差示扫描量热法(Differential Scanning Calorimetry,DSC)测试,获得未固化预浸料的玻璃化转变温度Tg,0=-13.8℃。流变测试表明常温下树脂基体处于溶胶态,固化51 min后发生凝胶转变。动态热机械分析(Dynamic Mechanical Analysis,DMA)测试表明树脂基体在73 min后开始发生玻璃化转变。介电常数测试表明预浸料介电常数ε′r在整个固化过程中在120.2~127.3之间波动;介电损耗ε″eff在固化过程的前55 min内稳定在0.63,固化60 min后由于凝胶转变下降至0.52,75~90 min阶段由于玻璃化转变ε″eff提升至1.4,完全固化的预浸料ε″eff值下降至0.72并维持稳定。本研究为量化CFRP微波能量吸收、转化提供了数据支撑,有利于改善CFRP微波加热的精确控制。 展开更多
关键词 单向碳纤维预浸料 复介电常数 DSC 流变特性 DMA
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不同浸渍工艺CF/PAEK预浸料的自动铺放成型质量及性能 认领 引用 被引量：1
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作者 顾星河 来晓靓 +4 位作者 纪毓杨 林秋实 李博健 陶群燕 谢富原 《工程塑料应用》 EI CAS CSCD 北大核心 2026年第3期130-137,共8页
为研究国产热塑性预浸料的自动铺放工艺适配性,分别以熔融浸渍法和溶液浸渍法制备的碳纤维增强聚芳醚酮(CF/PAEK)预浸料为原材料,借助国产激光加热自动铺丝设备,采用原位固结、原位热压、热压罐后固结三种不同的工艺方法制备复合材料,... 为研究国产热塑性预浸料的自动铺放工艺适配性,分别以熔融浸渍法和溶液浸渍法制备的碳纤维增强聚芳醚酮(CF/PAEK)预浸料为原材料,借助国产激光加热自动铺丝设备,采用原位固结、原位热压、热压罐后固结三种不同的工艺方法制备复合材料,并通过无损检测、金相表征、压缩性能测试等方法评价复合材料的成型质量及性能。结果表明,溶液浸渍法制备的预浸料的浸渍质量更好,在原位固结和原位热压工艺中,使用溶液浸渍预浸料制备的复合材料0°压缩性能优于熔融浸渍法。溶液浸渍CF/PAEK复合材料原位固结工艺下的0°压缩强度为705.6 MPa,压缩模量为129.9 GPa,在原位热压工艺下的0°压缩强度为686.1 MPa,压缩模量为145.1 GPa。在热压罐后固结工艺条件下,熔融浸渍预浸料制备的复合材料力学性能明显优于溶液浸渍预浸料制备的复合材料,其0°压缩强度为960.4 MPa,压缩模量为131.9 GPa,冲击后压缩强度达到317.1 MPa,这主要是由于热压罐后固结工艺能够消除熔融浸渍法预浸料的缺陷,显著提升了复合材料的成型质量。 展开更多
关键词 热塑性复合材料 自动铺放成型 预浸料 激光加热 成型工艺
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Curing kinetics and mechanical properties of bio-based composite using rosin-sourced anhydrides as curing agent for hot-melt prepreg 认领 引用 被引量：8
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作者 ZHANG XuFeng WU YunQiQiGe +2 位作者 WEI JiaHu TONG JianFeng YI XiaoSu 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2017年第9期1318-1331,共14页
In this study, a novel bio-based thermosetting system has been developed from epoxy resin （EP）, with rosin-sourced anhydrides （maleopimaric acid, RAM） as curing agent and imidazole type latent catalyst （two amino... In this study, a novel bio-based thermosetting system has been developed from epoxy resin （EP）, with rosin-sourced anhydrides （maleopimaric acid, RAM） as curing agent and imidazole type latent catalyst （two amino imidazole salt complex, IMA）, to be used as matrix for hot-melt prepreg curing at mid-temperature. For comparison, the epoxy resin system with petroleum sourced hardener methylhexahydrophthalicanhydride （MHHPA） was also examined. The curing behaviour and mechanism were investigated by non-isothermal differential scanning calorimeter （DSC） analysis and Fourier transform infrared （FTIR） spectra. The results showed that the curing course of bio-based epoxy resin system containing RAM included two stages, which were the reaction between the free carboxyl group of RAM and oxirane ring under the acceleration of IMA, and the main reaction attributed to the reaction between anhydride and oxirane. According to Kissinger method, the reaction activation energy （E,） of two stages were 68.9 and 86.5kJmo1-1, respectively. The Eo of EP/MHHPA and EP/IMA resin system were 81.04 and 77.9kJmol-I. The processing property of EP/RAM/IMA system, i.e. the relationship between viscosity-temperature-time, was characterized by cone-plate viscometer aim to decide the processing parameter ofprepreg preparation. The effect of RAM content on mechanical performance and dynamic mechanical property was investigated. Noteworthily, compared with the laminates with EP/MHHPA as matrix, the laminates with RAM as hardeners achieved a 44%, 73% and 70℃ increase in bending strength, bending modulus and the glass transition temperature, respectively, due to the bulky hydrogenated phenanthrene ring structure incorporated into the cross-linking networks. When the fiber volume fraction reached 47%, the mechanical property of the laminates prepared with hot melt prepreg was superior or comparable to that of composites with pure petroleum sourced matrix. RAM as cross-linking agent of epoxy resin holds a great potential to satisfy the requirement of composites such as structure and secondary structure parts preparation. 展开更多
关键词 bio-based epoxy resin rosin cure kinetics hot-melt prepreg mechanical property
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Investigation of carbon fiber composite stiffened skin with vacuum assisted resin infusion/prepreg co-curing process 认领 引用 被引量：8
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作者 MA XuQiang GU YiZhuo +2 位作者 LI Min LI YanXia ZHANG ZuoGuang 《Science China(Technological Sciences)》 SCIE EI CAS 2014年第10期1956-1966,共11页
Co-cured vacuum assisted resin infusion process(co-VARI process),which combined vacuum assisted resin infusion(VARI)with prepreg vacuum bag only process(VBO),was adopted to fabricate T-shaped stiffened skin with non-c... Co-cured vacuum assisted resin infusion process(co-VARI process),which combined vacuum assisted resin infusion(VARI)with prepreg vacuum bag only process(VBO),was adopted to fabricate T-shaped stiffened skin with non-crimp fabric(NCF)stiffener and prepreg skin.During compaction stage of co-VARI process,prepreg resin impregnated fiber fabric under elevated temperature and vacuum pressure.This phenomenon was characterized by fluorescent micrographs with different holding temperature and time.Its influences on processing quality and mechanical performance for co-VARI stiffened skin with different filler materials at triangular region were further analyzed by optical micrographs and pull-off test,respectively.The results show that increasing holding temperature and prolonging holding time can promote prepreg resin impregnation in fiber fabric.Moderate prepreg resin impregnation is favorable to reduce resin rich region and increase fiber volume fraction at prepreg-fabric interface.Moreover,prepreg resin impregnation effect plays significant roles on pull-off performance for co-VARI stiffened skin with fabric filler but has negligible influences on specimens with prepreg filler.In addition,compared with stiffened skin with fabric filler,superior processing quality and pull-off performances are achieved for co-VARI stiffened skin with prepreg core filler.These results are helpful to optimize processing procedures and fabricate composite structure by coVARI process. 展开更多
关键词 polymer-matrix composites prepreg vacuum assisted resin infusion stiffened skin structure co-curing
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热压成型工艺对单向碳纤维/聚酰胺6预浸料性能的影响 认领 引用
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作者 吴竹平 徐乐婷 +8 位作者 童方强 曾虹玉 韩妃 李菲 杜诚杰 沈伟 陈立峰 占海华 赵德方 《工程塑料应用》 EI CAS CSCD 北大核心 2026年第7期116-124,共9页
针对碳纤维(CF)与树脂基体间润湿性差、界面黏附力弱,从而制约CF增强热塑性复合材料(CFRTP)整体性能充分发挥的问题,以热塑性聚酰胺6(PA6)为基体,采用热压工艺通过叠层覆膜法制备了单向CF/PA6预浸料。系统研究了热压温度、热压时间、热... 针对碳纤维(CF)与树脂基体间润湿性差、界面黏附力弱,从而制约CF增强热塑性复合材料(CFRTP)整体性能充分发挥的问题,以热塑性聚酰胺6(PA6)为基体,采用热压工艺通过叠层覆膜法制备了单向CF/PA6预浸料。系统研究了热压温度、热压时间、热压压力三个工艺参数对预浸料微观形貌、界面结合状态及性能的调控作用。设计了正交试验方案,系统分析了温度、时间、压力在成型过程中的作用,明确了工艺参数对预浸料性能的影响规律。通过工艺优化,有效改善了CF与PA6界面黏附性,提升了预浸料的综合性能,并确定了最佳成型条件,在此条件下CF/PA6预浸料的力学性能和热稳定性实现了协同增强,成功制备出高性能预浸料。研究结果表明,热压温度对预浸料性能的影响最为显著,其次为热压时间,热压压力的影响最小;预浸料的最佳成型条件为264℃、5 min、3 MPa;热压工艺条件对预浸料的热性能影响不大,264℃条件下预浸料表现出较好的热稳定性。 展开更多
关键词 碳纤维 聚酰胺6 预浸料 力学性能 热性能
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