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A pseudo-elastic damage-based model for compressive stress in expanded polystyrene foams 认领 引用
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作者 Alejandro E.Rodriguez-Sanchez 《Theoretical & Applied Mechanics Letters》 EI CAS CSCD 2026年第2期175-184,共10页
This work presents the application of a pseudo-elastic model to address the uniaxial compressive stress-strain behavior of expanded polystyrene foams.The model combines an Ogden-based hyperfoam formulation for the loa... This work presents the application of a pseudo-elastic model to address the uniaxial compressive stress-strain behavior of expanded polystyrene foams.The model combines an Ogden-based hyperfoam formulation for the loading path of experimental testing with a damage-dependent approach for the unloading.The loading during compression is described using a simplified hyperfoam strain-energy function that effectively captures the nonlinear response of compressible polymer foams.For the unloading path,the model incorporates a scalar damage parameter controlled by three key variables:maximum damage,a damage evolution rate,and a transition parameter.Experimental validation confirms the model's accuracy in predicting the mechanical response of polystyrene foams,including inelastic phenomena.This precision is supported by coefficient of determination R2 values close to unity when comparing the model's predictions with experimental data.Thus,the proposed model provides a practical tool for analyzing the compressive stress response in polystyrene foams. 展开更多
关键词 Expanded polystyrene Compressive stress Pseudo-elastic model Stress-strain curves
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