A numerical multi-scale method for analyzing the rate-dependent and inelastic response of short fiber reinforced polymers: Modeling framework and experimental validation

作     者：Ahmadi, H. Hajikazemi, M. Finazzi, D. Sinchuk, Y. Van Paepegem, W. 

作者机构：Univ Ghent Fac Engn & Architecture Dept Mat Text & Chem Engn Technol Pk 46 B-9052 Zwijnaarde Belgium SIM M3 Program Technol Pk 48 B-9052 Zwijnaarde Belgium Technol Pk 46 B-9052 Zwijnaard Belgium 

出 版 物：《COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING》 (Compos Part A Appl Sci Manuf)

年 卷 期：2024年第179卷

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0802[工学-机械工程] 

基　　金：ICON project "ProPeL" SIM (Strategic Initiative Materials in Flanders) VLAIO (Flemish government agency Flanders Innovation & Entrepreneurship) Fonds voor Wetenschappelijk Onderzoek [1202522N] DPI [812T17] 

主　　题：Multi-scale method Short fiber reinforced polymers Rate dependency Two-layer viscoplastic model Anisotropic model Multi -step averaging method 

摘      要：This research presents a numerical multi-scale approach that efficiently addresses the inelastic and timedependent mechanical response of short fiber reinforced polymers (SFRPs) under monotonic loading conditions by linking the mechanical analysis from microscale analysis to a continuum model. To do so, first, the mechanical performance of a recently suggested unit cell, considering the intrinsic mechanical characteristics of both fiber and matrix, is studied to address the inelastic and rate-dependent mechanical behavior of completely aligned SFRPs. Then, the evaluated mechanical response is linked to the Hill s plasticity and two-layer viscoplastic (TLVP) models to represent the anisotropic mechanical response of SFRPs. Furthermore, an easy-to-use multi-step homogenization process is considered to numerically incorporate the influence of fiber misalignments. Finally, the suggested multi-scale technique is thoroughly validated at different strain rates, by using experimental observations of short fiber composites with high volume fraction and direct FE simulations of RVEs with complex microstructures.