Weave geometry generation avoiding interferences for mesoscale RVEs

作     者：Daniel Höwer Shengkai Yu Trenton M.Ricks Brett A.Bednarcyk Evan J.Pineda Bertram Stier Stefanie Reese Jaan-Willem Simon 

作者机构：Institute of Applied MechanicsRWTH Aachen University52074 AachenGermany NASA Glenn Research CenterClevelandOH 44135USA Collier Research and Development CorporationNewport NewsVA 23606USA 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2019年第35卷第12期

页      面：2869-2882页

核心收录：

学科分类：07[理学] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0701[理学-数学] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 070101[理学-基础数学] 

基　　金：support from the Excellence Initiative of the German federal and state governments (GS018/OPBF051) funding through the von Kármán fellowship GS069 the Alexander von Humboldt Foundation Funding by the Ministry of Innovation, Science and Research of the State of North Rhine-Westphalia is acknowledged by J.-W. Simon the support from the Space Technology Mission Directorate Composite Technology for Exploration Project the Aeronautics Research Directorate Transformational Tools and Technologies Project 

主　　题：RVE generation Multiscale analysis Composites 

摘      要：An algorithm which allows the generation of representative volume elements(RVEs) for complex woven and warp-interlaced fiber-reinforced composite topologies while avoiding unphysical tow intersections is presented. This is achieved by extending an existing RVE generation strategy in two significant ways:(1) the local cross section shape of the tow is adjusted depending on the local tow curvature in a way that preserves the cross sectional area of the tow, and(2) the elementary crimp interval is separated into a planar and a transition region. The modifications facilitate the generation of a wide range of elaborate textile topologies without tow intersections, which are present without the proposed modifications unless complex tow to tow contact models are introduced. The mechanical properties of plain weaves were predicted based on the topology generated with the proposed algorithm as well as based on RVEs which were constructed based on actual micrographs, i.e. a digital twin of the actual microstructure. A comparison of the predicted mechanical properties based on finite element and Multiscale Generalized Method of Cells techniques shows close agreement. However, some differences exist with respect to experimentally determined material parameters due to the finite dimensions of the specimens. Lastly,mechanical properties of multilayered weaves are predicted with the finite element method. The considered material systems are carbon fiber in epoxy matrix as well as C/C-SiC. However, the procedure is applicable to a wide range of material systems.