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Elastic-Plastic Analysis of Three Point Bending Tests for 3D Circular Braided Glass Fiber Reinforced Composites  

Ryou Hansun (School of Materials Science and Engineering, Seoul National University)
Kim Ji Hoon (School of Materials Science and Engineering, Seoul National University)
Lee Myoung-Gyu (Department of Materials Science and Engineering, Ohio State University)
Kim Dongun (School of Materials Science and Engineering, Seoul National University)
Lee Hyung Rim (School of Materials Science and Engineering, Seoul National University)
Chung Kwangsoo (School of Materials Science and Engineering, Seoul National University)
Youn Jae Ryoun (School of Materials Science and Engineering, Seoul National University)
Kang Tae Jin (School of Materials Science and Engineering, Seoul National University)
Publication Information
Textile Science and Engineering / v.42, no.5, 2005 , pp. 336-340 More about this Journal
Abstract
In order to describe the mechanical behavior of highly anisotropic and asymmetric materials such as fiber reinforced composites, the elastic-plastic constitutive equations were used based on the recently developed yield criterion and hardening laws. As for the yield criterion, modified Drucker-Prager yield surface was used to represent the orthotropic and bi-modular (asymmetric) properties of composite materials, while the anisotropic evolution of back-stress was used to account for the hardening behavior. Experimental procedures to obtain the material parameters of the hardening laws and yield surface are presented for 3D braided glass fiber reinforced composites. For verification purposes, finite element simulation results based on the proposed constitutive laws have been compared with measurements for the three point bending tests.
Keywords
3D circular braided glass fiber reinforced composites; modified Drucker-Prager yield criterion; bi-modular; elastic-plastic constitutive equations;
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