Progressive Damage Approach to Simulating Low Velocity Impact Response of Plain Weave C/SiC Composites
Based on progressive damage theory, a 3D laminated model with an orthotropic property in plane was established to simulate the response of plain weave carbon fiber reinforced silicon carbide(C/SiC) ceramic matrix composites(CMC) under low velocity impact(LVI). Intra-layer damage and inter-layer damage were taken into account, respectively. Three scalar damage variables, associated with the degradation of warp modulus, weft modulus and shear modulus, respectively, were proposed to characterize intra-layer damage evolutions. The intra-layer constitutive model was implemented into MSC.Dytran, via its user subroutine EXFAIL1. The potential delamination region was considered as a discrete cohesive zone. Three vector spring elements were placed into every two adjacent nodes to simulate the inter-layer joints. A scalar damage variables, associated with the degradation of the three vector spring elements, were brought forward to characterize the inter-layer damage evolutions. The inter-layer constitutive model was implemented into MSC.Dytran, via its user subroutine EXELAS. Damage area, indentation depth of C/SiC composite plates and time history of impact force were obtained to compare with experimental results. The numerical results show overall good agreement with experimental results.
Plain weave C/SiC CMC Low velocity impact Progressive damage Damage evolution
Chen Liuding Tong Xiaoyan Zheng Xiang Yao Leijiang
National key Laboratory of Science and Technology on UAV, Northwestern Polytechnical University, Xi’ School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China National key Laboratory of Science and Technology on UAV, Northwestern Polytechnical University, Xi’
国际会议
沈阳
英文
241-245
2010-07-28（万方平台首次上网日期，不代表论文的发表时间）