Progressive Damage Approach to Simulating Low Velocity Impact Response of Plain Weave C/SiC Composites

Abstract:

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.

• Periodical: Advanced Materials Research (Volumes 118-120)
• Pages: 241-245
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.118-120.241
• Online since: June 2010
• Authors: Liu Ding Chen, Xiao Yan Tong, Xiang Zheng, Lei Jiang Yao
• Keywords: Ceramic Matrix Composite (CMC), Damage Evolution, Low Velocity Impact (LVI), Plain Weave, Progressive Damage

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