相间
材料科学
复合材料
热解炭
化学气相渗透
破损
剪切(物理)
分子动力学
抗剪强度(土壤)
复合数
热解
生物
工程类
计算化学
土壤科学
土壤水分
遗传学
化学
环境科学
废物管理
作者
Xuming Niu,Jie Bian,Xihui Chen,Junjie Ding,Zhigang Sun,Yingdong Song
标识
DOI:10.1088/1361-651x/ac2478
摘要
Abstract In this paper, a molecular dynamics simulation model was established for SiC/pyrolytic carbon (PyC)/SiC composites manufactured through a chemical vapor phase infiltration (CVI) process based on microscopic observation results to investigate the shear strength and failure mechanism of PyC interphase. The simulation results showed that due to the PyC interphase’s disordered structure, the carbon layer underwent non-planar shear, overlap, flip, and deflection during the shearing process, which increased the shear strength of the composites. In addition, when the strength of the PyC interphase was lower than the bonding strength with a fiber and matrix, failure was caused by the internal breakage of the PyC interphase; when the strength of the PyC interphase was higher than the bonding strength with a fiber or matrix, failure was caused by the debonding of the PyC interphase with a fiber or matrix.
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