Dynamic Out-of-Plane Compressive Failure Mechanism of Carbon/Carbon Composite: Strain Rate Effect on the Defect Propagation and Microstructure Failure

IF 1.5 4区 材料科学 Q3 ENGINEERING, MECHANICAL
G. Fei, Q. Fei, Yanbin Li, N. Gupta
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引用次数: 4

Abstract

Out-of-plane compression experiments with the strain rate from 0.0001/s to 1000/s are performed on a three-dimensional (3D) fine weave-pierced Carbon/Carbon (C/C) composite using a universal testing machine, a high-speed testing machine, and a split Hopkinson pressure bar (SHPB). The compressive failure mechanism of the composite is analyzed by a multi-scale analysis method, which ranges from micro-scale defect propagation, through meso-scale microstructure failure, to macro-scale material failure. In order to predict the out-of-plane compressive properties of 3D fine weave-pierced C/C composite at different strain rates, a strain-rate-dependent compressive constitutive model is proposed. The results show that the out-of-plane compressive behavior of the 3D fine weave-pierced C/C composite is sensitive to strain rate. With increasing the strain rate, the initial compressive modulus, the maximum stress, and the strain at the maximum stress increase. The difference in mechanical behavior between quasi-static and high strain rate compression is owing to the strain rate effect on the defect propagation of the 3D fine weave-pierced C/C composite. The proposed constitutive model matches well with the experimental data.
碳/碳复合材料动态面外压缩破坏机制:应变速率对缺陷扩展和微观组织破坏的影响
采用万能试验机、高速试验机和分离式霍普金森压杆(SHPB)对三维(3D)细编织穿孔碳/碳(C/C)复合材料进行应变速率为0.0001/s ~ 1000/s的面外压缩实验。采用多尺度分析方法对复合材料的压缩破坏机制进行了分析,从微观尺度的缺陷扩展到中观尺度的微观结构破坏,再到宏观尺度的材料破坏。为了预测不同应变率下三维细织孔C/C复合材料的面外压缩性能,提出了一种与应变率相关的压缩本构模型。结果表明:三维细织穿C/C复合材料的面外压缩行为对应变速率敏感;随着应变速率的增大,初始压缩模量、最大应力和最大应力处的应变均增大。准静态压缩与高应变率压缩的力学行为差异主要是由于应变率对三维细织穿C/C复合材料缺陷扩展的影响。提出的本构模型与实验数据吻合较好。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
3.00
自引率
0.00%
发文量
30
审稿时长
4.5 months
期刊介绍: Multiscale characterization, modeling, and experiments; High-temperature creep, fatigue, and fracture; Elastic-plastic behavior; Environmental effects on material response, constitutive relations, materials processing, and microstructure mechanical property relationships
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