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Strain-Rate-Dependent In-Plane Compressive Properties of 3D Fine Weave Pierced C/C Composite: Failure Mechanism and Constitutive Model
Acta Mechanica Solida Sinica ( IF 2.2 ) Pub Date : 2021-07-21 , DOI: 10.1007/s10338-021-00243-x
Fei Guo 1, 2 , Qingguo Fei 1, 3 , Yanbin Li 1, 3 , Nikhil Gupta 4
Affiliation  

In-plane compression experiments are performed on 3D fine weave pierced C/C composite at a wide strain rate range of 0.0001/s–1000/s. The in-plane compressive failure mechanism of the composite at quasi-static and high strain rates is analyzed by a scanning electron microscope. The results show that the in-plane compressive modulus, maximum stress and the corresponding strain increase with increasing strain rate. The quasi-static in-plane compressive failure mode of the 3D fine weave pierced C/C composite is characterized by the shear failure at the angle of \(45^{\circ }\) and the local buckling of the x-direction fiber bundles. In comparison, the high strain rate in-plane compression failure mode of the composite is characterized by the compressive fracture of the interlaminar matrix and the progressive compression failure of the x-direction fiber bundles. A strain-rate-dependent in-plane compressive constitutive model is proposed to predict the dynamic in-plane compressive response of the composite. The proposed constitutive model is verified by experimental data.



中文翻译:

3D 细编织穿孔 C/C 复合材料的应变率相关平面内压缩特性:失效机制和本构模型

在 0.0001/s–1000/s 的宽应变率范围内对 3D 细编织穿孔 C/C 复合材料进行面内压缩实验。通过扫描电子显微镜分析了复合材料在准静态和高应变率下的面内压缩破坏机制。结果表明,面内压缩模量、最大应力和相应的应变随着应变速率的增加而增加。3D 细编织穿孔 C/C 复合材料的准静态面内压缩破坏模式的特征是在角度\(45^{\circ }\)处的剪切破坏和x的局部屈曲-方向纤维束。相比之下,复合材料的高应变率面内压缩破坏模式的特征是层间基体的压缩断裂和x方向纤维束的渐进压缩破坏。提出了一种应变率相关的面内压缩本构模型来预测复合材料的动态面内压缩响应。所提出的本构模型得到了实验数据的验证。

更新日期:2021-07-22
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