Dynamic caustics in unidirectional fiber-reinforced composites with mode I cracks: Experiment and numerical simulation

被引：6

作者：

Hao, Wenfeng ^{[1
,2
]}

Sheng, Xixuan ^{[1
]}

Guo, Guangping ^{[2
]}

Chen, Xinwen ^{[2
]}

Zhu, Jianguo ^{[1
]}

机构：

[1] Jiangsu Univ, Fac Civil Engn & Mech, Zhenjiang, Jiangsu, Peoples R China

[2] Beijing Inst Aeronaut Mat, Beijing Key Lab Aeronaut Mat Testing & Evaluat, Beijing 100095, Peoples R China

来源：

MECHANICS OF ADVANCED MATERIALS AND STRUCTURES | 2018年 / 25卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Fiber-reinforced composites; dynamic caustics; stress singularities; stress intensity factor; crack velocity; STRESS-INTENSITY FACTORS; MATRIX CRACK; PIEZOELECTRIC MATERIALS; SHADOW SPOT; FRACTURE; PROPAGATION; BEHAVIOR; PLATES; SINGULARITIES; SOLIDS;

D O I：

10.1080/15376494.2016.1255822

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The stress singularities of a dynamic crack tip in orthotropic composites were studied through caustics. The parametric equations of the caustic and its initial curve surrounding the dynamic crack tip were derived through the elastic dynamic crack solutions of orthotropic composites and the basic principle of reflective caustics. Theoretical caustics and initial curves for three kinds of orthotropic composites were simulated, and the effects of crack velocity on the caustics and initial curveswere analyzed. In comparison with numerical results, the dynamic caustic experiment was performed for dynamic cracks along the material axes in unidirectional, fiber-reinforced composites under drop-hammer, three-point-bend loading.

引用

页码：286 / 294

页数：9

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