含孔和切口C/C编织复合材料静态拉伸下的力学性能

唐玉玲; 泮世东; 周振功; 杨银环

含孔和切口C/C编织复合材料静态拉伸下的力学性能

1.
哈尔滨工业大学复合材料与结构研究所, 哈尔滨 150080;
2.
黑龙江工程学院, 哈尔滨 150050

基金项目: 国家自然科学基金(11272105); 高等学校博士学科专项科研基金(20092302110006)

详细信息

通讯作者:
周振功,教授,博士生导师,研究方向为复合材料及其结构的研究与设计 E-mail:zhouzhg@hit.edu.cn

中图分类号: TB332
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出版历程
- 收稿日期: 2012-05-14
- 修回日期: 2012-08-28
- 刊出日期: 2013-06-14

Mechanical properties analysis of 3D C/C braided composite opening structures under static tension

1.
Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080, China;
2.
Heilongjiang Institute of Technology, Harbin 150050, China

摘要

摘要: 通过对中心开孔、双边半圆切口和双边V型切口三种结构的静态拉伸测试及有限元模拟分析, 比较了不同开孔/切口形式C/C编织复合材料的破坏行为。结果表明: 三种开孔/切口形式的C/C试件在拉伸破坏中均表现为较强线性的应力-应变关系, 且开孔/切口附近有明显的应力集中; 板宽不变时, 缺口强度对开孔/切口尺寸不敏感, 而对其端部的曲率半径较敏感; 孔端部材料不满足线弹性的破坏机制, 发生了大规模的应力松弛, 其尺寸随开孔/切口曲率半径的增大而增大, 而对开孔/切口位置不敏感。
- C/C复合材料 /
- 缺口强度 /
- 3D编织 /
- 拉伸破坏 /
- 强度分析
Abstract: The tensile fracture of the 3D C/C braided composite structures was studied through the static tensile test and finite element simulation analysis. Three modeling structures including circularly holed, double-edge-semicircle and double- edge-V-shaped specimens were considered for the investigation. The results show that the three open structures in the tensile failure have a strong linear stress-strain relationship and locality stress concentration. At the fixing width of the C/C specimens, the tensile notched strength is not sensitive to size, but it is sensitive to the radius of the notch-tips. The linear elastic failure mechanism can not be applied to the damaged zone of the material, which suggest that a large-scale stress relaxation should exist. The size of the damaged zone increases when the radius of the notch-tips increases, while the size is insensitive to the location of the openings.
- carbon/carbon composites /
- notched strength /
- 3D braided /
- tensile fracture /
- strength analysis