摘要
论述了声发射技术在三维编织复合材料拉伸和弯曲过程中的应用以及试验方法,描述了三维编织复合材料拉伸与弯曲过程中声发射的特征。拉伸试验结果表明:编织角小的试件,其应力应变曲线基本为直线,损伤为脆性特征;编织角大的试件,应力应变曲线表现出双线性,各自呈现出脆性破坏特征。弯曲试验表明:小编织角复合材料的载荷挠度曲线保持线性关系;大编织角复合材料的载荷挠度曲线是非线性关系。
This paper discusses the application and experimental method of acoustic emission （AE） for characterizing 3-D braided composite material under tensile and flexural fatigue loading. It describes the features of acoustic emission when applied to 3-D braided composite material under tensile and flexural fatigue loading. The results of tension experiment show the stress-strain curve exhibits linear relation for 3-D braided composite material with smaller surface braided angle and the tensile failure presents brittleness feature. When the surface braided angle is bigger, the stress-strain curve shows bilinear relation and tensile failure presents brittleness damage, respectively. The results of flexural experiment show load-deflection curve is linear relation for 3-D braided composite material with smaller surface braided angle, while the load-deflection curve is nonlinear relation with bigger surface braided angle.
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2007年第4期52-55,59,共5页
Journal of Textile Research
基金
天津市自然科学基金资助项目(043600711)
教育部基金资助项目(03008)
关键词
三维编织
复合材料
声发射
表面编织角
挠度
three-dimensional （3-D） braided
composite material
acoustic emission
surface braided angle
deflection
