三维编织复合材料压缩损伤声发射特性分析

论述了声发射技术在三维编织复合材料压缩过程中的应用及实验方法,给出了声发射在三维编织复合材料中压缩过程的特征。结果表明,声发射参数可描述复合材料在不同情况下内部变形的损伤机制。表面编织角是影响三维编织复合材料力学性能的主要参数,编织角小于30°,三维编织复合材料具有较好的压缩性能;编织角大于40°,三维编织复合材料压缩力学性能明显降低。为分析复合材料的力学性能,改善材料复合工艺提供理论基础。

Feature of acoustic emission and failure analysis for three-dimensional braided composite material under compressive load

This paper describes the application and experimental method of acoustic emission(AE) for three-dimensional(3-D) braided composite material under compressive fatigue loading and presents the features of acoustic emission during compressive test process for(three-)dimensional braided composite material.The experiment results show that the AE parameters can elaborate the failure mechanism of inner deformation of the three-dimensional braided composite material under different conditions.The surface braided angle is an important parameter affecting the mechanical properties of the three-dimensional braided composite material.When the braided angle is less than 30 degree,it has better compressive property;and when the braided angle is larger than 40 degree,its compressive property shows remarkably declined.The research has provided a theoretical basis for mechanics analysis and technique improvement of the composite material.