复合材料的Ⅲ型动态断裂力学分析

Fracture Mechanics Analysis for Mode III Dynamics ofComposites

本文综合利用Laplace变换和Fourier变换,从理论上分析了含有贯穿裂纹的层合复合材料在动载荷作用下裂纹尖端的Ⅲ型动态应力强度因子。并以冲击载荷为算例,考查了外层的厚度,拉、剪模量的变化对裂纹尖端应力强度因子的影响,为改善复合材料的断裂动力学性能提供了参考依据。

By the comprehensive use of Laplace transform and Fourier transform, in this paper we make a theoretical analysis of stress (9, Continued on p.9) Ontinued from Page p. 15) intensity factors of crack-tip mode III dynamics of laminate composites with through cracks under dynamic load. Taking impact load as an example, we investigate the influence of changingthe outer thickness, tensile modulus and shear modulus on stress intensity factors of crack tip and provide reference for better fracture mechanics properties of composites.