DYNAMIC INTERACTION BETWEEN INHOMOGENEITIES IN ADVANCED COMPOSITE MATERIALS
The development in advanced composite materials has resulted in the resurgence of interest in the interaction between cracks and inhomogeneities.This interest stems mainly from the desire to characterize the modes of failure resulting from the interaction between microcracks,inclusions and microvoids.The quasistatic interaction between a crack and microdefects has been extensively investigated using both the continuum damage mechanics model and the discrete micromechanical model1,2.However,existing studies accounting for the dynamic interaction between microdefects have been limited to simplified problems. The primary objective of the current work is to provide a comprehensive micromechanical model for treating the elastodynamic interaction between a main defect and arbitrarily located and oriented microdefects in tbrms of cracks and inhomogeneities.The formulations governing the steady-state dynamic interaction problem are simplified by the use of the fundamental solution for one inhomogeneity and a pseudo-incident wave method3.Closed form expressions are derived for the dynamic stress intensity factors in terms of the size,location and orientation of the different microdefects.Numerical examples are provided to show the effect of the location and orientation of the microdefects and the frequency of the incident wave upon the dynamic stress intensity factors of the main crack.
X.D.Wang
Department of Mechanical Engineering,University of Alberta,Alberta,Canada T6G 3G8
国际会议
第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)
安徽黄山
英文
999-1000
2008-06-03（万方平台首次上网日期，不代表论文的发表时间）