弥散复合材料弹性模量及弹性渗流失效

THE EFFECTIVE ELASTICITY MODULUS OF THE GRANULAR COMPO -SITE AND THE ELASTIC PERCOLATION FAILURE OF SOLIDS

1.引言 弥散复合材料有效弹性模量的研究是一个极为重要的课题。它不但属于复合材料力学性能的研究范畴,而且对于材料弹性失效及其失效阈值等问题的研究也是必不可少的。 材料的弹性渗流失效是材料失效的一个基本类型。由于完整材料的弹性模量总是远大于零的有限值,而空洞等作为第二相时,其弹性模量可视为零。因此。

Expressions for calculating the effective elasticity modulus of the granular composite are developed based on the solution of the overmatching problem in elastic mechanics. Then, systems with 2 phases are considered and 2 typical examples are dealt with. As is shown, the predicted results is in good agreement with the results given in literature. Furthermore, taking the voids in materials as the second phase with zero elasticity modulus, one can easily obtain the elastic percolation failure phenomenon and the threshold of failure. It is found that the value of the threshold of the elastic percolation failure given in this paper agrees well with the results given by other.