短纤维增强金属基复合材料应力分布的剪切滞后分析

SHEAR LAG ANALYSIS OF STRESS DISTRIBUTION OF SHORT FIBER REINFORCED METAL MATRIX COMPOSITES

使用弹性理论和剪切滞后分析，推导出了基体和纤维应力场分布表达式，研究了纤维体积分数、纤维长径比和基体屈服强度等对应力分布和应力传递的影响。研究表明，基体和纤维应力分布及基体的塑性行为具有明显的不均匀性，基体与纤维之间存在明显的应力传递和应变分配。

The expressions for the stress field distributions in the matrix and the fiber were derived using the theory of elasticity and the shear lag theory. The effects of fiber volume fraction, fiber aspect ratio and matrix yield strength on the stress distributions and the stress transfer were investigated. It is shown that the stress distributions in the matrix and the fiber and the plastic behavior in the matrix are of significant non uniformity; there are significant stress transfer from the matrix to the fiber and the partition between the matrix and the fiber.