颗粒增强铁基复合材料拉伸应力场数值分析

Finite Element Micro-numerical Analysis of Tensile Stress Field in Particle Reinforced Iron Matrix Composites

采用有限元方法分析了颗粒增强铁基复合材料强度和应力与颗粒形状、尺寸以及体积分数的关系。结果表明,颗粒尖锐化会导致颗粒尖端应力集中和基体内的应变集中。同时,颗粒长径比增大,颗粒的应力集中也增大;颗粒尺寸减小和体积分数增加都有助于提高复合材料的强度。

The finite element method is used to analyze the relationship between strength and stress of the particle reinforced iron matrix composites and the shapes,sizes and fraction volume of the particles.The results show that the acumination of the particle can result in stress concentration of the particle tip and strain concentration in the matrix.Meanwhile,the stress concentration increases with increasing in length-diameter ratio.The reduction of the particle size and the increase of the fraction volume are helpful to improving the strength of the composites.