颗粒尺寸对TiC/AZ91镁基复合材料力学性能的影响

A three-dimensional finite element model of TiC/AZ91 magnesium matrix composites was established, and the influence of the TiC reinforcing particle size on the mechanical properties of TiC/AZ91 magnesium matrix composites during the tensile process was studied by using the ABAQUS finite element software. The results show that: for the TiC/AZ91 magnesium matrix composites with single-sized particles, the failure ratio of TiC particles increases as the size of TiC particles decreases, and the yield strength of the composites decreases as the size of TiC particles increases; for the TiC/AZ91 magnesium matrix composites with mixed-sized particles, the maximum stress on the composites is distributed at the small-sized particles of the material, and the larger the proportion of small-sized particles, the higher the particle failure ratio.

建立了TiC/AZ91镁基复合材料的三维有限元模型,通过ABAQUS有限元软件研究了拉伸过程中TiC增强颗粒尺寸对TiC/AZ91镁基复合材料力学性能的影响。结果表明:对于单一尺寸颗粒TiC/AZ91镁基复合材料,TiC颗粒的失效比随着TiC颗粒尺寸的减小而增大,复合材料的屈服强度随着TiC颗粒尺寸的增大而减小;对于混杂尺寸颗粒的TiC/AZ91镁基复合材料,复合材料所受最大应力分布在该材料的小尺寸颗粒处,小尺寸颗粒所占比例越大,颗粒失效比越高。