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利用ANSYS有限元软件数值模拟不同微观结构的Ti6Al4V/Al_3Ti金属间化合物基层状复合材料的残余应力,分析复合材料层内残余应力分布特征及微观结构参数对层内残余应力的影响。结果表明:Ti6Al4V/Al_3Ti层状复合材料中各层的残余应力在对称中心点处最大,在接近材料边缘处迅速降到最低,各层内残余应力沿界面法线方向无应力梯度变化;在总厚度不变的情况下,通过增加层厚比和层数可改善Ti6Al4V/Al_3Ti金属间化合物基层状复合材料中的残余应力分布,但层厚比对复合材料层内的残余应力影响更为明显。
The residual stress of Ti6Al4V / Al_3Ti intermetallic matrix composites with different microstructures was numerically simulated by ANSYS finite element software. The distribution of residual stress and the effect of microstructure parameters on the residual stress in the composites were analyzed. The results show that the residual stress of each layer in Ti6Al4V / Al_3Ti layered composites is the highest at the center of symmetry, rapidly decreases to the lowest near the edge of the material, and the residual stress in each layer changes without stress gradient along the normal direction of the interface. The residual stress distribution in Ti6Al4V / Al_3Ti intermetallic matrix composites can be improved by increasing the layer thickness ratio and the number of layers. However, the effect of layer thickness ratio on the residual stress in the composites layer is more obvious.