对高体积分数碳化硅颗粒增强铝基(SiCP/Al)复合材料的拉伸强度进行了试验研究.发现在较高应力水平下经过2次卸载的试件与未做卸载的试件相比,拉伸强度变化很小,说明加载-卸载过程对材料的拉伸强度影响不大.在试验研究的基础上,使用ANSYS软件建立了有限元模型,对SiCP/Al复合材料的拉伸特性进行了仿真模拟.研究结果表明,低体积分数SiCP/Al复合材料的力学性能更接近塑性材料;而高体积分数SiCP/Al复合材料的力学性能则接近于脆性材料.拉伸强度模拟计算误差非常小,基体破坏是导致高体积分数SiCP/Al复合材料破坏的主要因素.
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