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对ＳｉＣ颗粒增强铝基复合材料在应变速率为１５０～１０００ｓ－１范围内的冲击拉伸力学性能进行了试验研究，得到了材料从弹塑变形直至断裂的完整的应力应变曲线。结果表明ＳｉＣ颗粒增强铝基复合材料是一种应变率敏感材料，随着应变速率的提高，材料的屈服应力，破坏应力以及破坏应变均相应提高。断口分析表明，ＳｉＣｐ／Ａｌ的破坏形式比较复杂，是一种颗粒的脆性破坏与铝合金基体的韧性破坏共存，强界面与弱界面共存的混合型断口。根据材料在不同应变速率下的试验结果和粘弹塑性本构理论，本文建立了一个反应材料应变率强化相应的一维本构方程。
The mechanical properties of SiC particle reinforced aluminum matrix composite under impact strain rate range of 150-1000s-1 were investigated. The complete stress-strain curve of the material from elastic-plastic deformation to fracture was obtained. The results show that SiC particle reinforced aluminum matrix composite is a strain rate sensitive material. With the increase of strain rate, the yield stress, failure stress and failure strain of the material increase correspondingly. Fracture analysis shows that the failure mode of SiCp / Al is complicated, which is a kind of hybrid fracture with coexistence of brittle fracture of particles and ductile fracture of aluminum alloy matrix and coexistence of strong interface and weak interface. According to the test results of materials under different strain rates and the constitutive theory of viscoelasticity and plasticity, a corresponding one-dimensional constitutive equation of strain rate of reaction material was established.