通过室温下的仪器化冲击试验和静态拉伸试验，研究一种低屈服比高强度钢板在冲击载荷下的力学性能和断裂机理。

Mechanical properties and fracture mechanism of high strength steel sheet with low yield ratio under impact loading have been studied through instrumented impact and quasi-static tensile tests.

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结果表明：PVC的拉伸屈服强度随外力作用速度的提高而提高，断裂伸长率却随之下降。

The results showed that with the the increase of outside force velocity, the tension yield strength of PVC increased, but its breaking elongation decreased.

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采用拉伸屈服强度定量表征了界面相互作用的强弱，研究了界面相互作用对三元复合体系拉伸断裂形态的影响。

Tensile yield strength was used to quantitatively evaluate the interfacial interactions, which have significant influence on the tensile fracture morphology of the composites.

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