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首页> 外文会议>International Conference on Deformation, Yield and Fracture of Polymers; 20000410-20040413; Cambridge; GB >FRACTURE ENERGY INCREASE OF HIGH IMPACT POLYSTYRENE UNDER HIGH STRAIN RATES
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FRACTURE ENERGY INCREASE OF HIGH IMPACT POLYSTYRENE UNDER HIGH STRAIN RATES

机译：高应变率下高抗冲聚苯乙烯的断裂能增加

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摘要

Tensile tests on high impact polystyrene containing salami structured rubber particles with an average diameter of 0.8 μm have been conducted as a function of strain rates from 2.8 x 10~(-3) s~(-1) to 1.8 x 10 s~(-1). It was found that the fracture energy, obtained from force-displacement curves, was increased when the strain rate increased from 1.6 x 10~(-1) s~(-1) to 1.8 x 10 s~(-1). The deformation behaviour was examined using optical microscopy (OM) and transmission electron microscopy (TEM). The microscopic examination suggests that the fracture energy increase under high speed loading was mostly likely caused by the dynamic opening of crazes that occurred only during impact loading and the increase of the number of crazes.
机译：根据平均应变率为2.8 x 10〜（-3）s〜（-1）到1.8 x 10 s〜（-）的应变率，对平均直径为0.8μm的高抗冲聚苯乙烯香肠材料进行了拉伸试验。 1）。结果发现，当应变率从1.6 x 10〜（-1）s〜（-1）增大到1.8 x 10 s〜（-1）时，由力-位移曲线获得的断裂能增加。使用光学显微镜（OM）和透射电子显微镜（TEM）检查变形行为。微观检查表明，高速载荷下的断裂能增加主要是由于仅在冲击载荷下发生的裂纹的动态打开和裂纹数量的增加引起的。

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