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首页> 外文会议>International Conference on Mechanical Automation and Materials Engineering >Fracture behaviors of the rolled isotactic polypropylene
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Fracture behaviors of the rolled isotactic polypropylene

机译：轧制的全星聚丙烯的断裂行为

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The mechanical properties of the rolled isotactic polypropylene and the morphology of fracture surfaces were measured and observed by tensile tests and the scanning electron microscopy. And then the tensile fracture behaviors along the rolling and transvers directions of the rolled samples were analyzed. After rolling, strong anisotropy mechanical properties occurred along the rolling and transverse directions: high tensile strength with low total elongation along the rolling direction and low tensile strength with high total elongation along the transverse direction. After tensile test, three characteristic structures were found on the fracture surfaces. The tensile fracture behavior of the rolled samples is: stress concentration happens on the edge of tensile sample and then fracture develops to the center part of the tensile sample. When the fracture is big enough, the tensile sample will be failed very quickly.
机译：通过拉伸试验和扫描电子显微镜测量并观察卷绕的全星聚丙烯的机械性能和裂缝表面的形态。然后分析沿轧制样品的轧制和横向方向的拉伸断裂行为。滚动后，沿轧制和横向发生强烈的各向异性机械性能：高抗拉强度，沿滚动方向的总伸长率低，沿横向的总伸长率高的抗拉强度。在拉伸试验之后，在裂缝表面上发现了三种特征结构。卷起样品的拉伸断裂行为是：应力集中在拉伸样品的边缘上发生，然后断裂地发展到拉伸样品的中心部分。当骨折足够大时，拉伸样品将失败很快。

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