材料断裂伸长率是指试样在拉断时的位移值与原长的比值,以百分比表示(%)。金属材料、非金属材料与复合材料其伸长率差别很大。hrjtest.com;陶瓷类材料伸长率非常低,一般<1%;金属材料断裂伸长率一般1%~50%;热塑性塑料伸长率一般>100%;热固性聚合物伸长率一般<5%;橡胶具有长期弹性伸长率。
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