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隔离栅的组成材料低碳钢在压缩变形后变成鼓形的原因
作者:  来源:  发表时间:2011-08-20 20:02:07  点击:44

隔离栅的组成材料低碳钢在压缩变形后变成鼓形的原因

隔离栅组成材质低碳钢压缩变形的原因是以低碳钢为代表的塑性材料,由于硬度小,富有延展性,抗压强度低,在压缩过程中,当应力小于屈服应力时,其变形情况与拉伸时基本相同;但当达到屈服应力后,试件会产生横向塑性变形,随着压力的继续增加,试件的横截面面积不断变大,同时由于试样两端面与试验机支承垫板间存在摩擦力,约束了这种横向变形,故试样出现显著的鼓胀,呈鼓形。

 

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