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剪切应变(shear strain)[1]是材料力学中的名词,定义为一微小材料元素承受剪应力时所产生的角变形量。因此是一个无量纲(dimensionless)的物理量。公式记为
其中 是剪切应变, 是材料元素的高度, 是承受剪应力的变形量。
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