天气预报 > 其他 > 梁的正应力是由剪力引起的对吗
梁的正应力是由剪力引起的对吗
更新时间: 2020-10-20 00:00:00  

梁的正应力由该截面的弯矩产生,纯弯曲状态下没有剪力,也有弯曲正应力。有剪力时也会有弯矩,也有正应力。

正应力分布规律:梁弯曲时,存在中性轴,过截面的形心,中性轴上正应力为零,从中性轴向两边,一边受拉应力,一边受压应力,应力是线性变化的,表面处的正应力最大。

关键词: 应力 引起

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