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stress fatigue
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stress fatigue
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疲劳
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stress fatigue
应力疲劳
在动态载荷作用下,材料或构件承受波动的应力作用时,其某一点或某几点发生局部的、永久性的组织变化的一种递增过程。按照循环应力的大小,疲劳可分为应力疲劳和应变疲劳。在循环应力作用下,若最大循环应力小于屈服应力,则称为应力疲劳,这种情况下作用的循环应力水平较低,寿命循环次数较高,疲劳寿命一般大于104次,故又称高周疲劳。
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