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金属材料冷变形时预应变增强效应与损伤效应浅析

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摘要 从残余应力与分子力的变化 2个方面分析了预应变的增强效应和损伤效应的原因。预应变产生的附加内力及残余压应力是其提高疲劳抗力的原因 ;当预应变水平较低时 ,增强效应占优 ,有利于提高疲劳寿命 ;反之 ,损伤效应是主要的 ,将导致疲劳寿命降低。
出处 《机械研究与应用》 2000年第1期16-16,19,共2页 Mechanical Research & Application
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