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Non-Equilibrium Statistical Model About the Fatigue Life of Polycrystalline Metals
Author(s): 
Pages: 533-535,568
Year: Issue:  5
Journal: TRANSACTIONS OF BEIJING INSTITUTE OF TECHNOLOGY

Keyword:  疲劳寿命晶粒尺寸非平衡统计理论界面能模型应力振幅;
Abstract: 为了研究晶粒尺寸对多晶体金属疲劳寿命的影响,基于疲劳断裂非平衡统计理论和界面能模型,导出了多晶体金属的疲劳寿命随晶粒尺寸和应力振幅的变化公式.在其它参数保持不变的情况下,得出细晶粒多晶体金属的平均疲劳寿命随晶粒尺寸和应力振幅的增加而减小的结论.并对2种特定细晶粒多晶体材料的晶粒尺寸和应力振幅对疲劳寿命影响的理论结果与实验结果进行了比较.结果表明所得理论与实验结果比较吻合.
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