摘要
在疲劳断裂非平衡统计理论框架的基础上 ,根据界面能模型 ,推导出了多晶体金属的疲劳寿命随晶粒尺寸、应变振幅的变化公式 .还与有关实验结果进行了比较 ,发现理论与实验较为相符 .
In order to explore the effect of grain size on fatigue life, a formula of fatigue life for polycrystalline metals I which depends on the grain size and cyclic strain amplitude, is derived based on the non-equilibrium statistical theory of fatigue fracture and the model of interface energy. Subsequently, the fatigue lifes of pure copper and 70-30 brass with different grain sizes are calculated according to the formula which is achieved in this paper, and the results are in agreement with the experimental results.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2003年第8期2092-2095,共4页
Acta Physica Sinica
