摘要
通过低周拉压疲劳实验,建立了用循环塑性应变幅计算循环塑性应变能密度的关系式、循环疲劳寿命与循环塑性应变能密度之间及疲劳破坏总塑性应变能密度与循环疲劳寿命间的关系式。最后以塑性应变能密度为基础,得到低周拉压疲劳的非线性累积损伤表达式。
Through the low cycle tensile and compressive fatigue experiments,it was obtained the relationship between the cyclic plastic strain amplitude and the cyclic plastic strain energy density ,the cyclic fatigue life and the cyclic plastic strain energy density,the fatigue crack gross plastic strain energy density and the cyclic fatigue life. At last,this paper obtained the nonlinear cumulative damage formula of the low cycle tensile and compressive fatigue on the basis of the plastic strain energy density.
出处
《机械强度》
CAS
CSCD
北大核心
1993年第3期66-67,共2页
Journal of Mechanical Strength
