Firstly, according to analyze the fatigue test result of the normalized carbon steel, a logarithmic expression is developed to describe residual strength degradation process, the definition and expression of fatigue damage under symmetrical stress with co
Firstly, according to analyze the fatigue test result of the normalized carbon steel, a logarithmic expression is developed to describe residual strength degradation process, the definition and expression of fatigue damage under symmetrical stress with co
摘要通过对正火45钢的试验数据分析，提出了一个反映剩余强度退化的对数表达式，给出对称恒幅应力循环下疲劳损伤的定义与表达式。