It may reflect the effects of the material and structural properties, loading and boundary conditions, and may be well applied to fit the fatigue data of steels, 30CrNiMo8,4340H and G4335, which are commonly used in ultrahigh pressure vessels.

• 该式不仅考虑了材料的疲劳特性,同时考虑了管道结构和载荷作用情况,当退化为简单试件的疲劳寿命计算式时,能很好地拟合三种常用超高压容器用钢30CrNiMo8、AISI4340H和G4335V的疲劳试验数据。