薄壁圆管在内压和扭矩作用下的循环响应和疲劳分析

CYCLIC RESPONSE AND FATIGUE ANALYSISS OF THIN CIRCULAR TUBE UNBER INTERNAL PRESSURE AND TORSIONAL MOMENT(1)

在本文(1)中,我们应用Valanis提出的内时本构方程,研究了循环内压下薄壁圆管的塑性响应,得到了循环应力——塑性应变,循环内压——塑性应变的解析公式。由此描绘了碳钢圆管在循环内压下的稳定迟滞回线。这是疲劳寿命估计的依据。

In this paper(1), we use the endochronic constitutive equations proposed by Valanis to study the plastic resposes of thin circular tube under cyclic internal pressure. The analytical formlae of cyclic stress-plastic strain and cyclic internal pressure-plastic strain are obtained. The steady hysteresis loops of stainless circular tube under cyclic internal pressure are described by using previous formulae, which is the basis of estimatng fatigue life.