一、绪言图1所示的膨胀节在压力容器和管路中是经常见到的。作者曾在以前的论文中,对处于内压和轴向载荷下的膨胀节的弹性分析做过论述。由于膨胀节常常是处在反复载荷的 I. INTRODUCTION The expansion joint shown in Figure 1 is often seen in pressure vessels and piping. In previous papers, the author discussed the elastic analysis of expansion joints under internal pressure and axial load. As the expansion joint is often in the repeated load