【作者】 刘彩明； 陈旭；

【Author】 LIU Caiming;CHEN Xu;School of Chemical Engineering and Technology,Tianjin University;

【机构】 天津大学化工学院过程装备与控制工程系；

【摘要】 本文研究了Z2CN18.10奥氏体不锈钢弯管在内压和循环载荷下的棘轮-疲劳性能,讨论了弯头外表面4个不同位置的轴向和环向棘轮应变的演化规律。结果发现,在载荷和位移控制下,顶线位置都首先发生破坏,是评估棘轮-疲劳寿命的关键点。随后,基于材料的ε-N曲线和ASME标准对弯管的棘轮-疲劳寿命进行了预测,得到了较好的预测结果。更多还原

【Abstract】 The ratcheting fatigue behavior of Z2 CN18.10 austenitic stainless steel elbow under internal pressure and cyclic loading was studied.The evolution of axial and hoop ratcheting strains at four different locations on the outer surface of the elbow was discussed.The results show that under the control of load and displacement,the first failure occurred at the crown location,which was the key point to evaluate the ratcheting fatigue life.Then,based on the ε-N curve of the material and ASME standard,the ratcheting fatigue life of the elbow was predicted,and good prediction results were obtained.更多还原