Autofrettage and shakedown of thick cylinders under thermal and mechanical loads

摘要：

The optimum autofrettage pressure of power strain-hardening cylinders under constant thermo-mechanical Loadings in plane strain is studied theoretically and validated by finite element (FE) method.In addition,the effect of autofrettage on shakedown behavior of thick cylinders subjected to constant internal pressure and cyclic thermal loads is discussed.Results show that the analytical solutions of the optimum autofrettage pressure are in good agreement with FE results.Under thermo-mechanical loadings,autofrettage of strain hardening cylinders influences elastic shakedown boundaries slightly in Bree diagram and enhances the carrying capacity when the autofrettage pressure is lower than plastic-limit pressure.

关键词： Autofrettage Thick-walled cylinder Shakedown Bree diagram

作者: Xiaotao Zheng Fu-Zhen Xuan

作者单位: MOE Key Lab.of Safety Science of Pressurized System,East China University of Science and Technology,Shanghai 200237,China

会议类型: 国际会议

会议名称: 国际断裂力学2009年会

会议地点: 成都

会议语种:英文

页码: 569-573

在线出版日期: 2009-10-16（万方平台首次上网日期，不代表论文的发表时间）