Unified Constitutive Modeling towards Enhanced Structural Integrity

摘要：

　　Design and analysis of critical components in energy (nuclear,solar and fossil power),aerospace,automobile and chemical industries based on detailed inelastic analysis can enhance structural integrity and thereby economy.Especially for the components exposed to very high temperature thermomechanical fatigue loading,unified inelastic analysis based life prediction may enhance accuracy.A unified constitutive model (UCM) with features of strain rate-dependence,static recovery,mean-stress evolution,strain range-dependence,and finally creep damage is developed.The modified UCM is validated against simulating a broad set of strain-controlled isothermal and anisothermal fatigue and fatigue-creep responses,and stress-controlled creep responses of Haynes 230.Some of these results are presented to demonstrate improved simulations by the modified UCM.Importance of damage parameters in improving simulations in the tertiary creep regime is observed.

关键词： Unified constitutive model low-cycle fatigue creep relaxation creep-fatigue multiaxial ratcheting

作者: Tasnim Hassan Raasheduddin Ahmed Paul R.Barrett Nazrul Islam Machel L.Morrison

作者单位: NC State University,2501 Stinson Drive,Raleigh,NC 27607,USA NC State University,2501 Stinson Drive,Raleigh,NC 27607,USA;ANSYS,Inc.,Canonsburg,PA 15317,U.S.A. NC State University,2501 Stinson Drive,Raleigh,NC 27607,USA;Corvid Technologies,Mooresville,NC 28117

会议类型: 国际会议

会议名称: 2016 International Symposium on Structural Integrity，ISSI—2016(2016国际结构完整性研讨会)

会议地点: 天津

会议语种:英文

页码: 127-131

在线出版日期: 2016-05-26（万方平台首次上网日期，不代表论文的发表时间）