Meso-damage modeling of aluminum alloy welded joint under thermal cycling condition
Mechanical properties deterioration and meso-damage mechanism of 5A06 aluminum alloy welded joint under thermal cycling condition were investigated. Microstructral and Fractographic observation demonstrate that void nucleation around the second phase particles is the dominant factor for macroscopic performance decrease. The techniques of physical simulation and image analysis were applied respectively to determine the macro mechanical properties and meso-damage parameters of the different parts of the welded joint. A modified Gurson void nucleation model was presented to characterize the effect of thermal stress assisted voiding based on the micromechanical analysis of a cell model. This model was successfully implemented in the finite element code to describe the void-damage evolution of the welded joint under thermal cycling conditions.
Thermal cycling Welded joints Void damage Void nucleation Gurson model
Cheng Jin Jitai Niu Shiyu He Chengbin Fu
School of Materials Science and Engineering, Harbin Institute of Technology, 436 Mailbox,Harbin Heilongjiang 150001, People’s Republic of China
国际会议
郑州
英文
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）