Indexed by:期刊论文
Date of Publication:2021-02-25
Journal:OPTICS AND LASER TECHNOLOGY
Volume:129
ISSN No.:0030-3992
Key Words:Laser welding; Inversion; Elasto-plastic damage coupling constitutive; Return mapping iterative algorithm; Virtual field method; Digital image correlation
Abstract:The local high temperature of laser welding affects the mechanical damage properties of aluminum alloy. The full-field strain near the weld of the laser-welded aluminum alloy 6061 under uniaxial tension was obtained using digital image correlation. An iterative stress increment method for the isotropically hardened elasto-plastic damage coupling constitutive model is proposed herein based on the combination of a return mapping scheme and the nonlinear virtual field method. The elasto-plastic damage coupling constitutive parameters and its corresponding stress-strain relationship in each subzone around the weld are established. The results show that the plastic strain accumulating in the heat-affected zone is the fastest, where the damage initiation occurs earlier, and the damage evolution speed is faster than that other zones.
Professor
Supervisor of Doctorate Candidates
Supervisor of Master's Candidates
Gender:Male
Alma Mater:Dalian University of Technology (DUT)
Degree:Doctoral Degree
School/Department:State Key Laboratory of Industrial Equipment for Structral Analysis, Department of Engineering Mechanics
Discipline:Solid Mechanics. Applied and Experimental Mechanics. Engineering Mechanics. Mechanical Manufacture and Automation. Vehicle Engineering. Aerospace Mechanics and Engineering. mechanics of manufacturing process
Business Address:Room 321, Department of Engineering Mechanics
Contact Information:Tel.: 86 0411-84708406 Email: leizk@dlut.edu.cn
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