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Laser-assisted Four Point Bending of Aluminium Sheet
Peng Q(彭青)
2018
发表期刊LASERS IN ENGINEERING
卷号41页码:205-217
ISSN0898-1507
摘要

Laser-assisted pre-stress forming is a technology for the manufacturing an integrally stiffened panel. To investigate the thermo-mechanical mechanism for such forming method, experiment on laser-assisted four-point bending an AA6061-T6 aluminium alloy sheet is carried out. A three-dimensional (3-D) finite element method (FEM) simulation is conducted and verified with the experiment in aspects of both temperature histories and force-displacement curve. During forming process, the sample is bent via four point bending elastically and then heated with a continuous wave (CW) Nd: YAG laser system in a controllable manner. Since material yield strength decreases with an increasing temperature locally, pre-loaded elastic strain is partially converted into plastic strain, and elastic strain energy is dissipated into plastic work. In this paper, the forming mechanism is studied by analysing the coupled thermo-structural field. According to the final shape by simulation, the spring-back ratio is 78.0% (76.0% by experiment), and the energy dissipation rate is 33.5%.

关键词Nd:Yag Laser Aa6061-t6 Aluminium Alloy Finite Element Method (Fem) Laser-assisted Four Point Bending Pre-stress Forming Spring-back
收录类别SCI ; EI
语种英语
WOS记录号WOS:000445529800001
论文分区Q4
力学所作者排名1
引用统计
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77656
专题流固耦合系统力学重点实验室
作者单位Chinese Acad Sci, Inst Mech, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China.
推荐引用方式
GB/T 7714
Peng Q. Laser-assisted Four Point Bending of Aluminium Sheet[J]. LASERS IN ENGINEERING,2018,41:205-217.
APA Peng Q.(2018).Laser-assisted Four Point Bending of Aluminium Sheet.LASERS IN ENGINEERING,41,205-217.
MLA Peng Q."Laser-assisted Four Point Bending of Aluminium Sheet".LASERS IN ENGINEERING 41(2018):205-217.
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