IMECH-IR  > 先进制造工艺力学重点实验室
Laser-assisted Four Point Bending of Aluminium Sheet
Peng Q(彭青)
Source PublicationLASERS IN ENGINEERING
2018
Volume41Pages:205-217
ISSN0898-1507
Abstract

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%.

KeywordNd:Yag Laser Aa6061-t6 Aluminium Alloy Finite Element Method (Fem) Laser-assisted Four Point Bending Pre-stress Forming Spring-back
Indexed BySCI ; EI
Language英语
WOS IDWOS:000445529800001
ClassificationQ4
Ranking1
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/77656
Collection先进制造工艺力学重点实验室
AffiliationChinese Acad Sci, Inst Mech, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China.
Recommended Citation
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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