Title: The deformation and residual stress simulation of dual laser-beam bilateral synchronous welding for Al-alloy aircraft panel structure

Authors: Xiaohong Zhan; Yun Liu; Yao Meng; Wenmin Ou; Yanhong Wei

Addresses: College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China ' College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China ' College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China ' College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China ' College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China

Abstract: This paper reports a numerical investigation of dual laser-beam bilateral synchronous welding (DLBSW) for T-joint structure of aircraft fuselage. Finite element numerical simulation of DLBSW is carried out to obtain suitable matching of welding parameters for civil aircraft panels which composed of 6156 aluminium alloy skin and 6056 aluminium alloy stringer. The distribution of welding residual stress and welding distortion on the aircraft panels are predicted and discussed. Three-dimensional finite element model of the panel containing three stringers has been developed to simulate the temperature field, residual stress distribution and welded panel distortion. It is simulated that three stringers are welded to base plate of the specimen through different welding sequences and the welding sequence with the smallest distortion is acquired.

Keywords: aluminium; numerical simulation; aircraft panel.

DOI: 10.1504/IJCMSSE.2019.10023923

International Journal of Computational Materials Science and Surface Engineering, 2019 Vol.8 No.2, pp.100 - 113

Accepted: 19 Nov 2018
Published online: 16 Sep 2019 *

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