Investigation on twisting distortion of thin plate stiffened structure under welding

• Published in: Journal of materials processing technology Vol. 212; no. 8; pp. 1705 - 1715
• Main Authors: Wang, Jiangchao, Shibahara, Masakazu, Zhang, Xudong, Murakawa, Hidekazu
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.08.2012
• Subjects: Deformation; Distortion; Elastic analysis; Elastic deformation; Finite element method; Large deformation; Mathematical models; Thermal elastic plastic FEA; Thin plates; Torsional buckling; Twisting; Twisting distortion; Welding; Torsional buckling; Thermal elastic plastic FEA; Twisting distortion; Large deformation; Elastic analysis
• ISSN: 0924-0136
• DOI: 10.1016/j.jmatprotec.2012.03.015

► Twisting distortion caused by welding is observed on thin plate stiffened structure. ► TEP based on ISM is efficient to predict welding distortion. ► Large deformation theory is introduced to study torsional buckling. ► Inherent deformation method is an ideal approach to investigate welding mechanics. The welding distortion of thin plate was selected as research subject, which causes loss of dimensional control, structural integrity and increases fabrication costs for straightening. To study the characteristic of the welding distortion on thin plate structures, experiments were conducted. The test model was a thin plate stiffened structure and a large twisting distortion was observed. The welding distortion of the same structure was analyzed as a large deformation problem using a thermal elastic plastic FEM and an elastic FEM based on the concept of inherent deformation. The computed results by both methods showed the twisting distortion which is a typical buckling type deformation and the magnitude of this distortion agreed well with the experimental measurement.