Investigation on weld induced distortion using simulation and experimental study / Mohd Shahar Sulaiman

Welding is considered as the most efficient and economical means of fabrication to join metals permanently. However, distortion is frequently encountered as a result of the welding process that adversely affects the dimensional accuracy and aesthetical value leading to costly remedial work and high...

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Main Author:	Sulaiman, Mohd Shahar
Format:	Thesis
Language:	English
Published:	2014
Online Access:	http://ir.uitm.edu.my/id/eprint/17393/ http://ir.uitm.edu.my/id/eprint/17393/2/TM_MOHD%20SHAHAR%20SULAIMAN%20EM%2014_5.pdf

id	uitm-17393
recordtype	eprints
spelling	uitm-173932018-10-25T06:39:36Z http://ir.uitm.edu.my/id/eprint/17393/ Investigation on weld induced distortion using simulation and experimental study / Mohd Shahar Sulaiman Sulaiman, Mohd Shahar Welding is considered as the most efficient and economical means of fabrication to join metals permanently. However, distortion is frequently encountered as a result of the welding process that adversely affects the dimensional accuracy and aesthetical value leading to costly remedial work and high fabrication costs. This research focuses on investigation of welding distortion induced by GMAW process using simulation and experimental study. The investigations started with preliminary studies focusing on butt and T-joints with the thicknesses of 4 mm, 6 mm and 9 mm. FEM software used comprised SYSWELD, PAM-ASSEMBLY and WELD PLANNER. The purposes of these preliminary studies were to investigate the capability of the simulation methods in predicting welding distortions and also to obtain the optimum welding parameters especially for 9 mm butt and T-joints which would be further employed for the major investigations. At the final stage, the research proceeded with the main focus of this study to investigate welding distortion behaviour induced in ship panel structures with 9 mm in thickness by considering different clamping methods. In these cases, the simulation studies were performed using two different simplified simulation methods consisting of local/global approach executed based on the combination of non-linear thermo-elastic-plastic and linear elastic analyses, and shrinkage approach executed based on linear elastic analysis. Low carbon steel material was employed throughout the investigations from the preliminary studies up to the ship panel structures. A series of experiments were carried out for verification purposes by means of fully automated welding processes. When comparing between the predicted and experimental results, it was found out that the simulation methods offered low time consumption in predicting the welding distortions within good accuracy. The average error percentages of the distortion obtained from the investigations on ship panel structures laid in the range between 7 to 28 percent. The computational time required by both approaches was about 30 minutes compared to experiments which were completed within 12 hours. Besides, the clamping conditions were confirmed to have the influence on the distortion behaviour. 2014 Thesis NonPeerReviewed text en http://ir.uitm.edu.my/id/eprint/17393/2/TM_MOHD%20SHAHAR%20SULAIMAN%20EM%2014_5.pdf Sulaiman, Mohd Shahar (2014) Investigation on weld induced distortion using simulation and experimental study / Mohd Shahar Sulaiman. Masters thesis, Universiti Teknologi MARA.
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Teknologi MARA
building	UiTM Institutional Repository
collection	Online Access
language	English
description	Welding is considered as the most efficient and economical means of fabrication to join metals permanently. However, distortion is frequently encountered as a result of the welding process that adversely affects the dimensional accuracy and aesthetical value leading to costly remedial work and high fabrication costs. This research focuses on investigation of welding distortion induced by GMAW process using simulation and experimental study. The investigations started with preliminary studies focusing on butt and T-joints with the thicknesses of 4 mm, 6 mm and 9 mm. FEM software used comprised SYSWELD, PAM-ASSEMBLY and WELD PLANNER. The purposes of these preliminary studies were to investigate the capability of the simulation methods in predicting welding distortions and also to obtain the optimum welding parameters especially for 9 mm butt and T-joints which would be further employed for the major investigations. At the final stage, the research proceeded with the main focus of this study to investigate welding distortion behaviour induced in ship panel structures with 9 mm in thickness by considering different clamping methods. In these cases, the simulation studies were performed using two different simplified simulation methods consisting of local/global approach executed based on the combination of non-linear thermo-elastic-plastic and linear elastic analyses, and shrinkage approach executed based on linear elastic analysis. Low carbon steel material was employed throughout the investigations from the preliminary studies up to the ship panel structures. A series of experiments were carried out for verification purposes by means of fully automated welding processes. When comparing between the predicted and experimental results, it was found out that the simulation methods offered low time consumption in predicting the welding distortions within good accuracy. The average error percentages of the distortion obtained from the investigations on ship panel structures laid in the range between 7 to 28 percent. The computational time required by both approaches was about 30 minutes compared to experiments which were completed within 12 hours. Besides, the clamping conditions were confirmed to have the influence on the distortion behaviour.
format	Thesis
author	Sulaiman, Mohd Shahar
spellingShingle	Sulaiman, Mohd Shahar Investigation on weld induced distortion using simulation and experimental study / Mohd Shahar Sulaiman
author_facet	Sulaiman, Mohd Shahar
author_sort	Sulaiman, Mohd Shahar
title	Investigation on weld induced distortion using simulation and experimental study / Mohd Shahar Sulaiman
title_short	Investigation on weld induced distortion using simulation and experimental study / Mohd Shahar Sulaiman
title_full	Investigation on weld induced distortion using simulation and experimental study / Mohd Shahar Sulaiman
title_fullStr	Investigation on weld induced distortion using simulation and experimental study / Mohd Shahar Sulaiman
title_full_unstemmed	Investigation on weld induced distortion using simulation and experimental study / Mohd Shahar Sulaiman
title_sort	investigation on weld induced distortion using simulation and experimental study / mohd shahar sulaiman
publishDate	2014
url	http://ir.uitm.edu.my/id/eprint/17393/ http://ir.uitm.edu.my/id/eprint/17393/2/TM_MOHD%20SHAHAR%20SULAIMAN%20EM%2014_5.pdf
first_indexed	2023-09-18T22:58:13Z
last_indexed	2023-09-18T22:58:13Z
_version_	1777417996825788416

Investigation on weld induced distortion using simulation and experimental study / Mohd Shahar Sulaiman

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