Please use this identifier to cite or link to this item: http://hdl.handle.net/10603/11553
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dc.coverage.spatialen_US
dc.date.accessioned2013-09-27T12:06:45Z-
dc.date.available2013-09-27T12:06:45Z-
dc.date.issued2013-09-27-
dc.identifier.urihttp://hdl.handle.net/10603/11553-
dc.description.abstractIt is a well known fact that fusion welding is being extensively used in a wide spectrum of fabrication industries. Keeping in line with this objective, 3D finite element simulation of Gas Metal Arc Welding (GMAW) of a carbon steel T-joint was performed to predict the longitudinal residual stress field in the joint. Besides, the finite element prediction of residual stresses was validated with the residual stresses obtained by the contour method. With the validated 3D finite element model, distortions in the T-joint were computed on the basis of Design of Experiments (DOE), by keeping the GMAW primary process parameters such as welding current, arc voltage and welding speed at various operating levels. A regression model of maximum distortion in the T-joint was then developed, after conducting standard statistical tests to check the adequacy of the regression model in prediction of maximum distortion.. The fillet weld was divided into three step welding sequences on each side of the T-joint for the purpose of optimizing the welding sequence for minimum distortion. Out of all the possible combinations, 2304 sequences were heuristically selected, with the GMAW process conditions maintained at the optimum level. After dividing these 2304 sequences into 6 groups for systematic running of simulations, distortion of T-joint was computed for each welding sequence. An artificial neural network (ANN) model was trained by selecting 50 % of the distortion data obtained by finite element simulation. The minimum distortion predicted by ANN model was found to be in close agreement with that predicted by finite element simulation. It was found that optimization of both the GMAW process parameters and the welding sequence resulted in the overall reduction of the maximum distortion in the T-joint to the extent of 35.86%. This will result in even higher reduction of distortion in the case of relatively larger welded structures newlineen_US
dc.format.extentxix, 150en_US
dc.languageEnglishen_US
dc.relation90en_US
dc.rightsuniversityen_US
dc.titleFinite element simulation of residual stresses and optimization of welding sequence to minimize distortion in a GMA welded carbon steel T jointen_US
dc.title.alternativeen_US
dc.creator.researcherNarayanan Ren_US
dc.subject.keywordFinite element simulation, residual stresses, optimization, welding sequence, carbon steel T jointen_US
dc.description.noteAppendices 1 to 12; pp.109-139en_US
dc.contributor.guideSelladurai, V.en_US
dc.publisher.placeChennaien_US
dc.publisher.universityAnna Universityen_US
dc.publisher.institutionFaculty of Mechanical Engineeringen_US
dc.date.registered1, April 2010en_US
dc.date.completeden_US
dc.date.awardeden_US
dc.format.dimensions23.5 cm x 15 cmen_US
dc.format.accompanyingmaterialNoneen_US
dc.source.universityUniversityen_US
dc.type.degreePh.D.en_US
Appears in Departments:Faculty of Mechanical Engineering

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01_title.pdfAttached File32.25 kBAdobe PDFView/Open
02_certificates.pdf583.69 kBAdobe PDFView/Open
03_abstract.pdf18.72 kBAdobe PDFView/Open
04_acknowledgement.pdf15.4 kBAdobe PDFView/Open
05_contents.pdf91.34 kBAdobe PDFView/Open
06_chapter 1.pdf61 kBAdobe PDFView/Open
07_chapter 2.pdf290.14 kBAdobe PDFView/Open
08_chapter 3.pdf643.04 kBAdobe PDFView/Open
09_chapter 4.pdf706.07 kBAdobe PDFView/Open
10_chapter 5.pdf566.89 kBAdobe PDFView/Open
11_chapter 6.pdf362.03 kBAdobe PDFView/Open
12_chapter 7.pdf44 kBAdobe PDFView/Open
13_appendices 1 to 12.pdf540.64 kBAdobe PDFView/Open
14_references.pdf90.24 kBAdobe PDFView/Open
15_publications.pdf37.44 kBAdobe PDFView/Open
16_vitae.pdf30.23 kBAdobe PDFView/Open


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