Abstract
A fuzzy model was presented to predict the weldment shape profile of submerged arc welds (SAW) including the shape of heat affected zone (HAZ). The SAW bead-on-plates were welded by following a full factorial design matrix. The design matrix consisted of three levels of input welding process parameters. The welds were cross-sectioned and etched, and the zones were measured. A map** technique was used to measure the various segments of the weld zones. These mapped zones were used to build a fuzzy logic model. The membership functions of the fuzzy model were chosen for the accurate prediction of the weld zone. The fuzzy model was further tested for a set of test case data. The weld zone predicted by the fuzzy logic model was compared with the experimentally obtained shape profiles and close agreement between the two was noted. The map** technique developed for the weld zones and the fuzzy logic model can be used for on-line control of the SAW process. From the SAW fuzzy logic model an estimation of the fusion and HAZ can also be developed.
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Foundation item: Supported by the IIT Roorkee Project under Grant No. FIG-A Scheme-A
Mr. H. K. Narang was born in 1983. He is currently working as a research scholar at Mechanical and Industrial Engineering Department of IIT Roorkee. His research topic is modeling the effects of open and covered arc welding process parameters on weldment characteristics and distortion.
Dr. M. M. Mahapatra was born in 1970. He is working as assistant professor of Mechanical and Industrial Engineering Department at Indian Institute of Technology, Roorkee. His current research interests include plate forming by line heating, welding deformation, welding residual stress analysis and designing of welded structures.
Dr. P. K. Jha was born in 1971. He is an assistant professor of IIT Roorkee, Dept. of Mechanical and Industrial Engineering. His area of expertise include process modeling, metal casting. He has, to his credit about 25 research publications in journals and conferences.
Dr. Pankaj Biswas was born in 1979. He is an assistant professor of IIT Guwahati, Dept. of Mechanical Engg. His current research interests include manufacturing and design: computational weld mechanics, ship production, line heating, FE structural analysis, etc.
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Narang, H.K., Mahapatra, M.M., Jha, P.K. et al. Development of fuzzy logic system to predict the SAW weldment shape profiles. J. Marine. Sci. Appl. 11, 387–391 (2012). https://doi.org/10.1007/s11804-012-1147-9
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DOI: https://doi.org/10.1007/s11804-012-1147-9