Underwater friction stud welding (FRSW) without a shroud around the stud requires controlling welding parameters to achieve optimal joint strength. A hydraulic FRSW unit has been designed and fabricated to perform FRSW without a shroud via a remotely operated underwater vehicle (ROV). An experimental study has been initiated to investigate the optimal FRSW parameter combinations and corresponding values leading to optimal ultimate tensile load capacity (UTLC) values in the welded joint. The engineering robust design (ERD) approach has been deployed to run the experiment. Each weld has been made with a S355 M12 stud on S355 structural steel plate. This paper discusses the experimental approach, results and conclusions reached in the parameter evaluation, estimation, and experimentation.
Underwater Friction Stud Welding Optimal Parameter Estimation: Engineering Robust Design Based Approach
Contributed by the Ocean, Offshore, and Arctic Engineering Division of ASME for publication in the JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received March 4, 2014; final manuscript received August 25, 2014; published online September 25, 2014. Assoc. Editor: John Halkyard.
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Chandima Ratnayake, R. M., Ytterhaug, H. O., Bogwald, P., and Nilsen, S. T. R. (September 25, 2014). "Underwater Friction Stud Welding Optimal Parameter Estimation: Engineering Robust Design Based Approach." ASME. J. Offshore Mech. Arct. Eng. February 2015; 137(1): 011401. https://doi.org/10.1115/1.4028466
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