Title: A comparative study on mechanical properties of single- and twin-wire welded joints through multi-objective meta-heuristic optimisation

Authors: Abhay Sharma

Addresses: Department of Mechanical and Aerospace Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, 502285 Telangana, India

Abstract: Multi-objective optimisation of the mechanical properties of single- and twin-wire welded joints is presented. Diversity in functional relation between various mechanical properties and welding process parameters is mapped using artificial neural network modelling. An aggregate index as a function of process parameters is proposed for collective assessment of the mechanical properties namely, ultimate tensile strength, yield strength, % elongation, % reduction in area, impact toughness, fatigue life, and heat affected zone hardness. Optimisation of the aggregate index through simulated annealing indicates existent of multiple near optimum solutions facilitating development of a process window. The quality plots visualising the effects of process parameters on combined mechanical properties suggest superiority of twin-wire over single-wire welding. [Received 30 August 2015; Accepted 24 October 2016]

Keywords: mechanical properties; twin-wire welding; aggregate indexing; artificial neural networks; ANNs; simulated annealing; single-wire welding; welded joints; multi-objective optimisation; metaheuristics; tensile strength; yield strength; elongation; area reduction; impact toughness; fatigue life; heat affected zone; HAZ hardness.

DOI: 10.1504/IJMR.2016.082814

International Journal of Manufacturing Research, 2016 Vol.11 No.4, pp.374 - 393

Accepted: 25 Oct 2016
Published online: 12 Mar 2017 *

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