Analysis of Specimen Dimensions in Torsion Testing of AISI 1020 Steel using Single Objective Taguchi Method and Multi Objective Grey Relational Analysis
DOI:
https://doi.org/10.51983/arme-2017.6.1.2425Keywords:
Grey Relational Analysis, Modulus of rigidity, Torsion, Ultimate shear stress, Yield shear stressAbstract
The current study aims at investigating the influence of solid specimen dimensions such as total length, useful length, outer diameter and fillet radius on torsion test results of mild (AISI 1020) steel.L9 orthogonal array was selected for design of experiments. Three important output parameters of torsion testing such as modulus of rigidity, yield shear stress and ultimate shear stress were calculated by using Nadai method. Attempt was further made to simultaneously optimize the specimen dimensions using grey relational analysis. The recommended optimized combination based on studied output parameters was found to be total length =162 mm, useful length =50 mm, outer diameter =10 mm and fillet radius =2.5 mm. The confirmation test was also carried out to check the analysis.
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