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16. STRESS-STRAIN FAILURE ANALYSIS OF LIGHT-DUTY VEHICLE EXHAUST MATERIALS FOR OPTIMUM SERVICE PERFORMANCE by A.E. Ikpe and I.B. Owunna Transactions of NAMP Volume 10, (July and November, 2019), pp 119 – 126
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STRESS-STRAIN FAILURE ANALYSIS OF LIGHT-DUTY VEHICLE EXHAUST MATERIALS FOR OPTIMUM SERVICE PERFORMANCE by A.E. Ikpe and I.B. Owunna Transactions of NAMP Volume 10, (July and November, 2019), pp 119 – 126

Department of Mechanical Engineering, University of Benin, P.M.B. 1154

Abstract

This paper presents the analysis of different light-duty vehicle exhaust materials and their responses (in terms of stress, strain, displacement, fatigue etc.) to loading factors (temperature, vibration, corrosion etc.) of the exhaust system in service condition .The materials which included Cast Stainless steel, 1.4310 (X10CrNi18-8), Chrome Stainless Steel, Cast Alloy Steel, Stainless Steel Ferritic, Wrought Stainless Steel, Alloy Steel (SS), AISI 316L Stainless Steel and AISI 1020 Low Carbon Steel were analyzed with Solidworks software 2016 version using Finite Element Method (FEM).At maximum temperature of 900oC Chrome Stainless Steel yielded the least Von-mises stress (152,564.258 N/mm^2) and equivalent strain (5.324e-009) followed by 1.4310 (X10CrNi18-8), while AISI 1020 Low Carbon Steel yielded the highest Von-mises stress (197,432.124 N/mm^2) and equivalent strain (7.236e-002). The study also revealed that Von-mises stress and equivalent strain increased as the exhaust temperature increased, thermal fatigue cycle increased as elastic strain increased and the fluctuating stress values increased as the natural frequency increased. Hence, Chrome Stainless Steel and 1.4310 (X10CrNi18-8) is the material of choice for light-duty exhaust systems due to their unyielding strength at extreme temperature, high resistance to corrosion and fatigue failure at high vibration frequency.

Keywords: Vehicle, Exhaust, Materials, Failure, Stress, Strain, Displacement

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