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STRUCTURAL AND THERMAL ANALYSIS OF EXHAUST VALVE OF DIFFERENT MATERIALS USING FINITE ELEMENT METHODS

Abstract

Abstract: In engines, valves are essential components for better working of the engine. The Intake and exhaust valves are used to control the flow and exchange of gases. These valves seal the working space inside the cylinder against the manifolds and are opened and closed with the valve train mechanism. Smooth-running of an internal combustion engine is possible because of the exhaust valve. The role of the exhaust valve is to pass on the exhaust gases to the exhaust manifold from the combustion chamber. During the internal combustion engine operation, exhaust valves are subjected to the axial stresses due to exhaust gas pressure, cyclic stresses due to return spring load, thermal stresses due to very high temperature inside the combustion chamber, and inertia forces arising on the account of the valve assembly. This project aims to design and do the static and thermal analysis of the poppet valve used in CI engines. Modeling of the valve was done with the help of Catia V5 and staticthermal analysis was carried out in the ANSYS Workbench. Here we are using four materials i.e, Ti-4.5Al-3V-2Fe-2Mo, Silicon Nitride (Si3N4), AISI 4340 and, NIMONIC 80A. Aluminum alloy (A356) is used as a standard exhaust valve material for comparison. Post comparison we finally suggest the best material for the exhaust valve.Keywords: Exhaust valve, Finite element analysis, Design analysis, Catia V5, Ansys Workbench.

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@AMITY SCHOOL OF ENGINEERING & TECHNOLOGY

Department of Civil Engineering, Amity University Haryana,




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