Failure Analysis of Diesel Engine Exhaust Valve by Using Ansys Software

Abstract:

The failure of valve affects the engine performance and as a result importance is given to the failure analysis of internal combustion engine valves. The valve may fail by valve face recession, wear failure, fatigue failure, thermal fatigue, erosion / corrosion of valves, overheating of valves and carbon deposits on valves. Mostly valves fail due to high pressure and temperature. This paper presents a failure analysis of diesel engine exhaust valve used in a passenger car. The analyzed exhaust valve failed after a very short period of usage of the car. To determine the cause of failure stress analysis is carried out by finite element method which shows the highly stressed region on the valve. A proper CAD model is developed by using CATIA software and saved in 'iges' format. It is then imported into ANSYS 14 software which gives the von mises stress, strain and deformation. The stress analysis shows that maximum stress is developed near the head of valve when piston crashed to the valve and material analysis shows that the strength of valve decreases due to decarburization of material and as a result the valve was bent.

• Periodical: Applied Mechanics and Materials (Volumes 592-594)
• Pages: 1070-1074
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.592-594.1070
• Online since: July 2014
• Authors: Manoj Kumar Yadav*, Vinod Kumar Mittal, Surjit Angra
• Keywords: Bend Analysis, Diesel Engine, Exhaust Valve, Stress Analysis

References

[1] M. Azadi, M. Roozban, A. Mafi, in: Failure analysis of an intake valve in a gasoline engine, The Journal of Engine Research, Vol. 26 (spring 2012), pp.03-09.

[2] Z.W. Yu, X.L. Xu, in: Failure analysis and metallurgical investigation of diesel engine exhaust valves, Institute of Metal and Technology, Dalian Maritime University, Dalian 116026, PR China Engineering Failure Analysis 13 (2006) 673–682.

DOI: 10.1016/j.engfailanal.2004.10.018

[3] Oh Geon Kwon, Moon Sik Han, in: Failure analysis of the exhaust valve stem from a Waukesha P9390 GSI gas engine, Engineering Failure Analysis 11 (2004) 439M47.

DOI: 10.1016/j.engfailanal.2003.05.015

[4] H. J. C. Voorwald, R. C. Coisse, M. O. H. Cioffi, in: Fatigue Strength of X45CrSi93 stainless steel applied as internal combustion engine valves, Fatigue and aeronautic material research group, Procedia Engineering 10 (2011) 1256–1261.

DOI: 10.1016/j.proeng.2011.04.209

[5] H. Bayrakceken, I. Ucun, S. Tasgetiren, in: Fracture analysis of a camshaft made from nodular cast iron, Engineering Failure Analysis 13 (2006) 1240–1245.

DOI: 10.1016/j.engfailanal.2005.11.001

[6] ANSYS 14. 0 Workbench.

[7] CATIA V5 –R19 manual.

[8] Information on http: /www. matweb. com.