Thermomechanical behavior of the piston of an aircooled diesel engine in semi-permanent mode

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Thermomechanical behavior of the piston of an aircooled diesel engine in semi-permanent mode

Hedhli, T. / Bessrour, J.

Abstract The pistons of the diesel engines are currently used under increasingly high loadings. Crackings are sometimes observed without understanding their causes. This work is one of the studies contributing to the comprehension of the mechanisms at the origin of these problems and their modeling by the identification of the parameters which would make it possible to interpret the causes of these faulty operations. This study has permitted the development of a three-dimensional numerical simulation model of the coupled thermomechanical and dynamic behavior of an air cooled diesel engine piston. This study has particularly led to a realistic description, in semi-permanent mode, fields of temperatures, stresses and strains according to the mode and engine load and to identify the most solicited zones which constitute the zones at risk. The fatigue analysis of the endurance diagrams showed that the piston functions in the case of extreme loadings.