Design of Carbon Pistons Using Transient Heat Transfer and Stress Analyses 2001-01-3217
This work has been carried out as a part of a BRITE European project. The project deals with the design and manufacturing of automotive carbon pistons made out of a new high strength isotropic graphite. This paper presents the technique used to calculate the piston strength and to optimise its shape. A number of finite element analyses were carried out under different load conditions. The stresses due to the combustion gas pressure and inertia loads were combined with thermal stresses, including those due to the warming up and cooling down transients. The comparison between aluminium and carbon materials showed the influence of the thermal conductivity and thermal expansion coefficient on the mechanical performance of the piston.