Dynamic response of the temperature and stress fields in an I.C. engine piston

A numerical method is presented for calculating the dynamic response of temperature and thermal stress fields in I.C. engine parts. This method can be used for prevention of thermal failures in I.C. engines, such as thermal shock due to transient changes in load conditions, failure due to excessive thermal stresses, or deformations and metal fatigue. The program calculates the thermodynamic cycle, temperature and stress fields. A marine application was considered in this work and the change in b.m.e.p. and speed of the engine followed the propeller law. The results indicate that a sudden, even small change in power output above the nominal power may cause seizure of the piston due to excessive thermal expansion.