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Most of the endurance tests regarding the strength of diesel engines are intended to examine whether the structural parts can stand more than 107 cycles of gas pressure stress through a long period continuous operation under a certain constant load.<BR>However, the combustion chamber wall is particularly required to stand the combined fatigue strength for the repeated thermal stresses and repeated gas pressure stresses.<BR>Therefore, an endurance test method for the strength of the diesel engine combustion chamber was studied.<BR>And in order to ascertain a method of fatigue life estimation which becomes a basis of the above endurance test, a comparison was made between the results of the engine fatigue test of the cast iron-made piston and cylinder cover and the results of theoretical fatigue life estimation which is based upon a concept of the combined fatigue strength.
公益社団法人日本マリンエンジニアリング学会の論文