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Abstract: On the basis of the alternating load function of the thermal load-mechanical load on position of gasoline, the Palmgrem-Mine accumulative invalidation principle is carried out to analyze the characteristic of position failure and test the life of nodes of the piston ring groove bottom using the FE method and the principles of stress amplitude-mean stress distributing and the Palmgrem-Mine
principle. It is showed that the failure of position is the effect of
the alternating thermal load and the alternating mechanical load and
because of super-position of high thermal load and alternating
mechanical load. Expecting the thermal stress and mechanical stress, the
cycle fluctuating thermal stress and creep material and process existing in the first annular groove is also the cause of the failure.
Key words: Piston ring bank Breakage Alternating load Accumulative invalidation
CLC No:
TK412.4
山东省教育厅科技计划资助项目(J06B53). Received 20061029, received in revised form 20070508
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