S0301-6-3 有限要素解析による機関運転中のシリンダブロックトップデッキ隅部の応力と疲労強度に関する検討(溶接継手と疲労評価法)

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  • S0301-6-3 Study on Stress along the Fillet on Upper Deck of Cylinder Block during Operation and Fatigue Strength by Finite Element Analysis

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The static stress by tightening cylinder head bolts and the stress in operation were calculated by using finite element analysis along the fillet on an upper deck of cylinder block with wet liner structure. The stress was calculated based on dynamic balance of cylinder block and its stiffness ratio to cylinder head bolt. The stress distribution before and during operation evaluated by finite element analysis corresponded to the measurement results. The fatigue strength was examined by plotting the stress amplitude and the mean stress on the fatigue limit diagram. The results corresponded to the presence or absence of crack along the fillet of test and prototype engines well.

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