引張りを受ける有限板の中央切欠きから発生したき裂の応力拡大係数について

概要

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Many literatures have been given for the stress intensity factors of a crack emanating from a hole or notch in infinite or semi infinite body. However, there has been few detailed discussion about applicability of such stress intensity factors for the finite body. In this study, the stress intensity factors of a crack emanating from a U shaped center notch in finite plate are analyzed for various crack lengths and parameters characterizing plate dimensions and notch shape on the bases of the body force method. These results are then compared with those for the center cracked plates. Also, the relationship between the variations of such stress intensity factors and the fatigue crack's behavior are discussed. The stress intensity factor of center cracked specimens can approximate that of center notched specimens with crack when an equivalent crack length is used for calculations in the cases of θ/W<0.1 and c/θ<1, where c, θ and W are crack length measured from notch bottom, notch root radius and semi width of specimen, respectively.
社団法人日本機械学会の論文
2006-07-25