Evaluation of the J-Integral Range of Fatigue Crack Emanating from Notches by Simple Estimation Formulae
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概要
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In a previous paper, the present authors discussed the path-integral expression of the J-integral range, for short fatigue cracks emanating from notches, and showed thatΔJ evaluated based on the crack-opening level was an appropriate parameter for characterizing the near-tip stress and strain fields. In this study, finite-element simulations of fatigue crack growth from notches were conducted. The values ofΔJ evaluated by the path-integral were compared with those estimated by E1 Haddad's simple estimation formula proposed for short fatigue cracks at notches, and with those estimated by Dowling's formula for deep cracks and by Cho's formula for short cracks at notches. The ΔJ values evaluated by E1 Haddad's formula did not agree well with the values of ΔJ evaluated by the path-integral. In contrast, the ΔJ values evaluated by Dowling's formula based on the crack opening level agreed well with the ΔJ values evaluated by the path-integral.
- 一般社団法人日本機械学会の論文
- 1995-01-15
著者
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Kacou T.a.p.
Department Of Mechanical Engineering Osaka University
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Ohji K
Department Of Mechanical Engineering And Systems Graduate School Of Engineering Osaka University
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Ohji Kiyotsugu
Department Of Mechanical Engineering Faculty Of Engineering Osaka University
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KUBO Shiro
Department of Mechanical Engineering and Systems, Graduate School of Engineering, Osaka University
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Kubo Shiro
Department Of Mechanical Engineering And Systems Graduate School Of Engineering Osaka University
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Yafuso Tateki
Department of Mechanical Systems Engineering, University of the Ryukyus
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Itokazu Masaya
Department of Mechanical Systems Engineering, University of the Ryukyus
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Yafuso Tateki
Department Of Mechanical Systems Engineering University Of The Ryukyus
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Itokazu Masaya
Department Of Mechanical Systems Engineering University Of The Ryukyus
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Ohji Kiyotsugu
Department of Mechanical Engineering and Systems, Graduate School of Engineering, Osaka University
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