Fatigue Strength Evaluation of Cracked Components

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概要

• 論文の詳細を見る

• Fatigue crack propagation behavior was investigated using structural carbon steel specimens which have single edge or small surface pre-cracks. The crack closure behavior of small surface cracks was dynamically measured by using an interferometric displacement gage with a laser diode. The threshold condition for crack initiation from pre-cracks was given by the effective stress intensity range obtained for long cracks. The crack opening stress intensity factor increased with crack growth. The threshold crack opening stress intensity factor was formulated as a function of the ratio of the applied stress to the yield stress and the increment of crack length. The cyclic R-curve was constructed in terms of the experimentally determined threshold value of the maximum stress intensity factor which was the sum of the range of the threshold effective stress intensity and the crack opening stress intensity factor. The cyclic R-curve method was used to predict the fatigue thresholds of the pre-cracked components. The predicted values of the fatigue limit for crack initiation, the fatigue limit for fracture, and the length of non-propagating cracks agreed well with the experimental results

• 一般社団法人日本機械学会の論文
• 1997-10-15

著者

• TANAKA Keisuke

  Department of Mathematical and Computing Sciences, Tokyo Institute of Technology

• AKINIWA Yoshiaki

  Department of Mechanical Engineering, Nagoya University

• Tanaka Keisuke

  Department Of Cardiovascular Surgery Nagoya Daini Red Cross Hospital

• Zhang Long

  Engine Research Department Isuzu Advanced Engineering Center Ltd.

• ZHANG Luoming

  Department of Mechanical Engineering, Nagoya University

• Akiniwa Yoshiaki

  Department Of Engineering Science Kyoto University

• Zhang Luoming

  School Of Mechanical Engineering Zhengzhou Univ.

• Tanaka Keisuke

  Department Of Biochemistry Faculty Of Veterinary Medicine Hokkaido University

• Tanaka Keisuke

  Department Of Applied Chemistry Waseda University

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