材料力学部門講演会講演論文集
Online ISSN : 2433-1287
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424 構造部材の完全圧縮疲労負荷時のき裂進展
笠場 孝一片桐 一宗野口 一成正路 良孝
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p. 319-320

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Fatigue crack growth behaviors in weld components under compressive cyclic loading were studied. The crack growth rate not only under tensile cyclic loading but also under compressive one can be described quantitatively by the reverse plastic zone size at the crack tip. The reverse plastic zone size was calculated by finite element method taking initial weld residual stress and crack closure into account. Crack growth rate was reduced with its length in a logarithm function because of crack closure. However, the crack tip location finally progressed near the boundary position of monotonic plastic zone.
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