疲れ破壊の仮説について

概要

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There has been some difficulties in explaining compression endurance limit diagram, by preceeding fatigue criteria. The authors propose a new criterion and show that this can explain the compression endurance limit diagram. In this criterion they consider that the material is fatigued by the stress amplitude of the repeated shearing stress and the strength is decreased in proportion to that stress amplitude. Then the failure occurs when the material can not bear the normal or shearing stress working there. The formar is the separating failure, and in this case the separating strength is weakened by the coexisting shearing stress. The latter is the sliding failure and the shearing strength is weakened by the tensile normal stress working there, while it is strengthened by the compressive normal stress. The fracture occurs in the plane where these total effects become maximum.
一般社団法人日本機械学会の論文
1956-03-25