Material property controlling non-propagating fatigue crack length of mechanically and physically short-crack based on Dugdale-model analysis

摘要: Abstract Non-propagating fatigue crack lengths were analytically calculated under stress control conditions using plasticity-induced closure analysis with the Dugdale model. In addition, a non-dimensionalization method was applied in terms of Burgers vector and monotonic plastic zone size small-scale yielding conditions, which validated for various initial material properties. When yield strength increased, non-propagating found to increase short decrease long crack. The enabled analytical derivation generalized length, can be utilized designs. property controlling threshold intensity factor range mechanically physically short-crack discussed.