A Strength Evaluation Method of a Sharply Notched Structure by a New Parameter, "The Equivalent Stress Intensity Factor"

概要

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A new method is proposed to evaluate the strength of a sharply notched structure with a large notch angle. A new parameter, K_e which is to be called the equivalent stress intensity factor and which prescribes the singularity of stress distribution near the notch tip, is defined to evaluate the effect of a sharp notch on the fatigue and static strength. This method makes it possible to predict the strength of a notched structure by using the well-known parameters ΔK_<th> and K_<Ic>. Fatigue tests of HT60 (600 MPa-class high-strength steel) and SS41 (400 MPa-class mild steel) and a brittle fracture test of an acrylic plate were conducted, and the applicability of the parameter was verified.
社団法人日本機械学会の論文
1991-01-15