2126 応力三軸度の変化に伴う切欠試験片の最大引張強さの変化特性(G03-4 材料特性,G03 材料力学)

概要

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Dependence of maximum tensile strength of notched specimen on stress triaxiality was investigated for a variety of structural steels. Both the notched specimens with different notch acuity and the unnotched specimens were employed to obtain a wide range of stress triaxiality. All specimens were loaded to break under tensile loading at room temperature. A marked increase in the maximum tensile strength to break the notched specimen was observed with increase in stress triaxiality. Similarly, a ratio of the maximum tensile strength to tensile strength increased with increasing stress triaxiality, which eventually reached the upper limit ratio in the range of high stress triaxialities. It is expected that those limiting ratios ranging from 1.7 to 1.95 for various materials could be used to estimate the maximum loads applied to the mechanical components.
一般社団法人日本機械学会の論文
2007-09-07