知能型万能試験機による降伏点が不明瞭なS45Cの上昇引張速度V_1と弾性-塑性遷移点σ_<ep>との関係

概要

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In certain materials, the yield point appears clearly; in other materials, it is indistinct. Using an intelligent universal test machine, the yield point is measurable even in materials with an indistinguishable yield point. The test machine used in this study can measure stress, strain and time simultaneously. Heretofore, the boundary of plasticity and elasticity has been denoted as the elasticity-plasticity transition point (E-P point σ_<ep>) to distinguish it from the yield point. In this study, the behavior of the E-P point σ_<ep> of an indistinguishable-yield-point material S45C material is analyzed on the basis of the change in of the elevated tensile speed V_1 increase. Experimental results were analyzed on the basis of the relationship between stress and strain due to elastic recovery (reducibility strain), and between stress and stress due to elastic recovery (reducibility stress). In this paper, we explain that the E-P point σ_<ep> of S45C material in accordance with tension is based on the elastic recovery of S45C material.
一般社団法人日本機械学会の論文
2006-06-25