ひずみ速度依存性材料の引張延性とひずみ速度変化率の関係

概要

論文の詳細を見る
Significant interest lies in the influence of rate of change of strain rate on elongation. Uniaxial ductility of rate-dependent sheet materials which have the ability of strain hardening as well as strain rate sensitivity is examined. The analytical results combined with conventional instability theories predict the significance of the rate of change of strain rate during uniaxial deformation in estimating the ductility. In various uniaxial tensile tests used by a computer-aided Instron machine, the effect of accelerated strain rate is recognized about limit strain. Furthermore, the instability strain is evaluated by using standard deviation of axial strain distribution, and the influence of accelerated strain rate on instability strain is confirmed. In the present work it was clarified that limit strain and instability strain could be increased by using a higher value for the strain rate path.
一般社団法人日本機械学会の論文
1994-07-25