ひずみ速度および温度の影響を考慮した構成方程式の高精度化に関する研究

概要

論文の詳細を見る
Constitutive relation between strain and stress in steels under arbitrary strain rate and temperature is proposed. Plastic deformation can be seen as a kind of thermal activated process, so it can be considered that constitutive equation could be related to activated free energy in solid. New parameter(F_n), which can precisely reflect the activated free energy in solid, is applied as the parameter of the constitutive equation suggested in here in order to quantify the effect of strain rate and temperature. Concrete expression of F_n-parameter as function of plastic strain, plastic strain rate and temperature is derived from round bar tensile tests under various strain rate and temperature conditions. The validity of suggested constitutive equation based on F_n-parameter has confirmed by comparing the measured strain/stress curves under various conditions.
社団法人日本船舶海洋工学会の論文
2003-03-20