温度依存性のある弾性率の過渡応答による評価法

概要

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A new method is proposed for evaluation of the temperature dependence of Young's modulus. Even if a material shows linear elasticity, the apparent stress-strain curve will be nonlinear when the measurement is carried out during heating. An optimization problem combined with finite element analysis is applied to the evaluation of the temperature dependence. The objective function of this problem to be minimized is the root mean square value of calculated stress which deviates from measured one, and the variable is the modulus as a function of temperature. It was found that the temperature dependence of a plastic material was well approximated by this method with a polynomial expression for the case of small temperature change. Although approximation was not so good for the case of large temperature change, this method is expected to work well with a better optimization process.
一般社団法人日本機械学会の論文
1996-02-25