応力,ひずみ速度および温度の間の構成関係

概要

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A constitutive equation for stress, stress-rate, strain-rate and temperature effect is proposed and examined with the experimental results. The proposed equation is a combination of an Arrehnius equation and Malvern-type constitutive equation, which was proposed by the author previously, and indicated well the impact behaviors of various materials. The characteristics of the present equation are : (1) constants involved in the equation are clear and accurate physically, (2) the athermal stress component and maximum limit of strain-rate are considered, (3) at a high strain-rate, there are approximated linear relationships between stress, the reciprocal of absolute temperature and the logarithm of plastic strain-rate, (4) at a low strain-rate, there is a linear relationship between stress and the plastic strain-rate, (5) the proposed equation represents experimental results of constitutive relations of metals with a few exceptions, such as the blue brittleness range of steels.
一般社団法人日本機械学会の論文
1986-06-25