Evolution rules of normal-yield ratio in subloading surface model

抄録

The novel evolution equations of the normal-yield ratio will be formulated in this article, which excludes the defects: 1) It is inapplicable to the cyclic loading behavior under variable stress amplitudes ranging from low and high stress levels, 2) It is requires the judgment whether the normal-yield ratio reaches the threshold value of elastic limit instead of the yield judgement.