观察到垃圾土的轴向应变超过30 %而其主应力差仍然在增长。
Although the value of axial strain of refuse exceeds 30 %, the phenomenon of the increase of the principal stress difference is observed.
利用单向应力下磁输出信号与主应力差间的关系，即主应力差法，国内外已取得了一定的成果。
Recently progresses have been made using the relationship between magnetic output and principal stresses difference under uniaxial stress.
最后，利用所得的解研究了材料的中间主应力效应和拉压强度差效应对厚壁圆筒安定极限压力的影响。
Finally, the influences of the intermediate principal stress and the strength-difference on the shakedown limit pressure of the thick-walled cylinder are investigated by the present solution.
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