The circumferential normal stress is tensile . 周向正应力是张性的。
The normal stress acting in any random direction can be obtained in the following way . 作用于任意方向的正应力可按下列途径来求得。
Cohesion is best defined in terms of the plot of shear stress versus normal stress given in figure 9 . 粘结力最好根据图9中剪切应力和法向应力的关系曲线确定。
Thus the directions that emerge for extremizing the normal stress are the directions corresponding to the principal stresses . 因此,产生最大正应力的方向就是相应于主应力的方向。
Friction and cohesion are best defined in terms of the plot of shear stress versus normal stress given in figure 9 . 摩擦角和粘结力最好是根据图9中剪切应力和法向应力的关系曲线确定。