C Stresses for plane stress problem 平面应力问题的应力 Noting the absence of surface forces on the faces of the plate, we have板面无面力作用故: z=±t/2 since stress gradients through plate are small, 通过板的应力梯度小 ( oz tzx t)=any≈0 (o oy tx=0, They are functions of x and y only. the plate is said to be in a plane stress condition 板称为处于平面应力状态。 徐汉忠第二版2001/10 弹性力学第二章徐汉忠第二版2001/10 弹性力学第二章 6 C. Stresses for plane stress problem 平面应力问题的应力 • Noting the absence of surface forces on the faces of the plate, we have板 面无面力作用故: (z zx zy)z=t/2=0 • since stress gradients through plate are small, 通过板的应力梯度小 (z zx zy)z=any ≈ 0 • (x y xy)≠0 ,They are functions of x and y only. • the plate is said to be in a plane stress condition 板称为处于平面应力状态