E Coordinate system for plane strain problem 平面应变问题的坐标系 X and y axes are in any cross section of the body, and z axis is perpendicular to the xy plane. xy轴放在任意的横截面内,z垂直于xy面 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 9 E. Coordinate system for plane strain problem 平面应变问题的坐标系 • x and y axes are in any cross section of the body, and z axis is perpendicular to the xy plane. • x,y轴放在任意的横截面内，z垂直于xy面