D. conditions for plane strain problem 平面应变问题的条件 Body--a cylindrical or prismatical body with infinite length无限长的柱形体 External forces 1. The surface forces are acting on the lateral surface 面力仅作用横向周边 2. The surface forces and body forces are parallel to any cross section of the body and not varying along the axial direction 面力体力平行于横截面且不沿长度变化。 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 7 D. conditions for plane strain problem 平面应变问题的条件 • Body--a cylindrical or prismatical body with infinite length 无限长的柱形体 • External forces-- 1. The surface forces are acting on the lateral surface. 面力仅作用横向周边 2. The surface forces and body forces are parallel to any cross section of the body and not varying along the axial direction. 面力体力平行于横截面且不沿长度变化