A conditions for plane stress problem 平面应力问题的条件 Body-a very thin plate of uniform thickness t 很薄的等厚度薄板 External forces 1. The surface forces act on the edges only 面力仅作用板周边 2. The surface forces and body forces are parallel to the faces of the plate and distributed uniformly over the thickness 面力体力平行于板面且沿厚度无变化 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 3 A. conditions for plane stress problem 平面应力问题的条件 • Body--a very thin plate of uniform thickness t. 很薄的等厚度薄板 • External forces-- 1. The surface forces act on the edges only. 面力仅作用板周边 2. The surface forces and body forces are parallel to the faces of the plate and distributed uniformly over the thickness. 面力体力平行于板面且沿厚度无变化