Which of the following expressions most ac curately and simply represents the comple mentary strain energy density Uc of a linear elastic material?

G1 平带传动 G1.1 胶帆布平带 G1.1.1 规格（表 G14-1、表 G14-2）

一、财务风险监测 二、财务危机预警 三、财务预警系统设计与财务预警用途

Extend definition to material bodies: total work is the addition of the work done on all particles by forces distributed over the volume W by forces distributed over the surface t·udS

Concept Question Consider the following simple displacement field

Principle of Virtual Displacements Consider a body in equilibrium. We know that the stress field must satisfy the differential equations of equilibrium. Multiply the differential equations of equilibrium by an \arbitrary\displacement field T

Unit #9 -Calculus of Variations Let u be the actual configuration of a structure or mechanical system. u satisfies the displacement boundary conditions: u=u* on Su. Define

美国麻省理工大学：《结构分析与设计技术》教学资源（讲义）notes122

Which of the following are real problems with the ritz method 1. Selection of basis functions for general ge- metres 2. Lack of systematic procedure to compute stiff atrix and forcing terms

第一条 工程名称、规模、投资额、建设地点 甲方委托乙方承担 工程的设计项目，建筑安装面积为 平方米，批准总投资为 万元，建设地点在