Three branches of solid mechanics 固体力学的三个分枝 Mechanics of materials材料力学, Structural mechanics结构力学 Elasticity 弹性力学 弹性力学第一章
弹性力学第一章 6 Three branches of solid mechanics 固体力学的三个分枝 • Mechanics of materials 材料力学, Structural Mechanics 结构力学 Elasticity 弹性力学
What does the elasticity deal with? It deals with the stresses. deformations and displacements in elastic solids produced by external forces or changes in temperature 研究弹性体由于外力和温度改变而引起的应力, 形变和位移。 It analyzes the stresses, deformations and displacements of structural elements within the elastic range and thereby to check the sufficiency of their strength. stiffness and sta bility 分析结构的应力,形变和位移,检查是否满足强 度,刚度和稳定性条件。 弹性力学第一章
弹性力学第一章 7 • What does the Elasticity deal with? It deals with the stresses, deformations and displacements in elastic solids produced by external forces or changes in temperature. 研究弹性体由于外力和温度改变而引起的应力， 形变和位移。 • It analyzes the stresses, deformations and displacements of structural elements within the elastic range and thereby to check the sufficiency of their strength, stiffness and stability. 分析结构的应力，形变和位移，检查是否满足强 度，刚度和稳定性条件
Comparison among the three courses in solid mechanics 固体力学三门学科的比较 Three branches have the same purpose and do differ from one another both in objects studied and the methods of analysis used 1. Objects studied研究对象 2. Methods of analysis研究方法 弹性力学第一章
弹性力学第一章 8 Comparison among the three courses in solid mechanics 固体力学三门学科的比较 • Three branches have the same purpose and do differ from one another both in objects studied and the methods of analysis used. • 1. Objects studied 研究对象 2. Methods of analysis 研究方法
1. objects studied:-研究对象: Similarity---相同点 to deal with the elastic solids 都是研究弹性体 弹性力学第一章
弹性力学第一章 9 to deal with the elastic solids 都是研究弹性体 1. objects studied:--研究对象: (1) Similarity---------相同点
(2) objects studied- difference研究对象-不同点 Mechanics of materials bar element 材料力学 单根杆件 Structural bar systems: Mechanics truss, rig gid frame 结构力学 杆件系统:桁架,刚架。 Elasticity:. plates and shells板,壳 弹性力学2. blocks:块体 dams foundations坝,基础 3. analyze bar element precisely 对杆件作精确分析 弹性力学第一章
弹性力学第一章 10 (2)objects studied--difference研究对象--不同点 Mechanics of materials : bar element 材料力学 单根杆件 Structural bar systems:-- Mechanics : truss, rigid frame 结构力学 杆件系统： 桁架，刚架。 Elasticity: 1. plates and shells 板，壳 弹性力学 2.blocks: 块体 e.g. dams,foundations 坝，基础 3.analyze bar element precisely 对杆件作精确分析