Introductionmi@see.cn
Introduction mi@seu.edu.cn
Contents·ABriefHistory（学科简史）·ContentDescription（课程描述）·ClassificationofSolidBodies（固体的分类）·StructuresComposedofPrismaticBars（杆系结构）·Loads（荷载）·RestraintsandReactions（约束与支反力）Spacevs.Free-bodyDiagram（真实系统与受力简图）·AssumptionsofStrengthofMaterials（材料力学基本假设）·GeometricCharacteristicsofPrismaticBars（杆件的几何特征）·FormsofDeformationofPrismaticBars（杆件基本变形形式）·RequirementsofaStructuralElement（构件基本要求）·Fatigue（疲劳）·CourseObjectives（课程目标）·Topics Covered（主要议题）2
Contents • A Brief History（学科简史） • Content Description（课程描述） • Classification of Solid Bodies（固体的分类） • Structures Composed of Prismatic Bars（杆系结构） • Loads（荷载） • Restraints and Reactions（约束与支反力） • Space vs. Free-body Diagram（真实系统与受力简图） • Assumptions of Strength of Materials（材料力学基本假设） • Geometric Characteristics of Prismatic Bars（杆件的几何特征） • Forms of Deformation of Prismatic Bars（杆件基本变形形式） • Requirements of a Structural Element（构件基本要求） • Fatigue（疲劳） • Course Objectives（课程目标） • Topics Covered（主要议题） 2
History of Strength of Materials‘From the earliest times when people started tobuild, it was found necessary to have informationregarding the strength of structural materials sothat rules for determining safe dimensions ofmembers could be drawn up.HISTORYOFSTRENGTHOFMATERIALSSTEPHENPTIMOSHENKO3
“From the earliest times when people started to build, it was found necessary to have information regarding the strength of structural materials so that rules for determining safe dimensions of members could be drawn up.” 3 History of Strength of Materials
Old Kingdom of EgyptPyramids at Giza, Egypt ~ 2500 B. C.4
Old Kingdom of Egypt Pyramids at Giza, Egypt ~ 2500 B. C. 4
Technology of Ancient Egypt? Solar Calendar: Accurate Surveying Techniques: Mathematics and Spatial Concepts:Volumes (truncated pyramid),Slopes, Angles, Weight of Stones(Density), Multiplication &Division, Decimal System, π→3.16. Simple Machines: Lever, Inclinedplane, Leveling with water, Nopulleys, No wheeled carts, Verylittle timber5
• Solar Calendar • Accurate Surveying Techniques • Mathematics and Spatial Concepts: Volumes (truncated pyramid), Slopes, Angles, Weight of Stones (Density), Multiplication & Division, Decimal System, π→3.16 • Simple Machines: Lever, Inclined plane, Leveling with water, No pulleys, No wheeled carts, Very little timber 5 Technology of Ancient Egypt