第一章 轴向拉伸和压缩.ppt

CHAPTER 1
AXIAL TENSION AND
Mechanics of Materials
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材料力学
第一章轴向拉伸和压缩
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CHAPTER 1 AXIAL TENSION PRESSION
§1–1 Concepts and practical examples of axial tension pression
§1–2 Internal force、method of section、axial force and its diagram
§1–3 Stresses on the section and strength conditions
§1-4 Deformation of the rod in axial tension pression  law of elasticity
§1-5 Elastic strain energy of the rod in axial tension pression
§1-6 Statically indeterminate problems and their treatment methods of axial
tension pression
§1-7 Mechanical properties of materials in axial tension pression
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§1–1 轴向拉压的概念及实例
§1–2 内力、截面法、轴力及轴力图
§1–3 截面上的应力及强度条件
第一章轴向拉伸和压缩
§1-4 拉压杆的变形弹性定律
§1-5 拉压杆的弹性应变能
§1-6 拉压超静定问题及其处理方法
§1-7 材料在拉伸和压缩时的力学性能
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§1–1 CONCEPTS AND PRACTICAL EXAMPLES OF
AXIAL TENSION PRESSION
Characteristic of the external force:The acting line of the resultant of external forces is coincided with the axis of the rod.
1、Concepts
Characteristic of the deformation:Deformation of the rod is mainly elongation or contraction along the axis of the rod panied with lateral reduction or enlargement.
Axial tension :Deformation of the rod is axial elongation and lateral shortening.
pression:Deformation of the rod is axial shortening and lateral enlargement.
AXIAL TENSION PRESSION
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拉压
§1–1 轴向拉压的概念及实例
轴向拉压的外力特点:外力的合力作用线与杆的轴线重合。
一、概念
轴向拉压的变形特点:杆的变形主要是轴向伸缩,伴随横向
缩扩。
轴向拉伸:杆的变形是轴向伸长,横向缩短。
轴向压缩:杆的变形是轴向缩短,横向变粗。
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In pression,the corresponding force is pressive force.
In axial tension,the corresponding force is called tensile force.
Mechanical models are shown in the figures
AXIAL TENSION PRESSION
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拉压
轴向压缩,对应的力称为压力。
轴向拉伸,对应的力称为拉力。
力学模型如图
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Practical examples in engineering
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AXIAL TENSION PRESSION
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拉压
工程实例
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