《材料力学》课程教学课件（PPT讲稿）第二章 轴向拉伸和压缩 Axial Tension and Compression 2.1 轴向拉压概念及实例

第二章轴向拉伸和压缩 Chapter2 Axial Tension and Compression

Chapter2 Axial Tension and Compression

第二章轴向拉伸和压缩Chapter2 Axial Tension and Compression2-1轴向拉压的概念及实例examples of axial tension &(Concepts andcompression)62-2内力计算(Calculation of internal force)2-3应力及强度条件(Stressand strengthcondition)

§2-1 轴向拉压的概念及实例 (Concepts and examples of axial tension & compression) 第二章 轴向拉伸和压缩 Chapter2 Axial Tension and Compression §2-2 内力计算 (Calculation of internal force) §2-3 应力及强度条件 (Stress and strength condition)

62-4材料在拉伸和压缩时的力学性能(Material properties in axial tension andcompression)2-5拉压杆的变形计算(Calculationofaxialdeformation)S2-6拉压超静定问题problem of(Staticallyindeterminateaxiallyloadedmembers)s2-7剪切变形(Sheardeformation）

§2-4 材料在拉伸和压缩时的力学性能 (Material properties in axial tension and compression) §2-5 拉压杆的变形计算 (Calculation of axial deformation) §2-6 拉压超静定问题 (Statically indeterminate problem of axially loaded members) §2-7 剪切变形(Shear deformation)

S2-1轴向拉压的概念及实例(Concepts and example problems of axialtension&compression)一、工程实例（Engineeringexamples）挺杆为二力杆四行程柴油机示意图喷油器088X000正时齿轮喷润泵

§2-1 轴向拉压的概念及实例 (Concepts and example problems of axial tension & compression) 一、工程实例(Engineering examples) x 880 1000 y z y x z 880 挺杆为二力杆

挺杆为二力杆。Y

挺杆为二力杆

受电弓

受电弓

二、受力特点（Characterofexternalforce)外力的合力作用线与杆的轴线重合。三、变形特点（Characterofdeformation）沿轴向伸长或缩短。四、计算简图（Simplediagramforcalculating）FFF轴向压缩轴向拉伸(axialcompression)(axialtension)

三、变形特点(Character of deformation) 沿轴向伸长或缩短。 二、受力特点(Character of external force) 外力的合力作用线与杆的轴线重合。 四、计算简图 (Simple diagram for calculating) F F F F 轴向压缩 (axial compression) 轴向拉伸 (axial tension)