拉压,(Axial tension& Compression, Shear) 第二章轴向拉伸和压缩 Chapter2 Axial Tension and Compression 2-1轴向拉压的概念及实例 (Concepts and examples of axial tension& compression) 2-2内力计算 (Calculation of internal force) 2-3应力及强度条件 (Stress and strength condition)
2 (Axial tension & Compression, Shear) §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)
瓯 (Axial tension& Compression, Shear)□ D2-4材料在拉伸和压缩时的力学性能 (Material properties in axial tension and compression) D§2-5拉压杆的变形计算 (Calculation of axial deformation) 52-6拉压超静定问题 (Statically indeterminate problem of axially loaded members) D§2-7剪切变形( Shear deformation)
3 (Axial tension & Compression, Shear) §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)
瓯 (Axial tension& Compression, Shear)□ §2-1轴向拉压的概念及实例 (Concepts and example problems of axial tension compression) 、工程实例 (Engineering examples
4 (Axial tension & Compression, Shear) §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)
瓯 (Axial tension& Compression, Shear)□ 受力特点( Character of external force) 外力的合力作用线与杆的轴线重合 、变形特点( haracter of deformation) 沿轴向伸长或缩短 四、计算简图( Simple diagram for calculating) 轴向拉伸 轴向压缩 (axial tension) (axial compression)
6 (Axial tension & Compression, Shear) 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)
瓯 (Axial tension& Compression, Shear)□ §2-2内力计算 ( Calculation of internal force 、求内力( Calculating internal force 设一等直杆在两端轴向拉力F的作用下处于平衡,欲求杆件 横截面mm上的内力
7 (Axial tension & Compression, Shear) m m F F 一、求内力 (Calculating internal force) 设一等直杆在两端轴向拉力F 的作用下处于平衡,欲求杆件 横截面 m-m 上的内力. §2–2 内力计算 (Calculation of internal force)
瓯 (Axial tension& Compression, Shear)□ 截面法( Method of sections (1)截开 在求内力的截面mmF 处,假想地将杆截为两部分 (2)代替 取左部分部分作为研F 究对象弃去部分对研究对 象的作用以截开面上的内 力代替,合力为FN
8 (Axial tension & Compression, Shear) 在求内力的截面m-m 处,假想地将杆截为两部分. 取左部分部分作为研 究对象.弃去部分对研究对 象的作用以截开面上的内 力代替,合力为FN . m m F FN 1.截面法(Method of sections) (1)截开 m m F F (2)代替