材料力学(双语)Torsion.pdf

M Chapter 3 E C H Torsion ） 语 双 （ 学 力 料 材 A N I C S O F M A T E R I A L S Content §3.1 Introduction §3.2 External Torque of Shaft · Internal Torques and its Diagrams §3.3 Torsion of Thin-walled Tube §3.4 Stresses in Circular Bar under Torsion · Strength Conditions §3.5 Deformations of Circular Bar under Torsion · Rigidity Conditions §3.6 Statically Indeterminate Problems of Circular Bar in Torsion §3.7 Stresses and Deformations of Noncircular Bar under Free Torsion 2 目录 §3.1 概述 §3.2 传动轴的外力偶矩· 扭矩及扭矩图 §3.3 薄壁圆筒的扭转 §3.4 等直圆杆在扭转时的应力 · 强度条件 §3.5 等直圆杆在扭转时的变形 · 刚度条件 §3.6 等直圆杆的扭转超静定问题 §3.7 等直非圆杆自由扭转时的应力和变形 3 3.1 Introduction Shaft ：In engineering the members of which deformations are mainly torsion. Such as transmission shafts in machines, drill rods in oil-drilling rigs etc. 轴：工程中以扭转为主要变形的构件。 Torsion ：Resultant of the external forces is a force couple and its acting plane is perpendicular to the axis of the shaft. Under this case the deformation of the rod is torsion. 扭转：外力的合力为一力偶，且力偶的作用面与直杆的