【教学目的】:掌握受力图画法,理解力在直角坐标轴上的投影和合 力投影定理,掌握平面汇交力系平衡方程,掌握力矩的概念和合力矩 定理,掌握力偶的概念、性质、力偶系的合成与平衡理解力的平移定理 及平面一般力系的简化与平衡条件。掌握物系受力图画法,掌握平面一 般力系的平衡计算

【教学课题】:第三章空间力系 【教学目的】:理解空间力系的平衡条件 【教学重点及处理方法】:空间力系平衡问题的平面解法处理方法:详细讲解

4-3横截面上的应力 4-4向拉杆的变形虎克定律 4-5材料在向拉压时的力学性能

【教学目的】:掌握轴向拉伸与压缩的强度条件及应用,虎克定律。 【教学重点及处理方法】:强度条件及应用处理方法:详细讲解 【教学难点及处理方法】:虎克定律

工程中有一些承受扭转的构件,如:汽车方向盘操纵杆后轮的传 动轴,是常见的扭转变形实例。本次课讨论扭转的基本知识

【教学月的】:掌握平面弯曲的概念及内力图的概念 【教学重点及处理方法】:平面弯曲的概念及内力图的概念处理方法:详细讲解

Plasticating Extruder Gear reducer -Feed hopper Heater bands Feed throat

Introduction Color Perception Color Terminology Viewing Color

Introduction The objective of package printing and decorating is to create a visibly identifiable image, consistently, for a large number of impressions. these have been divided into two groups: .\Printing\ in the context of this discussion refers to flexography, lithography and gravure--the methods that

Defined as an impact, characterized by sudden and substantial change in velocity. Shocks in the distribution environment: Accidental and deliberate drops during manual handling Drops from chutes, conveyors, and other machinery Falls from pallet loads Sudden arrests on conveyors Impacts occurring when vehicles hit potholes, curbs, or railroad tracks