§11-1基本概念 §11-2细长压杆的临界力 §11-3压杆的临界应力 §11-4压杆的稳定校核 §11-5稳定系数法 §11-6提高压杆稳定性的措施 §11-7纵横弯曲的概念

1.1 金属材料的性能 1.1.1 金属材料的力学性能 1.1.2 金属材料的其它性能简介 1.2 金属的晶体构造和结晶过程 1.2.1 金属的晶体结构 1.2.2 金属的结晶过程 1.2.3 金属的同素异构转变 1.2.4 实际金属的晶体结构

附录Ⅰ 截面的几何性质 (Appendix Ⅰ Properties of plane areas) 1-1 截面的静矩和形心(The first moments of the area & centroid of an area) 1-4 转轴公式 (Rotation of axes) 1-2 极惯性矩 惯性矩 惯性积 (Polar moment of inertia Moment of inertia Product of inertia) 1-3平行移轴公式 (Parallel-Axis theorem)

11–1 交变应力与疲劳失效(Alternating stress and fatigue failure) 11–3 持久极限(Endurance limit) 11–2 交变应力的循环特征、应力幅和平 均应力(The cycle symbol,stress amplitude and mean stress for alternating stress） 11–4 影响持久极限的因素 (The effective factors of endurance limit )

研究了基体中不同合金元素及热处理对高碳、高合金铁基渗铜烧结阀座材料的密度和力学性能的影响。结果表明,用机械混合高碳、高合金粉末压坯经过一步法烧结/熔渗后,密度达到7.88g/cm3(相对密度98.2%),硬度和抗弯强度分别达到HRc45.4和1124MPa。将渗铜后的材料在900℃淬火,580℃高温回火后,铁颗粒中组织主要为回火马氏体,材料硬度达到HRc40以上

7-1应力状态概述 (Concepts of stress-state) 7-2平面应力状态分析-解析法 (Analysis of plane stress-state) 7-3平面应力状态分析-图解法 (Analysis of plane stress-state) 7-4三向应力状态分析 (Anolsis of throo dimons stroas stoto)

4-1基本概念及工程实例 (Basic concepts and example problems) 4-2梁的剪力和弯矩(Shear- force and bending- moment in beams) 4-3剪力方程和弯矩方程剪力图和弯矩图 (Shear-force& bending-moment equations shear-force-& bending- moment diagrams)

6-1基本概念及工程实例 (Basic concepts and example problems) 6-2挠曲线的微分方程(Differential equation of the deflection curve) 6-3用积分法求弯曲变形 Beam deflection by integration 6-4用叠加法求弯曲变形 (Beam deflections by superposition)

5-1引言( Introduction) 5-2纯弯曲时的正应力 (Normal stresses in pure beams) 5-3横力弯曲时的正应力( Normal stresses in transverse bending 5-4梁的切应力及强度条件(Shear stresses in beams and strength condition) 5-5提高梁强度的主要措施( Measures to strengthen the strength of beams)

3-1扭转的概念和实例 (Concepts and example problem of torsion) 3-2扭转内力的计算 (Calculating internal force of torsion) §3-3薄壁圆筒的扭转 (Torsion in thin-wall circular tube) 3-4圆轴扭转的应力分析及强度条件 (Analyzing stress of circular bars& strength condition)