概述
正常工作要求normal working requisition
强度要求strength condition
刚度要求stiffness condition
稳定性要求stability condition
基本假设Basic assumptions
连续性continuity
均匀性uniformity
各向同性isotropy
小变形small deformation
主要研究杆件mainly talk about bars
拉伸、压缩tension compression
轴力图axial force diagram
材料拉伸力学性能 low carbon steeltension mechanical properties of materials
比例极限proportional limit
弹性极限elastic limit
屈服极限yield limit
产生塑形形变plastic deformation滑移线slip line重要指标important index
强度极限strength limit
塑形重要指标plastic important index
断面收缩率reduction of area
伸长率elongation
材料压缩力学性能compression mechanical properties of materials
许用应力allowable stress
超静定indeterminate
剪切shear
应力集中stress concentration
静载荷作用下可不考虑
扭转torsion
扭矩图torque diagram
切应力互等定律shearing stress theorem
圆筒扭转应力twisting stress of thin wall cylinder
圆轴扭转应力twisting stress of axial
圆轴扭转变形twisting deformation of axial
弯曲bending
弯矩图bending moment diagram剪力图shearing diagram
正应力 两端最大normal stress
切应力 中间最大shear stress
增大弯曲强度方法
梁的支架放在合理的位置supporter should be in reasonable place
合理配置载荷good assumption of load
梁截面the section of beam
变形deformation
应力应变分析
主应力 铸铁扭断 principal stress
胡克定律Hooke's law
失效形式failure maode
最大正应力maximum principal stress
最大形变maximum deformation
最大切应力maximum shear stress
能量理论inner energy
压杆稳定stability of bar
欧拉公式 适用于λ足够大Euler's formula flexibility big enough
·提高稳定性方法
增大截面半径increase radius of section
改变约束条件change constraint condition
选择合理材料choose material
交变应力alternating stress
提高办法
倒角，减少应力集中chamfer、decrease stress concentration
提高表面粗糙度improve the roughness
增加表面强度improve strength of surface
