拉压弹性模量不等材料杆的过屈曲分析  

Analysis of Post-Buckling of Rods Made of Material with Different Tension-Compression Moduli

作　　者：王康建[1] 赵永刚[1] 王铭慧[1] 李长宏[1] 

机构地区：[1]兰州理工大学理学院,甘肃兰州730050

出　　处：《甘肃科学学报》2014年第6期19-22,共4页Journal of Gansu Sciences

基　　金：国家自然科学基金项目(11262010)

摘　　要：基于杆的过屈曲问题,考虑拉压弹性模量不等材料,建立位移形式的过屈曲控制方程.通过对压应力区和拉应力区的应力分析,推导内力和变形的物理关系,考虑非线性变形,研究拉压性能不同杆的过屈曲平衡路径.通过具体问题的数值结果,分析拉压弹性模量不等材料杆的过屈曲问题的力学特征.Aimed at the problem of post-buckling of rods made of material with different tension-compression moduli, the post-buckling governing equation was established in the form of displacement. Through the stress analysis of compression and tension sections,the constitutive relationship between int：inal force and deformation was deduced, and with nonlinear deformation considered the post-buckling equilibrium path of rods with different tension and compression performances was researched. The mechanical property of postbuckling of rods made of material with different tension-compression moduli was analyzed through the numerical results of specific problems.

关 键 词：拉压弹性模量不等 压杆 非线性 过屈曲 打靶法 

分 类 号：O343.5[理学—固体力学] TU311.2[理学—力学]