关于轴向力作用下梁弯曲时中性轴位置的讨论  

Discussion of Neutral Axis Position of Beam Bending under the Action of Axial Force

作　　者：吴晓[1] 李叶林[1] Xiao;Yelin(College of Mechanical Engineering,Hunan University of Arts and Science,Changde 415000,Hunan,China)

机构地区：[1]湖南文理学院,湖南常德415000

出　　处：《工程与试验》2018年第3期1-2,124,共3页Engineering and Test

摘　　要：研究了中性轴位置对轴向力作用下梁弯曲变形的影响。研究结果表明,轴向力作用下梁弯曲时的中性轴位置,与梁纯弯曲时的中性轴位置不同。但由于轴向力作用下梁弯曲时的中性轴位置与梁纯弯曲时的中性轴位置的距离非常小,对轴向力作用下梁弯曲变形的计算影响不大,所以现行材料力学教材关于轴向力作用下梁弯曲变形的计算,皆以梁纯弯曲时的中性轴位置为基准,来简化梁的弯曲变形计算。The influence of the neutral axis position on bending deformation of beam under the action of axial force is studied. The results of the research show that the neutral axis position of beam bending under the action of axial force is different from the neutral axis position of pure bending beam. Because the distance is very small between the neutral axis position of beam bending under the action of axial force and the neutral axis position of pure bending beam, there is a little influence on the calculation of bending deformation of beam under the action of axial force. Therefore, in the current Material Mechanics textbook, the calculation of the bending deformation of beam under the action of axial force is based on the neutral axis position of pure bending beam to simplify the calculation of the bending deformation of beam.

关 键 词：轴向力 梁 弯曲 中性轴 位置 

分 类 号：TB301[一般工业技术—材料科学与工程]