摘要
基于平面假设研究了金属箱形结构弹塑性弯曲下中性层的偏移规律,提出了中性层位置的计算方法,并与实验结果进行了对比分析,结果表明:对称箱形结构在弹塑性变形阶段,随着弯曲半径增大,中性轴到原点的距离减小,中性层向下偏移;非对称箱形结构,中性轴与z轴的夹角逐渐减小,中性轴发生转动。计算结果与实验值误差小于5%,验证了新方法的准确性和可靠性。
Based on plane assumption,deviation rule of neutral layer under elastoplastic bending of metal box-structure was studied,and a new method for calculating the location over elastoplastic neutral layer of box-structure was proposed,and the results were compared with the experimental results. The results show that in the elastic-plastic deformation stage of symmetric box-structure,the distance from neutral axis to origin decreases and the neutral layer moves downward with the increase of bending radius. In the asymmetric box-structure,the angle between the neutral axis and z-axis reduces gradually,and the neutral axis rotates. The results demonstrate that the error between the calculated results and the experimental values is less than 5%,suggesting that the new method has high accuracy and reliability.
作者
赵明基
黄克鹏
王发展
Zhao Mingji;Huang Kepeng;Wang Fazhan(College of Mechanical and Electrical Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China)
出处
《煤矿机械》
北大核心
2020年第2期92-95,共4页
Coal Mine Machinery
基金
中联重科产学科研重点项目(H/ZLTF-YJG014-2012)。
关键词
箱形结构
弹塑性弯曲
中性层
数值仿真
弯曲半径
box-structure
elastoplastic bending
neutral layer
numerical simulation
bending radius
