摘要
针对金属板带辊式矫直过程中的浪变化问题,采用解析计算、数值分析与矫直实验进行研究分析。基于薄板小挠度理论建立金属板带屈曲变形的解析计算模型,引入影响系数分析金属板带平直部分对屈曲区域产生的影响,通过最小能量原理求解得到金属板带临界屈曲载荷,采用摄动变分原理求解后屈曲路径以及模态。通过ABAQUS对金属板带屈曲过程进行仿真分析,利用实验室19辊矫直机进行实验探究。结果表明,金属板带的临界屈曲载荷随着厚度的增加而增加,后屈曲浪高随着厚度的增加而减小;金属板带临界屈曲载荷随着材料弹性模量的增加而增加;金属板带临界屈曲载荷随着中浪半波宽的增加而减少。
Analytical calculation,numerical analysis and straightening experiment were used to study and analyze the problem of wave change during roll straightening process of metal strip.Based on the small deflection theory of thin plate,the analytical calculation model of buckling deformation of metal strip was established.The influence coefficient was introduced to analyze the influence of the flat part of metal strip on the buckling area.The critical buckling load of metal strip was solved by the minimum energy principle.The perturbation variational principle was used to solve the post-buckling path and mode.The buckling process of the metal strip was simulated by ABAQUS,and the experiments were carried out by 19-roll straightening machine in the laboratory.The results show that the critical buckling load of the metal strip increases with the increase of thickness,and the post-buckling wave height decreases with the increase of thickness.The critical buckling load of metal strip increases with the increase of material elastic modulus.The critical buckling load of the metal strip decreases with the increase of the half-wave width of the medium wave.
作者
曹杰
朱晓宇
王效岗
CAO Jie;ZHU Xiao-yu;WANG Xiao-gang(China Engineering Research Center Heavy Machinery Ministry of Education,Taiyuan University of Science and Technology,Taiyuan 030024,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2024年第9期92-98,共7页
Journal of Plasticity Engineering
关键词
中浪
后屈曲
摄动法
解析计算
medium wave
post-buckling
perturbation method
analytical calculation
