华北水利水电大学学报（自然科学版）2024，Vol.45Issue(6)：74-80,7.DOI:10.19760/j.ncwu.zk.2024068
基于多线性材料硬化的向量式有限元C型薄壁型钢屈曲分析
Buckling Analysis of C-type Thin-walled Steel with Vector Form Intrinsic Finite Element Based on Multi-linear Material Hardening
摘要
Abstract
C-shaped thin-walled steel is quite common in practical engineering and is prone to buckling failure under the action of force.The traditional finite element method has a mature scheme for predicting structural buckling,but the proce-dure is complicated.Based on the vector form intrinsic finite element(VFIFE)method,a Fortran calculation program for triangular shell element is developed.The pre-processing and post-processing programs are written in Matlab,and the cal-culation results are compared with those of classical hyperbolic shell buckling to check their correctness.Considering geo-metric non-linearity and material non-linearity,a multi-linear material hardening model is introduced to calculate the buck-ling characteristics of C-type thin-walled steel with different sizes under axial load.The buckling load is determined by the displace axial force curve,and the deformation after buckling is plotted by the post-processing program and compared with the existing test results.The results show that the VFIFE method with multi-linear material hardening model can predict the buckling load and buckling mode of the structure well,which provides a new and reliable reference for predicting the buck-ling behavior of the structure.关键词
向量式有限元/结构屈曲/多线性材料硬化模型/后屈曲Key words
vector form intrinsic finite element/structural buckling/multi-linear material hardening model/post-buckling分类
建筑与水利引用本文复制引用
孙子涵,陈朝晖,宋春草,马文亮..基于多线性材料硬化的向量式有限元C型薄壁型钢屈曲分析[J].华北水利水电大学学报（自然科学版）,2024,45(6):74-80,7.基金项目
国家自然科学基金项目(11402090) （11402090）
河南省水利厅科技攻关项目(GG202050) （GG202050）
华北水利水电大学博士研究生创新基金(NCWUBC202228). （NCWUBC202228）
