Quasi-static compressive behavior and stability analysis of cellular thin-walled beams

TIAN XinYu; DENG QingTian; LI XinBo; WANG GuoSheng; SONG XueLi

doi:10.16579/j.issn.1001.9669.2024.03.005

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Quasi-static compressive behavior and stability analysis of cellular thin-walled beams

更新时间：2024-07-05

- Quasi-static compressive behavior and stability analysis of cellular thin-walled beams
- Journal of Mechanical Strength Vol. 46, Issue 3, Pages: 550-558(2024)
- 作者机构：
  
  1. 长安大学理学院
  2. 浙江吉利新能源商用车集团有限公司整车性能中心
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2024.03.005
  CLC： O347.2
- Published：15 June 2024，
- 稿件说明：
移动端阅览
TIAN XinYu, DENG QingTian, LI XinBo, et al. Quasi-static compressive behavior and stability analysis of cellular thin-walled beams. [J]. Journal of Mechanical Strength , 2024,46(3):550-558.
DOI：

TIAN XinYu, DENG QingTian, LI XinBo, et al. Quasi-static compressive behavior and stability analysis of cellular thin-walled beams. [J]. Journal of Mechanical Strength , 2024,46(3):550-558. DOI： 10.16579/j.issn.1001.9669.2024.03.005.

摘要

对蜂窝、内凹和椭圆构型腹板开孔薄壁工字梁在准静态单轴压缩作用下的力学行为及稳定性进行了实验和有限元仿真研究。通过对比实验和有限元仿真的结果，验证有限元仿真的可靠性。基于实验结果和有限元仿真结果，分析了不同构型腹板开孔薄壁工字梁的最大承载力、弹性模量和破坏机制，得出孔型对腹板开孔薄壁工字梁压缩失稳的影响规律。研究表明，孔到翼缘的距离越大结构稳定性越好，稳定性较好的腹板开孔薄壁工字梁压缩失稳的位置出现在两孔之间，同时内凹构型相比蜂窝和椭圆构型腹板开孔薄壁工字梁具有更好的稳定性。

Abstract

The mechanical behavior and stability of thin-walled I-beams with honeycombs

concave and elliptic cellular under quasi-static uniaxial compression were studied by experiments and the finite element simulation. By comparing results of experiments and the finite element simulation

the reliability of the finite element simulation was verified. Based on experimental results and finite element simulation results

the maximum bearing capacity

elastic modulus and failure mechanism of thin-walled I-beams with honeycombs were analyzed

and the influence law of the cell type on the compression instability of thin-walled I-beam with honeycombs was obtained. The results show that the larger the distance from the hole to the flange

the better the stability of the structure. The buckling position of thin-walled I-beams with honeycombs with good stability appears between the two holes

and the concave structure has better stability than the honeycomb and elliptical structure.

关键词

多孔梁稳定性承载能力弹性模量失稳特点

Keywords

Cellular beamStabilityBearing capacityElastic modulusInstability characteristics

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