腹板开孔薄壁工字梁准静态压缩力学行为及稳定性分析  

QUASI⁃STATIC COMPRESSIVE BEHAVIOR AND STABILITY ANALYSIS OF CELLULAR THIN⁃WALLED BEAMS

作　　者：田新宇 邓庆田[1] 李新波[1] 王国圣 宋学力[1] TIAN XinYu;DENG QingTian;LI XinBo;WANG GuoSheng;SONG XueLi(School of Science,Chang′an University,Xi′an 710064,China;Vehicle Performance Center,Zhejiang Geely New Energy Commercial Vehicles Group Co.,Ltd.,Hangzhou 311228,China)

机构地区：[1]长安大学理学院,西安710064 [2]浙江吉利新能源商用车集团有限公司整车性能中心,杭州311228

出　　处：《机械强度》2024年第3期550-558,共9页Journal of Mechanical Strength

基　　金：中央高校基本科研业务费专项资金(310812163504)资助。

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。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 

分 类 号：O347.2[理学—固体力学]