多孔工字梁的准静态压缩稳定性及能量吸收性能

田新宇; 邓庆田; 李新波; 宋学力; 王国圣; 温金鹏

doi:10.11858/gywlxb.20230657

多孔工字梁的准静态压缩稳定性及能量吸收性能

doi: 10.11858/gywlxb.20230657

1.
长安大学理学院，陕西西安　710064
2.
浙江吉利新能源商用车集团有限公司整车性能中心，浙江杭州　311228
3.
中国工程物理研究院总体工程研究所，四川绵阳　621999

基金项目: 国家自然科学基金委-中国工程物理研究院NSAF联合基金（U1930204）；中央高校基本科研业务费专项资金（310812163504）

详细信息

作者简介:
田新宇（1998－），男，硕士研究生，主要从事多孔材料与结构力学性能研究. E-mail：2021112051@chd.edu.cn

通讯作者:
邓庆田（1980－），男，博士，副教授，主要从事多孔材料与结构力学性能研究. E-mail：dengqt@chd.edu.cn

中图分类号: O347.2
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出版历程
- 收稿日期: 2023-05-05
- 修回日期: 2023-05-22
- 录用日期: 2023-07-12
- 刊出日期: 2023-09-01

Quasi-Static Compression Stability and Enegy Absorption Performance of Cellular I-Beam

1.
School of Science, Chang’ an University, Xi’an 710064, Shaanxi, China
2.
Vehicle Performance Center, Zhejiang Geely New Energy Commercial Vehicles Group Co., Ltd., Hangzhou 311228, Zhejiang, China
3.
Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China

摘要

摘要: 轻量化多孔工字梁在外部荷载作用下具有优异的能量吸收特性。提出用胞元腹板代替实心腹板设计胞元腹板工字梁结构，基于方胞元、蜂窝胞元、内凹胞元和圆胞元4种胞元类型与方形、蜂窝、内凹和圆形4种腹板开孔孔型进行组合并设计构型。通过实验和有限元分析研究不同胞元类型和腹板开孔类型对工字梁压缩性能和能量吸收性能的影响。结果表明：胞元类型和腹板开孔类型对工字梁的压缩性能具有显著影响，方胞元工字梁的极限承载力最高，蜂窝胞元工字梁的吸能性能最好，而圆胞元工字梁的承载力和吸能性能较差，负泊松比胞元会使薄壁工字梁的失稳变形模式发生明显改变，内凹胞元能有效抑制工字梁发生向腹板两侧错位挤压失稳的趋势。
- 胞元腹板 /
- 工字梁 /
- 准静态压缩 /
- 吸能特性
Abstract: Lightweight cellular I-beams have excellent energy absorption characteristics under external loads. This paper proposes to use cell web instead of solid web to design the I-beam structure of cell web. Based on the combination of square cell, honeycomb cell, concave cell and round cell, and square, honeycomb, concave and circular web openings, the configuration of this paper was designed. The effects of different sibling type and web opening type on compression performance and energy absorption of I-beam were studied by experiments and finite element analysis. The results show that cell types and web hole types have significant effects on the compression performance of I-beam. The ultimate bearing capacity of square cell I-beam is larger, while honeycomb cell I-beam has the best energy absorption characteristics, while circular cell I-beam has poor bearing capacity and energy absorption performance. The negative Poisson’s ratio cell can significantly change the deformation mode of thin-walled I-beam, and the concave cell can effectively inhibit the dislocation extrusion instability trend of I-beam on both sides of the web.
- cellular web /
- I-beam /
- quasi-static compression /
- energy absorption characteristic

HTML全文

图 1 方形开孔的方胞元腹板工字梁建模流程

Figure 1. Modeling flow chart of square cell web I-beam with square openings

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图 2 胞元及腹板开孔尺寸

Figure 2. Dimension of cell and web openings

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图 3 部分胞元腹板工字梁打印试件示意图

Figure 3. Schematic diagram of some cell web I-beam printing specimens

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图 4 实验装置(a)及PLA材料的名义应力-应变曲线(b)

Figure 4. Experimental device (a) and nominal stress-strain curves of PLA material (b)

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图 5 实验装置示意图

Figure 5. Schematic diagram of the experimental device

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图 6 有限元模型

Figure 6. Finite element model

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图 7 A₂结构力-位移曲线及总能量吸收

Figure 7. Force-displacement curve and total energy absorption of A₂ structure

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图 8 实心腹板工字梁实验与模拟变形的对比

Figure 8. Comparison of experimental and simulated deformations of solid web I-beams

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图 9 方胞元腹板工字梁实验与模拟变形的对比

Figure 9. Comparison of experimental and simulated deformation of square cell web I-beam

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图 10 蜂窝胞元腹板工字梁实验与模拟变形的对比

Figure 10. Comparison of experimental and simulated deformation of honeycomb cell web I-beam

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图 11 内凹胞元腹板工字梁实验与模拟变形的对比

Figure 11. Comparison of experimental and simulated deformation of concave cell web I-beam

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图 12 圆胞元腹板工字梁实验与模拟变形的对比

Figure 12. Comparison of experimental and simulated deformation of circular cell web I-beams

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图 13 多孔工字梁实验和数值模拟荷载-位移曲线

Figure 13. Experimental and simulation displacement-load curves of cellular I-beams

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图 14 多孔工字梁的荷载-位移曲线

Figure 14. Load-displacement curves of cellular I-beams

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图 15 实验得到的多孔工字梁的变形

Figure 15. Deformation of cellular I-beam during experiment

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图 16 多孔工字梁的吸能及平均压溃力

Figure 16. Energy absorption and average crushing force of cellular I-beams

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