力学与实践 ›› 2022, Vol. 44 ›› Issue (4): 857-867.DOI: 10.6052/1000-0879-21-516

• 应用研究 • 上一篇    下一篇

梯度蜂窝加筋板的弯曲变形及优化设计

张晨帆(), 邓庆田(), 李新波, 宋学力   

  1. 长安大学理学院,西安 710064
  • 收稿日期:2021-11-23 出版日期:2022-08-08 发布日期:2022-08-17
  • 作者简介:张晨帆,硕士研究生,研究方向为多孔材料与结构力学性能。E-mail: 2020112054@chd.edu.cn
    邓庆田(通信作者),副教授,主要从事多孔材料与结构力学性能、损伤检测研究。E-mail: dengqt@chd.edu.cn
  • 基金资助:
    中央高校基本科研业务费用专项资金资助项目(310812163504)。

BENDING DEFORMATION AND OPTIMAL DESIGN OF GRADIENT HONEYCOMB STIFFENED PANEL

ZHANG Chenfan(), DENG Qingtian(), LI Xinbo, SONG Xueli   

  1. School of Science, Chang'an University, Xi'an 710064, China
  • Received:2021-11-23 Online:2022-08-08 Published:2022-08-17

摘要:

将多胞壁蜂窝结构引入加筋板设计中。基于三点弯曲实验的承载方式,将蜂窝胞元的壁厚与孔隙率设计为梯度形式。实验试件采用3D打印机制备,基材为聚乳酸。通过实验测试与有限元分析,研究了梯度形式、胞元方向及承载位置对结构承载性能的影响,并基于结果对加筋层进行了优化设计。结果表明:采取壁厚梯度形式、胞元竖直方向以及使压头轴线靠近水平方向均可提升结构承载性能,优化加筋层后能显著提升材料的利用率。此外,不同压头位置下试件的破坏模式不同。

关键词: 梯度形式, 蜂窝胞元, 加筋层, 承载性能

Abstract:

The multi-cell-wall honeycomb structure was introduced into the stiffened plate design. Based on the load-bearing method of the three-point bending experiment, the wall thickness and porosity of the honeycomb cells were designed in a gradient form. The specimens were manufactured by 3D printing technology, and the materials was polylactic acid. Through experimental testing and finite element analysis, the influence of gradient form, cell direction and bearing position on the structure's bearing performance was studied, and the stiffened layer was optimized based on the results. The results show that: the gradient form of wall thickness, the vertical direction of the cell and the closeness of the indenter axis to the horizontal direction can all improve the structural bearing performance; the optimization to stiffened layer can significantly improve the utilization rate of the materials. In addition, the specimens under different bearing positions have different destruction modes.

Key words: gradient form, honeycomb cell, stiffened layer, load-bearing performance

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