Volume 44 Issue 1
Jan.  2023
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ZHOU Shiqi, HOU Xiuhui, DENG Zichen. Buckling Analysis of Re-Entrant Honeycomb Structures Under General Macroscopic Stress States[J]. Applied Mathematics and Mechanics, 2023, 44(1): 12-24. doi: 10.21656/1000-0887.430202
Citation: ZHOU Shiqi, HOU Xiuhui, DENG Zichen. Buckling Analysis of Re-Entrant Honeycomb Structures Under General Macroscopic Stress States[J]. Applied Mathematics and Mechanics, 2023, 44(1): 12-24. doi: 10.21656/1000-0887.430202

Buckling Analysis of Re-Entrant Honeycomb Structures Under General Macroscopic Stress States

doi: 10.21656/1000-0887.430202
  • Received Date: 2022-06-13
  • Rev Recd Date: 2022-07-08
  • Available Online: 2023-01-07
  • Publish Date: 2023-01-15
  • Based on the negative Poisson’s ratio effect of the re-entrant honeycomb, the finite element simulation of its buckling mechanical properties was carried out, and 2 buckling modes other than those of the traditional hexagonal honeycomb structures were obtained. The beam-column theory was applied to analyze the buckling strength and mechanism of the 2 buckling modes, where the equilibrium equations including the beam end bending moments and rotation angles were established. The stability equation was built through application of the buckling critical condition, and then the analytical expression of the buckling strength was obtained. The re-entrant honeycomb specimen was printed with the additive manufacturing technology, and its buckling performance was verified by experiments. The results show that, the buckling modes vary significantly under different biaxial loading conditions; the re-entrant honeycomb would buckle under biaxial tension due to the auxetic effect, being quite different from the traditional honeycomb structure; the typical buckling bifurcation phenomenon emerges in the analysis of the buckling failure surfaces under biaxial stress states. This research provides a significant guide for the study on the failure of re-entrant honeycomb structures due to instability, and the active application of this instability to achieve special mechanical properties.

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