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Comparative study
of graded honeycombs with various cellular structures under
impacting load
Jianwei Ren, Jun Hu and Aiguo Wang |
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Vol. 17 (2022), No. 1, 1–18
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Abstract |
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Inspired by the cellular materials in nature, we studied the effect of the gradient of cell distribution on the mechanical properties of honeycombs by using the finite element methodology. Four honeycombs, namely regular honeycombs, linear graded honeycombs, and two nonlinear graded honeycombs, were modeled. An indicator of deformation uniformity was proposed to characterize the dynamic deformation status of various honeycomb structures. The dynamic responses, including crushing mode, stress-strain relation, and energy absorption, were compared by changing the type of cell distribution and impact velocity. It is found that the honeycomb with the nonlinear graded cellular structure possesses a smoother crushing process due to the existence of a high-density frame. Nonlinear graded honeycombs present better dynamic performances at lower impacting velocity, like plateau stress and energy absorption. When the loading velocity is higher, the nonlinear graded honeycombs have more stable dynamic responses than the regular honeycomb, like plateau stress, dynamic increment factor, and specific energy absorption. |
Keywords
honeycomb materials, nonlinear graded distribution, dynamic
crushing mode, deformation uniformity indicator, energy
absorption
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Milestones
Received: 23 December 2018
Revised: 8 August 2021
Accepted: 10 October 2021
Published: 17 September 2022
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Authors |
| Jianwei Ren | |
| Multifunctional Lightweight
Materials and Structure Research Center Nanjing University of Aeronautics and Astronautics Nanjing China |
Key Laboratory of Building Structure
and Underground Engineering of Anhui Province Anhui Jianzhu University Hefei China |
| Jun Hu | |
| Key Laboratory of Building Structure
and Underground Engineering of Anhui Province Anhui Jianzhu University Hefei China |
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| Aiguo Wang | |
| Key Laboratory of Advanced Building
Materials of Anhui Province Anhui Jianzhu University Hefei China |
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