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A platform for research: civil engineering, architecture and urbanism
Experimental and numerical research on foam filled re-entrant cellular structure with negative Poisson's ratio
https://orcid.org/0000-0003-2520-0677
https://orcid.org/0000-0003-1473-7364
https://orcid.org/0000-0001-7099-0247
https://orcid.org/0000-0002-7357-1125
https://orcid.org/0000-0002-8930-3547
https://orcid.org/0000-0003-3746-6608
Abstract Mechanical behaviors of a new foam filled 2D re-entrant hexagonal honeycomb with negative Poisson's ratio under planar compression have been investigated in this paper. Re-entrant hexagonal unit cell specimens were fabricated by aluminum alloy and polyurethane foam. The deformation modes and force-displacement curves of the unit cell specimens under compression were carried out experimentally and numerically, and a good agreement was observed between experimental results and numerical simulation results. Subsequently, mechanical behaviors of foam filled and void re-entrant hexagonal honeycomb under planar compression were observed by numerical simulation. Compared to the void honeycomb, the foam filled honeycomb has a higher specific energy absorption capability due to a higher plateau stress. According to the mechanism of auxetic effect, the re-entrant honeycomb would move inward when subjected to compression along the orthogonal direction, which cause a biaxial compression of the foam and an increasing of stiffness/strength/energy absorption capability. The present investigations provide thorough insight into the strengthened re-entrant hexagonal cellular honeycomb, and could be used in the development of novel light weight smart functional structures.
Graphical abstract Display Omitted
Highlights A new foam filled 2D re-entrant hexagonal honeycomb with negative Poisson's ratio topology is proposed. Auxetic behavior of foam filled re-entrant honeycomb is presented. Excellent specific energy absorption of the foam filled honeycomb due to higher plateau stress is presented.
Experimental and numerical research on foam filled re-entrant cellular structure with negative Poisson's ratio
https://orcid.org/0000-0003-2520-0677
https://orcid.org/0000-0003-1473-7364
https://orcid.org/0000-0001-7099-0247
https://orcid.org/0000-0002-7357-1125
https://orcid.org/0000-0002-8930-3547
https://orcid.org/0000-0003-3746-6608
Abstract Mechanical behaviors of a new foam filled 2D re-entrant hexagonal honeycomb with negative Poisson's ratio under planar compression have been investigated in this paper. Re-entrant hexagonal unit cell specimens were fabricated by aluminum alloy and polyurethane foam. The deformation modes and force-displacement curves of the unit cell specimens under compression were carried out experimentally and numerically, and a good agreement was observed between experimental results and numerical simulation results. Subsequently, mechanical behaviors of foam filled and void re-entrant hexagonal honeycomb under planar compression were observed by numerical simulation. Compared to the void honeycomb, the foam filled honeycomb has a higher specific energy absorption capability due to a higher plateau stress. According to the mechanism of auxetic effect, the re-entrant honeycomb would move inward when subjected to compression along the orthogonal direction, which cause a biaxial compression of the foam and an increasing of stiffness/strength/energy absorption capability. The present investigations provide thorough insight into the strengthened re-entrant hexagonal cellular honeycomb, and could be used in the development of novel light weight smart functional structures.
Graphical abstract Display Omitted
Highlights A new foam filled 2D re-entrant hexagonal honeycomb with negative Poisson's ratio topology is proposed. Auxetic behavior of foam filled re-entrant honeycomb is presented. Excellent specific energy absorption of the foam filled honeycomb due to higher plateau stress is presented.
Experimental and numerical research on foam filled re-entrant cellular structure with negative Poisson's ratio
https://orcid.org/0000-0003-2520-0677
https://orcid.org/0000-0003-1473-7364
https://orcid.org/0000-0001-7099-0247
https://orcid.org/0000-0002-7357-1125
https://orcid.org/0000-0002-8930-3547
https://orcid.org/0000-0003-3746-6608
Abstract Mechanical behaviors of a new foam filled 2D re-entrant hexagonal honeycomb with negative Poisson's ratio under planar compression have been investigated in this paper. Re-entrant hexagonal unit cell specimens were fabricated by aluminum alloy and polyurethane foam. The deformation modes and force-displacement curves of the unit cell specimens under compression were carried out experimentally and numerically, and a good agreement was observed between experimental results and numerical simulation results. Subsequently, mechanical behaviors of foam filled and void re-entrant hexagonal honeycomb under planar compression were observed by numerical simulation. Compared to the void honeycomb, the foam filled honeycomb has a higher specific energy absorption capability due to a higher plateau stress. According to the mechanism of auxetic effect, the re-entrant honeycomb would move inward when subjected to compression along the orthogonal direction, which cause a biaxial compression of the foam and an increasing of stiffness/strength/energy absorption capability. The present investigations provide thorough insight into the strengthened re-entrant hexagonal cellular honeycomb, and could be used in the development of novel light weight smart functional structures.
Graphical abstract Display Omitted
Highlights A new foam filled 2D re-entrant hexagonal honeycomb with negative Poisson's ratio topology is proposed. Auxetic behavior of foam filled re-entrant honeycomb is presented. Excellent specific energy absorption of the foam filled honeycomb due to higher plateau stress is presented.
Experimental and numerical research on foam filled re-entrant cellular structure with negative Poisson's ratio
Yu, Rong (author) / Luo, Wei (author) / Yuan, Hua (author) / Liu, Jingxi (author) / He, Wentao (author) / Yu, Zixian (author)
Thin-Walled Structures ; 153
2020-02-16
Article (Journal)
Electronic Resource
English
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