Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
A novel hybrid auxetic honeycomb with enhanced load-bearing and energy absorption properties
https://orcid.org/0000-0003-4801-763X
Graphical abstract Display Omitted
Highlights A new auxetic honeycomb was designed by hybriding rhombic and star configurations. A theoretical model was developed to predict the elastic modulus and Poisson's ratio. The proposed honeycomb possesses higher auxetic effect and larger specific modulus than the star honeycomb. The proposed honeycomb exhibits enhanced plateau stress and specific energy absorption compared with conventional auxetic honeycombs.
Abstract Auxetic structures with negative Poisson's ratio exhibit excellent performance in cushioning, shear resistance and energy absorption, but their load-bearing capacity is usually poor. To address this drawback of the conventional Auxetic structure, a star-rhombic honeycomb (SRH) design is proposed in this paper to improve its load-bearing capacity. Analytical models of the elastic modulus and Poisson's ratio of this structure for different loading directions are developed. Quasi-static compression experiments were conducted on SRH specimens fabricated by selective laser melting (SLM) technique. Good agreement was achieved between the simulated and experimental stress response curves and deformation patterns. It was found that the SRH structure possessed better elastic modulus and energy absorption capacity than the SH structure without sacrificing the auxetic properties. The elastic modulus and Poisson's ratio of SRH under the x loading direction are more sensitive to the changes of structural parameters. An optimum energy absorption performance is achieved for an appropriate ratio of the inner rhombic strut thickness to outer reentrant strut thickness (k = 0.5). The specific energy absorption of SRH is improved by 136% and 75% compared to that of the conventional reentrant honeycomb (RH) and star honeycomb (SH), respectively. It has advantages for application scenarios with requirements for both auxetic and load bearing properties.
A novel hybrid auxetic honeycomb with enhanced load-bearing and energy absorption properties
https://orcid.org/0000-0003-4801-763X
Graphical abstract Display Omitted
Highlights A new auxetic honeycomb was designed by hybriding rhombic and star configurations. A theoretical model was developed to predict the elastic modulus and Poisson's ratio. The proposed honeycomb possesses higher auxetic effect and larger specific modulus than the star honeycomb. The proposed honeycomb exhibits enhanced plateau stress and specific energy absorption compared with conventional auxetic honeycombs.
Abstract Auxetic structures with negative Poisson's ratio exhibit excellent performance in cushioning, shear resistance and energy absorption, but their load-bearing capacity is usually poor. To address this drawback of the conventional Auxetic structure, a star-rhombic honeycomb (SRH) design is proposed in this paper to improve its load-bearing capacity. Analytical models of the elastic modulus and Poisson's ratio of this structure for different loading directions are developed. Quasi-static compression experiments were conducted on SRH specimens fabricated by selective laser melting (SLM) technique. Good agreement was achieved between the simulated and experimental stress response curves and deformation patterns. It was found that the SRH structure possessed better elastic modulus and energy absorption capacity than the SH structure without sacrificing the auxetic properties. The elastic modulus and Poisson's ratio of SRH under the x loading direction are more sensitive to the changes of structural parameters. An optimum energy absorption performance is achieved for an appropriate ratio of the inner rhombic strut thickness to outer reentrant strut thickness (k = 0.5). The specific energy absorption of SRH is improved by 136% and 75% compared to that of the conventional reentrant honeycomb (RH) and star honeycomb (SH), respectively. It has advantages for application scenarios with requirements for both auxetic and load bearing properties.
A novel hybrid auxetic honeycomb with enhanced load-bearing and energy absorption properties
https://orcid.org/0000-0003-4801-763X
Graphical abstract Display Omitted
Highlights A new auxetic honeycomb was designed by hybriding rhombic and star configurations. A theoretical model was developed to predict the elastic modulus and Poisson's ratio. The proposed honeycomb possesses higher auxetic effect and larger specific modulus than the star honeycomb. The proposed honeycomb exhibits enhanced plateau stress and specific energy absorption compared with conventional auxetic honeycombs.
Abstract Auxetic structures with negative Poisson's ratio exhibit excellent performance in cushioning, shear resistance and energy absorption, but their load-bearing capacity is usually poor. To address this drawback of the conventional Auxetic structure, a star-rhombic honeycomb (SRH) design is proposed in this paper to improve its load-bearing capacity. Analytical models of the elastic modulus and Poisson's ratio of this structure for different loading directions are developed. Quasi-static compression experiments were conducted on SRH specimens fabricated by selective laser melting (SLM) technique. Good agreement was achieved between the simulated and experimental stress response curves and deformation patterns. It was found that the SRH structure possessed better elastic modulus and energy absorption capacity than the SH structure without sacrificing the auxetic properties. The elastic modulus and Poisson's ratio of SRH under the x loading direction are more sensitive to the changes of structural parameters. An optimum energy absorption performance is achieved for an appropriate ratio of the inner rhombic strut thickness to outer reentrant strut thickness (k = 0.5). The specific energy absorption of SRH is improved by 136% and 75% compared to that of the conventional reentrant honeycomb (RH) and star honeycomb (SH), respectively. It has advantages for application scenarios with requirements for both auxetic and load bearing properties.
A novel hybrid auxetic honeycomb with enhanced load-bearing and energy absorption properties
Li, Lingbo (Autor:in) / Yang, Fan (Autor:in) / Zhang, Siyuan (Autor:in) / Guo, Zhengmiao (Autor:in) / Wang, Lihua (Autor:in) / Ren, Xin (Autor:in) / Zhao, Min (Autor:in)
Engineering Structures ; 289
14.05.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
A novel star auxetic honeycomb with enhanced in-plane crushing strength
| Elsevier | 2020
A novel auxetic honeycomb with enhanced in-plane stiffness and buckling strength
| British Library Online Contents | 2017
A novel re-entrant auxetic honeycomb with enhanced in-plane impact resistance
| British Library Online Contents | 2019