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A platform for research: civil engineering, architecture and urbanism
Out-of-plane crashworthiness of bio-inspired hierarchical diamond honeycombs with variable cell wall thickness
https://orcid.org/0000-0002-4360-2752
Abstract Recently, honeycombs with hierarchical structure or variable wall thickness have attracted more and more attention in engineering applications. Inspired by the structure of natural honeycombs, a novel bio-inspired hierarchical diamond honeycomb with variable wall thickness (HDH-VT) is proposed firstly by introducing wall thickness variation into hierarchical diamond honeycomb (HDH), and its mechanical performance and crashworthiness under out-of-plane impact are studied using an experimentally and theoretically validated finite element method. The results show that the deformation of HDH-VT can be classified into three typical modes, and the corresponding deformation mechanism is analyzed. Subsequently, comparisons of regular square honeycomb, HDH and HDH-VT are performed and illustrate that HDH-VT exhibits superior crashworthiness, and the reason for the superiority is analyzed. Moreover, the effects of basic parameters on the crashworthiness of HDH-VT are explored. Finally, theoretical models for the plateau stress of HDH and HDH-VT are derived, and theoretical predictions correspond well with the numerical results of HDH and HDH-VT with stable deformation modes.
Highlights A novel hierarchical diamond honeycomb with variable wall thickness (HDH-VT) is proposed. HDH-VT exhibits significant crashworthiness advantages than hierarchical diamond honeycomb (HDH). Theoretical models for the plateau stress of HDH and HDH-VT are derived and validated.
Out-of-plane crashworthiness of bio-inspired hierarchical diamond honeycombs with variable cell wall thickness
https://orcid.org/0000-0002-4360-2752
Abstract Recently, honeycombs with hierarchical structure or variable wall thickness have attracted more and more attention in engineering applications. Inspired by the structure of natural honeycombs, a novel bio-inspired hierarchical diamond honeycomb with variable wall thickness (HDH-VT) is proposed firstly by introducing wall thickness variation into hierarchical diamond honeycomb (HDH), and its mechanical performance and crashworthiness under out-of-plane impact are studied using an experimentally and theoretically validated finite element method. The results show that the deformation of HDH-VT can be classified into three typical modes, and the corresponding deformation mechanism is analyzed. Subsequently, comparisons of regular square honeycomb, HDH and HDH-VT are performed and illustrate that HDH-VT exhibits superior crashworthiness, and the reason for the superiority is analyzed. Moreover, the effects of basic parameters on the crashworthiness of HDH-VT are explored. Finally, theoretical models for the plateau stress of HDH and HDH-VT are derived, and theoretical predictions correspond well with the numerical results of HDH and HDH-VT with stable deformation modes.
Highlights A novel hierarchical diamond honeycomb with variable wall thickness (HDH-VT) is proposed. HDH-VT exhibits significant crashworthiness advantages than hierarchical diamond honeycomb (HDH). Theoretical models for the plateau stress of HDH and HDH-VT are derived and validated.
Out-of-plane crashworthiness of bio-inspired hierarchical diamond honeycombs with variable cell wall thickness
https://orcid.org/0000-0002-4360-2752
Abstract Recently, honeycombs with hierarchical structure or variable wall thickness have attracted more and more attention in engineering applications. Inspired by the structure of natural honeycombs, a novel bio-inspired hierarchical diamond honeycomb with variable wall thickness (HDH-VT) is proposed firstly by introducing wall thickness variation into hierarchical diamond honeycomb (HDH), and its mechanical performance and crashworthiness under out-of-plane impact are studied using an experimentally and theoretically validated finite element method. The results show that the deformation of HDH-VT can be classified into three typical modes, and the corresponding deformation mechanism is analyzed. Subsequently, comparisons of regular square honeycomb, HDH and HDH-VT are performed and illustrate that HDH-VT exhibits superior crashworthiness, and the reason for the superiority is analyzed. Moreover, the effects of basic parameters on the crashworthiness of HDH-VT are explored. Finally, theoretical models for the plateau stress of HDH and HDH-VT are derived, and theoretical predictions correspond well with the numerical results of HDH and HDH-VT with stable deformation modes.
Highlights A novel hierarchical diamond honeycomb with variable wall thickness (HDH-VT) is proposed. HDH-VT exhibits significant crashworthiness advantages than hierarchical diamond honeycomb (HDH). Theoretical models for the plateau stress of HDH and HDH-VT are derived and validated.
Out-of-plane crashworthiness of bio-inspired hierarchical diamond honeycombs with variable cell wall thickness
Wen, Weibin (author) / Lei, Ming (author) / Tao, Yong (author) / Lian, Yanping (author)
Thin-Walled Structures ; 176
2022-04-19
Article (Journal)
Electronic Resource
English
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