A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
In-plane compression of 3D-printed self-similar hierarchical honeycombs – Static and dynamic analysis
https://orcid.org/0000-0002-6456-4599
Abstract In-plane collapse behaviors of second-order wood-inspired hierarchical honeycombs (replace each solid side of a conventional honeycomb with a wall comprising smaller hexagons) under quasi-static and dynamic in-plane compression were examined via experiments and finite element (FE) simulation. Analytical formula for the initial crushing strength and plateau crushing force were also developed. Compared to the conventional honeycomb, a hierarchical honeycomb displays a higher mean post-yield crushing stress, although its specific energy absorption is slightly lower. Their initial phase of energy dissipation is linked to the rotation and shortening/compression of the inclined hierarchical walls. Due to less catastrophic collapse of the smaller first-order cells, the plateau stress phase is more stable and gradual overall hardening is evident in the stress-strain curve. Under dynamic loading, the initial peak force and subsequent plateau force are elevated. There are three types of responses – quasi-static, transition/progressive and dynamic – depending on the magnitude of the impact velocity.
Highlights In-plane collapse behaviors of second-order wood-inspired 3D-printed self-similar hierarchical honeycombs were studied. Digital image correlation (Vic-2D) was employed to identify the strain distribution on the cell walls. The first-order shear bands and second-order densification zone were firstly proposed. Analytical formulas for the initial crushing strength and plateau crushing force were developed. Hierarchical honeycombs display a significantly higher mean post-yield crushing stress than the conventional honeycombs.
In-plane compression of 3D-printed self-similar hierarchical honeycombs – Static and dynamic analysis
https://orcid.org/0000-0002-6456-4599
Abstract In-plane collapse behaviors of second-order wood-inspired hierarchical honeycombs (replace each solid side of a conventional honeycomb with a wall comprising smaller hexagons) under quasi-static and dynamic in-plane compression were examined via experiments and finite element (FE) simulation. Analytical formula for the initial crushing strength and plateau crushing force were also developed. Compared to the conventional honeycomb, a hierarchical honeycomb displays a higher mean post-yield crushing stress, although its specific energy absorption is slightly lower. Their initial phase of energy dissipation is linked to the rotation and shortening/compression of the inclined hierarchical walls. Due to less catastrophic collapse of the smaller first-order cells, the plateau stress phase is more stable and gradual overall hardening is evident in the stress-strain curve. Under dynamic loading, the initial peak force and subsequent plateau force are elevated. There are three types of responses – quasi-static, transition/progressive and dynamic – depending on the magnitude of the impact velocity.
Highlights In-plane collapse behaviors of second-order wood-inspired 3D-printed self-similar hierarchical honeycombs were studied. Digital image correlation (Vic-2D) was employed to identify the strain distribution on the cell walls. The first-order shear bands and second-order densification zone were firstly proposed. Analytical formulas for the initial crushing strength and plateau crushing force were developed. Hierarchical honeycombs display a significantly higher mean post-yield crushing stress than the conventional honeycombs.
In-plane compression of 3D-printed self-similar hierarchical honeycombs – Static and dynamic analysis
https://orcid.org/0000-0002-6456-4599
Abstract In-plane collapse behaviors of second-order wood-inspired hierarchical honeycombs (replace each solid side of a conventional honeycomb with a wall comprising smaller hexagons) under quasi-static and dynamic in-plane compression were examined via experiments and finite element (FE) simulation. Analytical formula for the initial crushing strength and plateau crushing force were also developed. Compared to the conventional honeycomb, a hierarchical honeycomb displays a higher mean post-yield crushing stress, although its specific energy absorption is slightly lower. Their initial phase of energy dissipation is linked to the rotation and shortening/compression of the inclined hierarchical walls. Due to less catastrophic collapse of the smaller first-order cells, the plateau stress phase is more stable and gradual overall hardening is evident in the stress-strain curve. Under dynamic loading, the initial peak force and subsequent plateau force are elevated. There are three types of responses – quasi-static, transition/progressive and dynamic – depending on the magnitude of the impact velocity.
Highlights In-plane collapse behaviors of second-order wood-inspired 3D-printed self-similar hierarchical honeycombs were studied. Digital image correlation (Vic-2D) was employed to identify the strain distribution on the cell walls. The first-order shear bands and second-order densification zone were firstly proposed. Analytical formulas for the initial crushing strength and plateau crushing force were developed. Hierarchical honeycombs display a significantly higher mean post-yield crushing stress than the conventional honeycombs.
In-plane compression of 3D-printed self-similar hierarchical honeycombs – Static and dynamic analysis
Li, Shiqiang (author) / Liu, Zhifang (author) / Shim, V.P.W. (author) / Guo, Yangbo (author) / Sun, Zhengping (author) / Li, Xin (author) / Wang, Zhihua (author)
Thin-Walled Structures ; 157
2020-07-21
Article (Journal)
Electronic Resource
English
In-plane compression of graded hierarchical honeycombs
| SAGE Publications | 2022
Out-of-plane crashworthiness of bio-inspired self-similar regular hierarchical honeycombs
| British Library Online Contents | 2016
Hierarchical composite honeycombs
| Elsevier | 2012
Hierarchical composite honeycombs
| British Library Online Contents | 2012