Bioinspired engineering of honeycomb structure – Using nature to inspire human innovation

Innovative honeycomb-based structures have been paid substantial attention in recent years due to their superb mechanical performances and specific functions. The presented study made acomprehensive overview on the development of the innovative honeycomb-based structures in the past two decades, including filled-type, embedded, tandem, hierarchical, auxetics with Negative Poisson's Ratio (NPR), etc. Mechanical performances of these structures were commented with advantages and disadvantages, related on their geometric configurations, mechanical performance and dynamic response, respectively. The challenges as well as future directions were also analyzed. The achievements provide significant guidelines in designing of new generation light-weight honeycomb-based structures.

Recent advances in novel metallic honeycomb structure

https://docs.lib.purdue.edu/cgi/viewcontent.cgi?article=1013&context=iutam

3D Printed Hierarchical Honeycombs with Shape Integrity under Large Compressive Deformations

Out-of-plane crashworthiness of bio-inspired self-similar regular hierarchical honeycombs

Investigation on manufacturing and mechanical behavior of all-composite sandwich structure with Y-shaped cores

Hierarchical composite honeycombs

Mechanical property of lattice truss material in sandwich panel including strut flexural deformation

Three-point bending tests were conducted to reveal the failure mechanisms of the three-dimensional WTSC. Sixteen groups of experiments were designed and performed based on the orthotropic core structure and different thicknesses of the two skins. Bended along the weft direction, skin yielding and crimpling renders WTSC ductile failure mode. Bended along the warp direction, skin cracking renders WTSC brittle–ductile failure mode, while core shearing renders a quasi-brittle mode. After the initial failure, the progression of plastic hinges renders WTSC residual load capacity in a long deformation plateau, while fractures of lower skins lead to complete and abrupt failures. According to the experiments, failure mechanisms of WTSC include skin fracture, skin yielding, skin crimpling, tensile failure, indentation, and core shearing. Strength of the skins and the core in the warp and weft directions were predicted. The woven skin and the woven core are stronger in the weft direction. These failure mechanisms le...

Hualin Fan

Papers

Hierarchical composite honeycombs

Mechanical property of lattice truss material in sandwich panel including strut flexural deformation

Flexural failure mechanisms of three-dimensional woven textile sandwich panels: Experiments