Inicio  /  Applied Sciences  /  Vol: 13 Par: 14 (2023)  /  Artículo
ARTÍCULO
TITULO

Compressive Behavior of a Novel Hexagonal Nodes-Based 3D Chiral Auxetic Structure

Dianwei Gao    
Chunwei Zhang and Jianhua Zhang    

Resumen

The energy absorption capacity of materials with negative Poisson?s ratio (NPR) is attracting interest from both industry and academia due to the excellent impact resistance of the local shrinkage of materials. However, understanding the compressive behavior of 3D auxetic structures at different strain rates and developing design methods are challenging tasks due to the limited literature and insufficient data. This paper presents a study on the behavior of Poisson?s ratio of an advanced 3D chiral structure, which is formed of two orthogonally positioned 2D hexagonal nodes-based chiral structures. Firstly, both theoretical analysis and numerical simulations are conducted to identify the Poisson?s ratio of 2D chiral structures. The same theoretical value of -1 is obtained for 2D chiral structures with a bending-dominated ligaments assumption. Thereafter, the Poisson?s ratio of 3D chiral structures is determined numerically using a low-speed loaded model composed of 5 × 5 × 8 3D unit cells for eliminating the boundary effects. The results show that impact velocity can strongly affect the energy absorption and deformation behavior of the proposed 3D chiral structure. Increasing the beam radius results in reduced energy absorption capability. However, the energy absorption capability of the 3D chiral structure is not sensitive to the yield strength of nodes. Impact direction affects the energy absorption performance of the 3D chiral structure, depending on the crushing strain. The research results could be used to optimize the design of the proposed novel 3D chiral honeycombs for various applications, such as impact energy absorbers and vibration-resistant dampers.

 Artículos similares

       
 
Subin Kim, Heejin Hwang, Keunyeong Oh and Jiuk Shin    
The seismically deficient column details in existing reinforced concrete buildings affect the overall behavior of the building depending on the failure type of the column. The purpose of this study is to develop and validate a machine-learning-based pred... ver más
Revista: Applied Sciences

 
Ibrahim Baran Karasin    
Ensuring the safety and stability of buildings during earthquakes is of utmost importance. This can be achieved by assessing the seismic performance of reinforced concrete structures with consideration of design details. This study focused on the seismic... ver más
Revista: Applied Sciences

 
Kai Qin, Renjun Yan, Wei Shen and Siyuan Gui    
This paper studies the compressive failure behavior of pw-GFRP (plain-woven glass fiber reinforced polymer) sandwich composite L-joints for ships. Six L-joint specimens were subjected to ultimate compressive tests, which show that damage and stiffness de... ver más

 
Jian-Tao Wang, Xiang-Hong Liu, Qing Sun and Yu-Wei Li    
Upon the higher requirement on high-performance structures of large-scale supporting structures of offshore wind turbines, the systematic analysis on the compressive-flexural behavior and ultimate bearing capacity of tapered concrete-filled double skin s... ver más

 
Gustavo Henrique Nalon, José Carlos Lopes Ribeiro, Leonardo Gonçalves Pedroti, Roberto Marcio da Silva, Eduardo Nery Duarte de Araújo, Rodrigo Felipe Santos and Gustavo Emilio Soares de Lima    
The structural performance of civil engineering infrastructures exposed to elevated temperatures has been investigated in many recent works. Some of these studies evaluated the residual mechanical behavior of masonry prisms subjected to high temperatures... ver más
Revista: Infrastructures