Finite Element Analysis of Three-Dimensional (3D) Auxetic Textile Composite under Compression.

Jifang Zeng,Hong Hu

doi:10.3390/polym10040374

Abstract

This paper reports a finite element (FE) analysis of three-dimensional (3D) auxetic textile composite by using commercial software ANSYS 15 under compression. The two-dimensional (2D) FE model was first developed and validated by experiment. Then, the validated model was used to evaluate effects of structural parameters and constituent material properties. For the comparison, 3D non-auxetic composite that was made with the same constituent materials and structural parameters, but with different yarn arrangement in the textile structure was also analyzed at the same time. The analysis results showed that the auxetic and non-auxetic composites have different compression behaviors and the auxetic composite has better the energy absorption capacity than the non-auxetic composite under the same compression stress. The study has provided us a guidance to design and fabricate auxetic composites with the required mechanical behavior by appropriately selecting structural parameters and constituent materials.

Highlights

Auxetic composites are a special type of materials with negative Poisson’s ratio (PR), which expand when stretched and vice versa
The finite element (FE) simulation is first verified by the compression results of both the auxetic and non-auxetic composites that were obtained in our previous study [2]
Based on the above comparison, it can be confirmed that the FE models for both the auxetic and non-auxetic composites are suitable for characterizing their compression behavior

Summary

Introduction

Auxetic composites are a special type of materials with negative Poisson’s ratio (PR), which expand when stretched and vice versa. According to Alderson et al [4], two approaches could be adopted for the fabrication of auxetic composites. The first one is using specially designed configurations with non-auxetic constituent materials (reinforcement and matrix) and the other is to include auxetic elements in a composite or use auxetic constituents, for example, auxetic matrix, auxetic reinforcement, or both [2,5,6]. With regard to the first approach, the composites fabricated with non-auxetic materials by using specially designed configurations are laminates [7,8,9,10]. Alderson et al [12]

Methods

Results

Conclusion