Numerical analysis of composite structure with in-plane isotropic negative Poisson’s ratio: effects of materials properties and geometry features of inclusions
journal contributionposted on 30.06.2017, 10:15 by Xiaonan Hou, Hong Hu, Vadim Silberschmidt
A novel composite structure with isotropic negative Poisson's ratio has been presented in our previous paper . However, the previous study has only focused on the effects of random inclusions. In this work, an extended numerical study on the effects of materials properties and geometry features of inclusions is conducted in order to better understand the deformation mechanism and mechanical properties of this kind of composites. Using finite element method, the overall negative Poisson's ratio effects and mechanical properties of the composites are analyzed in terms of different factors including thickness and stiffness of inclusions with uniform and non-uniform struts. The structure optimization of the composites with better negative Poisson's ratio effect and mechanical performance are discussed based on the numerical calculated results. The study shows that the Poisson's ratio effects and mechanical properties of the composites are significantly affected by geometrical features, stiffness and boundary conditions of inclusions.
The authors would like to thank the funding support from the Research Grants Council of Hong Kong Special Administrative Region Government in the form of a GRF project (Grant Number 516510).
- Mechanical, Electrical and Manufacturing Engineering