Micromechanics Modelling of Graphene Platelets Reinforced Polymer Composite Materials With Imperfect Interfaces

Azoti, Wiyao Leleng and Elmarakbi, Ahmed (2016) Micromechanics Modelling of Graphene Platelets Reinforced Polymer Composite Materials With Imperfect Interfaces. In: IMECE 2016 - ASME 2016 International Mechanical Engineering Congress and Exposition, 11th - 17th November 2016, Phoenix, United States.

Full text not available from this repository.
Official URL: http://dx.doi.org/10.1115/IMECE2016-65876

Abstract

This work investigates the elasto-plastic response of platelets-like inclusions reinforced polymer composites showing an imperfect interface. The solution of the heterogeneous material problem is solved through a kinematic integral equation. To account for the interfacial behaviour, a linear spring model LSM is adopted, leading to an expression of the modified Eshelby's tensor. As a consequence, the interfacial contributions with respect to the strain concentration tensor within each phase as well as in the average strain field are described by a modified version of the Mori-Tanaka scheme for the overall response. The non-linear response is established in the framework of the J2 flow rule. An expression of the algorithmic tangent operator for each phase can be obtained and used as uniform modulus for homogenisation purpose. Numerical results are conducted on graphene platelets GPL-reinforced polymer PA6 composite for several design parameters such as GPL volume fraction, aspect ratio and the interfacial compliance. These results clearly highlight the impact of the aspect ratio as well as the volume fraction by a softening in the overall response when imperfection is considered at the interface. Present developments are analytical-based solutions. They constitute a theoretical framework for further multi-scale applications in automotive. The crashworthiness simulation incorporating an influence of the interfacial behaviour on the strain energy absorption SEA is of interest.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Polymer composites, Micromechanics (Engineering), Modeling, Graphene, Platelets
Subjects: F200 Materials Science
H300 Mechanical Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Paul Burns
Date Deposited: 09 Oct 2018 11:01
Last Modified: 09 Oct 2018 11:01
URI: http://nrl.northumbria.ac.uk/id/eprint/36176

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