Meso-scale finite element modelling of carbon nanotube reinforced polymer composites

Haydar, Altay
Carbon nanotube (CNT) reinforced polymer composites (CNTRPs) are promising materials which can be utilized in a variety of industries. Several experimental research studies have been conducted to determine the mechanical properties of CNTRPs, however results have not been conclusive. In this study, meso-scale representative volume elements (RVEs) of straight and coiled CNT (CCNT) reinforced epoxy composites were analysed by using commercial finite element analysis software MSC Marc-Mentat. CNTs were randomly distributed and oriented inside the RVE by using developed C++ code. The interface region between CNT and epoxy was modelled by exploiting Cohesive Zone Modelling (CZM) feature of Marc. Weak van der Waals interaction between CNT and epoxy is considered. In randomly oriented CNTs case, increasing CNT volume fraction, CCNT helix angle, and CCNT number of revolutions had positive effects on elastic properties of CNTRP while increasing CNT diameter had detrimental effects. In aligned CNTs case, CNTRP had improved mechanical property in the alignment direction. End structure of CNT (blunt or capped) did not have any significant effect on the elastic properties of CNTRP. Maximum Von Mises stress and maximum elastic strain in CNT showed an increasing trend with raise in CNT volume fraction. Rise in CCNT helix angle slightly increased CNTRP’s Poisson’s ratio while increasing CCNT number of revolutions and CNT diameter did the exactly opposite. The results obtained from finite element analyses (FEAs) were compared with well-known analytical micromechanics models. This study claims to have developed a novel CCNT reinforced epoxy composite finite element model.


Zuberi, Muhammad Jibran Shahzad; Esat, Volkan (2014-06-27)
Carbon nanotubes (CNTs) are considered to be one of the contemporary materials exhibiting superior mechanical, thermal and electrical properties. A new generation state-of-the-art composite material, carbon nanotube reinforced polymer (CNTRP), utilizes carbon nanotubes as the reinforcing fibre element. CNTRPs are highly promising composite materials possessing the potential to be used in various areas such as automotive, aerospace, defence, and energy sectors.
Sonat, Emine Evren; Özerinç, Sezer; Department of Mechanical Engineering (2021-12-10)
Carbon fiber reinforced polymer (CFRP) composites are increasingly used in the aerospace industry due to their high specific strength compared to conventional metallic materials. However, a significant shortcoming of these composites is their increased susceptibility to damage. Structural repair is a common method to restore the load-carrying capacity of a damaged part when the damage size exceeds the pre-defined tolerances. Scarf and stepped bonded repair methods are the primary choice for cases that requi...
Density functional theory and molecular dynamics simulations of carbon nanotubes, polyetheretherketone and their interfaces
Toraman, Gözdenur; Toffoli, Hande; Gürses, Ercan; Department of Physics (2018)
Carbon nanotubes are allotropes of carbon with a cylindrical nanostructure. A nanotube can roughly be described as a rolled-up graphene sheet, which is a two dimensional hexagonal arrangement of carbon atoms, often referred to as a honeycomb lattice. Carbon nanotubes, much like their parent material graphene, are characterized by high strength, high Young modulus, durability and tunable electronic behavior. As a result of these superior properties, CNTs have been used in diverse technologically relevant app...
Modelling and analyis of multı-walled carbon nanotube reinforced polymer composites
Fatima, Bushra; Esat, Volkan; Sustainable Environment and Energy Systems (2016-8)
In this study, multi-walled carbon nanotubes (MWNTs) and multi walled carbon nanotube reinforced epoxy composites (CNTRPs) are investigated by means of computational modelling. To begin with, individual tubes of MWNTs are modelled with varying chiralities through equivalent continuum modelling in order to examine their essential mechanical properties including Young’s modulus, shear modulus, and Poisson’s ratio. The finite element models developed incorporate beam elements that represent Carbon-Carbon ...
Experimental determination of tool wear in routing and trimming of CFRP composites
Peker, Zühal; Akkök, Metin; Kılıç, S. Engin; Department of Mechanical Engineering (2015)
In order to fulfill growing demand for lighter aircraft, Carbon fiber reinforced polymers (CFRP) have been developed, which differ from metals with regards to their machinability characteristics. The main problem in machining process is the damage caused by delamination of CFRP materials which need to be both cut and shorn of fibers at the same time, since they are remarkably abrasive in nature. This research aims at accessing the most appropriate cutting condition with less tool wear in routing and trimmin...
Citation Formats
A. Haydar, “Meso-scale finite element modelling of carbon nanotube reinforced polymer composites,” M.S. - Master of Science, Middle East Technical University, 2021.