Analysis of carbon nanotube-reinforced alumina matrix nanocomposites with a broken fiber

Kirtania, Sushen; Chakraborty, Debabrata

doi:10.1177/0731684413512704

Cited by 4 publications

(4 citation statements)

References 25 publications

(65 reference statements)

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“…The composite is considered to be defect-free. The nanotubes are assumed to be perfectly bonded with the metal matrix 22,72 and it ensures that the tubes do not slip, detach or become loose from the matrix material. However, this assumption, introduced for the sake of computational simplicity, imposes the condition that the phenomenon of interfacial slip cannot be analysed and the limiting force for the same cannot be estimated.…”

Section: Finite Element Modelmentioning

confidence: 99%

“…20,21 As a result, since the beginning of the last decade, CNT-reinforced composites have been an important topic of research. 22…”

Section: Introductionmentioning

confidence: 99%

“…20,21 As a result, since the beginning of the last decade, CNT-reinforced composites have been an important topic of research. 22 A crucial first step in the design and study of components comprised of such materials is the evaluation of their mechanical properties. So, it is not a surprise that numerous studies employing various techniques to determine these features have been published over the years.…”

Section: Introductionmentioning

confidence: 99%

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Finite element based indentation contact analysis of SWCNT nano-composite

Bhadra

Jana

Mitra

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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The focus of the present study is to simulate the indentation type contact behaviour of single walled carbon nanotube (SWCNT) based nanocomposite. The contact system consists of a deformable Aluminium matrix, reinforced with a group of SWCNTs, and a conical indenter which is assumed as rigid. Downward and upward displacement is imparted on the conical indenter in order to simulate the loading and unloading phases of the contact. The model has been developed using APDL code on the ANSYS platform. Adequacy and validity of the model has been established by comparison with results from already published papers available in literature and the matching between the two sets of results is found to be excellent. In terms of results, contact forces, contact area, contact pressure and deformation behaviour are extracted from the analysis with varying wall thickness of CNTs. Detailed analysis of the obtained results has been carried out and it is found that sink in and pile up (in one particular scenario) behaviour is exhibited. It is also found that due to high deformation of the tubes at high indentation depth, there is material flow towards the axis of symmetry and creation of small elastic zones in the matrix material.

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Section: Finite Element Modelmentioning

confidence: 99%

“…20,21 As a result, since the beginning of the last decade, CNT-reinforced composites have been an important topic of research. 22…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Finite element based indentation contact analysis of SWCNT nano-composite

Bhadra

Jana

Mitra

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…A nine CNTs RVE was considered for analysis of CNT/Alumina (Al 2 O 3 ) matrix composites having a broken CNT by Kirtania and Chakraborty. 14 However, fracture behavior of the same was not studied.…”

Section: Introductionmentioning

confidence: 99%

Failure analysis of carbon nanotube/epoxy composites having a broken carbon nanotube

Kirtania

Chakraborty

2015

Journal of Reinforced Plastics and Composites

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In the present work, multi-scale finite element analysis of carbon nanotube/epoxy composites having a broken carbon nanotube has been performed to assess the severity of such a fiber (i.e. carbon nanotube) break. A square representative volume element having nine-carbon nanotubes has been considered for the analysis. Considering a small debonding around the broken fiber as a crack front, stress redistribution around the break is studied. Using the concept of linear elastic fracture mechanics, strain energy release rates around the debonding have been calculated using virtual crack closure integral method. Quadratic stress criterion has been used to assess the delamination initiation at the interface of broken carbon nanotube and the matrix. Virtual crack closure integral along with quadratic stress criterion has been used to determine the critical strain energy release rate. Results from the present analysis show that the fiber volume fraction does not have significant influence on the ineffective length of the broken carbon nanotube. A high magnitude of interfacial shear stress is observed to have developed in the vicinity of the fiber break indicating the chances of debonding. All the three components of strain energy release rate have been determined and the influences of important parameters on the value of strain energy release rate have also been studied.

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