Interface characteristics of carbon nanotube reinforced polymer composites using an advanced pull-out model

Ahmed, Khondaker Sakil; Keng, Ang Kok

doi:10.1007/s00466-013-0908-x

Cited by 4 publications

(4 citation statements)

References 32 publications

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“…(2009) [ 19 ]. Considering similar type of matrix, the result was further substantiated in terms of the force-displacement relationship trends that matches well with the result proposed by van Melick (2003) [ 8 ]. It can be seen from the Figure 10 that with the application of CNT, the force requirement for same indentation depth significantly increases compare to the pure epoxy polymer.…”

Section: Resultssupporting

confidence: 86%

“…Carbon nanotubes are considered as the key reinforcing element of high-performance nanocomposites [1,2,3,4,5,6]. Existing research suggests that the load carrying ability of composites can be improved significantly by the addition of carbon nanotubes or nano-ropes [4,7,8]. Chen et al (2004) observed in his study that an addition of 3.6% CNTs by volume in a matrix, the tensile stiffness of the nanocomposites can be increased by as much as 33% [4].…”

Section: Introductionmentioning

confidence: 99%

“…A good number of research studies recommended that the strength and stiffness of CNT reinforced nanocomposites largely depends on the CNT/matrix interface and chemical bonding or non-bonding at the interface play a major role on the mechanical properties of nanocomposites [7,8,17,40,41,42,43,44,45,46]. Msekh et.…”

Section: Introductionmentioning

confidence: 99%

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Advanced nanoindentation simulations for carbon nanotube reinforced nanocomposites

Ahmed¹,

Ibrahim²,

Keng

2020

Heliyon

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Mechanical properties of Carbon Nanotube (CNT) reinforced composites are obtained utilizing finite element (FE) method-based indentation simulations considering large strain elasto-plastic behavior of elements. This study includes nanoindentation simulations for chemically non-bonded CNT/matrix interface, including the length scale effect of nanocomposites. In order to investigate the mechanical properties of CNT reinforced nanocomposites, a number of FE models for nanoindentation tests have been simulated. Sample nanocomposites are examined to determine the suitable types of CNTs and their effectiveness as a reinforcement of different potential matrices. The Parametric study is conducted to obtain the influence of wall thickness, relative positioning, and volume fraction of CNT and strain hardening parameter of matrix on the mechanical properties of nanocomposites. The obtained results indicate that, properties such as modulus of elasticity and hardness of the nanocomposites are largely dependent on wall thickness of CNT and strain hardening parameter of the matrix. This study also suggests, the minimum wall thickness of CNT to avoid local buckling in nanocomposite which is required to be at least 0.2 nm for a diameter to thickness ratio of 5.0. Moreover, a matrix having a value of strain hardening parameter near 0.1 is expected to be significantly effective for nanocomposite.

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Section: Resultssupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

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Advanced nanoindentation simulations for carbon nanotube reinforced nanocomposites

Ahmed¹,

Ibrahim²,

Keng

2020

Heliyon

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“…Classical shear-lag model is widely used to obtain interface characteristics for fibre reinforced composite since 1950s. Recently, some researchers have extended the application of the shear-lag model for nanotube as well as nanorope (several CNT as bundle) reinforced composite using representative volume element (RVE) concept [14] [17]- [21]. Though there are some studies based on the interface fracture toughness to investigate interface cracking for fiber reinforced composite using shear-lag model, most of them consider the case of interface cracking of perfectly bonded interface to be debonded interface.…”

Section: Introductionmentioning

confidence: 99%

Static Crack Propagation of Carbon Nanotube through Non-Bonded Interface of Nanocomposites

Ahmed¹,

Keng²

2014

WJNSE

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This study presents an analytical shear-lag model to illustrate the interface crack propagation of carbon nanotube (CNT) reinforced polymer-matrix composites (PMCs) using representative volume element (RVE). In the model, a 3D cylindrical RVE is picked to present the nanocomposite in which CNT/polymer chemically non-bonded interface is taken into consideration. In the nonbonded interface, the stress transfer of CNT is generally considered to be controlled by the combined contribution of mechanical interlocking, thermal residual stress, Poisson's contraction and van der Waals (vdW) interaction. Since CNT/matrix interface becomes debonded due to crack propagation, vdW interaction which is a function of relative radial displacement of the CNT/matrix interface makes the modeling of the interface tricky and challenging. In order to solve this complexity, an iterative approach is proposed to calculate the vdW interaction for debonded CNT/ matrix interface accurately. The analytical results aim to obtain the characteristics load displacement relationship in static crack propagation for CNT reinforced PMCs.

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Theoretical analysis on the pullout behavior of carbon nanotube at cryogenic environment with the consideration of thermal residual stress

Lam

Lau

Hui

et al. 2017

Composites Part B: Engineering

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Interface characteristics of carbon nanotube reinforced polymer composites using an advanced pull-out model

Cited by 4 publications

References 32 publications

Advanced nanoindentation simulations for carbon nanotube reinforced nanocomposites

Advanced nanoindentation simulations for carbon nanotube reinforced nanocomposites

Static Crack Propagation of Carbon Nanotube through Non-Bonded Interface of Nanocomposites

Theoretical analysis on the pullout behavior of carbon nanotube at cryogenic environment with the consideration of thermal residual stress

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