Effect of waviness and orientation of carbon nanotubes on random apparent material properties and RVE size of CNT reinforced composites

Savvas, Dimitrios; Stefanou, George; Papadopoulos, Vissarion; Papadrakakis, Manolis

doi:10.1016/j.compstruct.2016.06.009

Cited by 48 publications

(15 citation statements)

References 49 publications

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“…Stress distributions in both matrix and fibers were quite different from random composites. Matrix surrounding fibers were found to carry lower stresses (6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25) in the top and bottom interfaces. On the other hand, average stress values were found to be quite high (81-106 MPa) in the side interfaces, at the maximum strain ( Figure 10[D-F]).…”

Section: Effect Of Cnf Concentration and Alignmentmentioning

confidence: 99%

The influence of fiber alignment, structure and concentration on mechanical behavior of carbon nanofiber/epoxy composites: Experimental and numerical study

2020

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The mechanical properties of epoxy-based nanocomposites largely depend on fiber alignment, structure, concentration, and loading condition. To study the influence of these factors on the nonlinear stress-strain behavior of epoxy nanocomposites, random and aligned carbon nanofiber (CNF)/epoxy composites were fabricated and tested under different strain rates. The elastic modulus and tensile strength were found to be increased as CNF concentrations increased for both random and transversely aligned nanocomposites. This behavior was accurately captured by a three-dimensional representative volume element (RVE), where the fiber orientation and waviness were modeled from the experimental observation. This RVE predicted the increase in elastic modulus and tensile strength with increase in CNF concentration and strain rate as well as when the CNF alignment changes from transverse to longitudinal.

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Section: Effect Of Cnf Concentration and Alignmentmentioning

confidence: 99%

The influence of fiber alignment, structure and concentration on mechanical behavior of carbon nanofiber/epoxy composites: Experimental and numerical study

2020

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“…The typical values of stiffness moduli for carbon nanotube and epoxy resin have been used and are listed in Table 2. In the literature, the effect of carbon nanotubes alignment and waviness on the effective properties of nanocomposite is also discussed, see, e.g., the work by Savvas et al [34].…”

Section: Form Of the Representative Volume Elementmentioning

confidence: 99%

“…Aboudi [18] has presented a unified micromechanical theory using interacting periodic cells to predict the overall behavior of composites. The homogenization is also applied in the characterization of nanocomposites [19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34].…”

Section: Introductionmentioning

confidence: 99%

Design of Reinforcement in Nano- and Microcomposites

Chwał

Muc

2019

Materials

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The application of numerical homogenization and optimization in the design of micro- and nanocomposite reinforcement is presented. The influence of boundary conditions, form of a representative volume element, shape and distribution of reinforcement are distinguished as having the crucial influence on a design of the reinforcement. The paper also shows that, in the optimization problems, the distributions of any design variables can be expressed by n-dimensional curves. It applies not only to the tasks of optimizing the shape of the edge of the structure or its mid-surface but also dimensional optimization or topology/material optimization. It is shown that the design of reinforcement may be conducted in different ways and 2D approaches may be expanding to 3D cases.

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“…For the small size of NEMS, not only the nonlocal effect must be considered but also the strongly nonlinearity and random factors cannot be ignored. Recently, several researches have been reported on random response of carbon nanotubes [ 37 , 38 , 39 , 40 , 41 , 42 ]. The current paper aims to provide a kind of method to study the strongly nonlinear dynamical characteristics of CNTs subjected to random magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Stochastic Resonance and Safe Basin of Single-Walled Carbon Nanotubes with Strongly Nonlinear Stiffness under Random Magnetic Field

Lim

et al. 2018

Nanomaterials

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In this paper, a kind of single-walled carbon nanotube nonlinear model is developed and the strongly nonlinear dynamic characteristics of such carbon nanotubes subjected to random magnetic field are studied. The nonlocal effect of the microstructure is considered based on Eringen’s differential constitutive model. The natural frequency of the strongly nonlinear dynamic system is obtained by the energy function method, the drift coefficient and the diffusion coefficient are verified. The stationary probability density function of the system dynamic response is given and the fractal boundary of the safe basin is provided. Theoretical analysis and numerical simulation show that stochastic resonance occurs when varying the random magnetic field intensity. The boundary of safe basin has fractal characteristics and the area of safe basin decreases when the intensity of the magnetic field permeability increases.

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Effect of waviness and orientation of carbon nanotubes on random apparent material properties and RVE size of CNT reinforced composites

Cited by 48 publications

References 49 publications

The influence of fiber alignment, structure and concentration on mechanical behavior of carbon nanofiber/epoxy composites: Experimental and numerical study

The influence of fiber alignment, structure and concentration on mechanical behavior of carbon nanofiber/epoxy composites: Experimental and numerical study

Design of Reinforcement in Nano- and Microcomposites

Stochastic Resonance and Safe Basin of Single-Walled Carbon Nanotubes with Strongly Nonlinear Stiffness under Random Magnetic Field

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