http://www.sciencedirect.com/science/article/pii/S0266353813001012?np=y
Abstract

3-D
reconstruction of Halloysite nanotube (HNT) polypropylene composite has
been performed using two different methods. In the first method,
several slices of the composite material were obtained using focused ion
beam (FIB), and scanning electron microscopy (SEM). A representative
volume element (RVE) of the real material’s micro/nanostructures was
then constructed by stacking these morphological images using VCAT®
software. In the second method, SEM images of the nano-composite were
used to extract statistical two-point correlation function (TPCF), for
reconstruction of an RVE of the nano-composite.

The
resulting RVEs obtained from both methods were meshed for finite element
(FE) simulation of deformation under tension and shear loadings. The FE
results were then used to compute the stiffness tensor of the
nano-composite.

In the statistical approach, the TPCF
was obtained from a none-Eigen microstructure which can partially
reflect statistical information of the microstructure. The mechanical
constants obtained from statistical RVEs using FEM approach shows a 5.7%
error compared with those obtained from real RVE, which could be
attributed to the approximation using TPCF. [1]

It
is concluded that the statistical method using TPCF alone can produce
an approximate microstructure that should be modified using other
statistical descriptor such as two-point cluster function and lineal
path function to have better reconstruction of heterogeneous
nano-composites [2].

Dear All,

I am looking for some paper on material models for polymer nanocomposite
in high strain rate. I will be grateful if someone introduce me some good
paper.

Regards

Azadeh

Hi There,

I am going to measure the mechanical properties of nanoparticle in Nano composite using nanoindenter. I searched through the literature and I did not find any work that measure this individually and all of them measured properties of nanocomposite not the inclusion itself. ThanksAzadeh

Dear All,

I want to simulate polymer system that have pi-pi interaction between

chains and reinforcements. I know there is no implemention of pi-pi

interaction in lammps.

So, Is there another method to consider pi-pi interaction in lammps? or

I can't simulate these system by lammps.

Regards,

Azadeh

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Mechanical performances of composites are highly dependent
on the manufacturing process in which they have been produced. For example we
can achieve higher strength and modulus by using compression molding since we
can use longer fiber while in injection molding
we do have a fiber length limitation that cases lower mechanical properties
with the same mass fraction in compression molded composite.

There are lots of paper in which this issue has been discussed
but all of them are for micro scale fiber like galss and Kevlar and …, does
anybody have idea what is the situation for nano-composite?,

Dear All,

Recently I have read some literatures on Molecular simulation of polymer. My interest is measurement of

mechanical properties of polymer through the uniaxial tensile test.

I have a question about relatively large time scales in MD simulations of polymer and how to interpret MD

stress-strain results for FE modeling. In particular, in the literature it is mentioned that strain rate of

109 1/s is very large compared to Experimentally observed values. I would greatly appreciate if someone

guide me on how one can convert the MD values for strain rate for FE simulations or point out references

in the literature where these issues are discussed in more detail.

Thanks

AZadeh

HI There,

I am going to generate a polymer chain and I am looking for a hexagonal self avoiding walk (SAW) code (computer program), most 3D free code (C nad fortran) are for qubic latice.

Thanks

AZadeh

Hi There,

I am going to do MD simulation on polymer nanocomposites in order to measure the mechanical properties and density of the interphase between fiber and matrix. my filler is platetlet. I read some paper in which similiar work has been done some of them with LAMMPS and some using Material studio

I am wondering what is the pros and cons of each.

Thanks

Azadeh

Hi All,

Most exisiting failure critera delevolped for fiber composite laminates and they are rough estimations for fabric composite. I want to know if there is a suitable failure criterion for fabric composites.

Thanks

Azadeh