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Need help about nanocomposite materials

I am Ramin Aghababaei , new PhD student at Mechanical Department of National University of Singapore. My thesis is about finite element modelling of nanocomposites.  Because I am at the first way of my research, I want to know more about my research topic  and know exactly why I want to do  or what is the problem and how can I solve it?   So I have some questions and your experience is invaluable for me in this way. 1-what are the important parameters in the modelling of nanostructures which must be considered? 2-what is the main problem of current finite element method to model the nanostructure, especially nanocomposite materials(for example in traditional methods or in ABAQUS program)? 3-Can we expand traditional methods like as Rayleigh-Ritz or Least square methods to model and analysis of nanocomposites?   Thank you very much . Regards, Ramin

 

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Ying Li's picture

Dear Ramin,

In my view, the interface between the matrix and the additions maybe the important problem.  However, the ditrsbution and the orientation of additions are also very imprtant For nanocompostites, I suggest you see the review article"Nanocomposites in context" , which is very impressive.

Lee

L. Roy Xu's picture

Dear Ramin,

 This review paper is very good but it’s still incomplete (especially mechanics analysis) and not able to report new process from 2005-2007.  I’d answer your questions and provide my suggestions based on my previous experience on nanocomposite research. 

 Q1-what are the important parameters in the modelling of nanostructures which must be considered?  A1---- I think the aspect ratio of the nanofiller, stiffness ratio of the nanofiller and matrix should be important parameters.  

  Q2-what is the main problem of current finite element method to model the nanostructure, especially nanocomposite materials (for example in traditional methods or in ABAQUS program)?  A2-----failure modeling should be a major problem. Most of the stiffness problems including the curved nanotubes etc. have been modeled well by previous researchers. Similar to your method, we simulated a simple interfacial stress transferring problem and here is our paper published in Journal of Nanoscience and Nanotechnology(PDF file). 

Q3-Can we expand traditional methods like as Rayleigh-Ritz or Least square methods to model and analysis of nanocomposites? A3--- it’ may be very hard since other researchers have solved these easy cases.  You may use these classical approaches to solve stiffness related problems.  

For new issues of strengths and fracture toughnesses of nanocomposites, you may read my previous article.

Dear Dr. Xu

Thank you very much for your comment and your papers .they are helpful for me.

Best regards,

Ramin

Respected Sir

 

My name is Nikhil S. I am a final year Engg student from T K M College, Kerala, India. I am working on a project about the FEM analysis of Nanocomposites. Sir, I would like to have your advice in this direction.

Steps I have done so far..

 1)     Wrote a C++ programme to generate the radius,theta and z values of a carbon nanotube with input parameters tube diameter, length and element length.

2)   tried to bring it to ansys for analysis .. ( Structural Analysis)

3) Can you tell me how to model a nanocomposite from this situation in Ansys.

 

Expecting a favourable earliest reply

 

Thank you

Nikhil S

You may mail me in my email id also..

I am not follwoing recent development in 'nano'-mechanics. I suspect if ABAQUS can help, all classical solutions and analysis developed for fiber/frisk reinforced composites before can be borrowed directly. I will appreciate if someone can give a general description of the key differences in mechanics analysis between the classical fiber/frisk reinforce composites and nanocomposites IF we want to stay in continuum mechanics. Is it just a dimensional change (and some different stress transfer mechanism), or a totally new mechanics area? Thanks ...

hai, I'm doing Mtech project on "Finite Element Modeling On Polymer Nanocomposite with Clay Nanofiller", for that am using ABAQUS software can u give information how to prepare a code for distrubuting plate like particales in the polymer matrix with abaqus software. please i need that information, Thank u,

Regards

ANIL

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