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Re: [lammps-users] fracture after crack propagation(problem)
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Re: [lammps-users] fracture after crack propagation(problem)


From: sumit nagar <sn971489@...24...>
Date: Wed, 11 Oct 2017 12:49:44 +0530

Steve (Sir) ,

Please consider this  as a gentle request and please provide me a
helping hand to solve this problem.I know you have a lot of important
work but just ten minutes of your time would be sufficient to solve
this problem .A hint might be sufficient to solve this mechanical
fracture problem .This is in regards to a technical paper which i am
writing for my research work  .

I am new to lammps and as per your advice i am also reading "examples
" directory for understanding the lammps script .
Sumit ,Nagar
M.Tech (Production engg)
B.E (Production and Ind Engg)
MCSA 70-290 ,SQL (Oracle z -007)
ITIL certified ,MCAD 70-306
GATE 2006,2013


On Wed, Oct 11, 2017 at 12:40 PM, sumit nagar <sn971489@...24...> wrote:
> Steve (Sir) ,
>
> Please consider this  as a gentle request and please provide me a
> helping hand to solve this problem.I know you have a lot of important
> work but just ten minutes of your time would be sufficient to solve
> this problem .A hint might be sufficient to solve this mechanical
> fracture problem .This is in regards to a technical paper which i am
> writing for my research work  .
>
> I am new to lammps and as per your advice i am also reading "examples
> " directory for understanding the lammps script .
>
> Sumit ,Nagar
> M.Tech (Production engg)
> B.E (Production and Ind Engg)
> MCSA 70-290 ,SQL (Oracle z -007)
> ITIL certified ,MCAD 70-306
> GATE 2006,2013
>
>
>
> ---------- Forwarded message ----------
> From: sumit nagar <sn971489@...24...>
> Date: Wed, Oct 11, 2017 at 9:11 AM
> Subject: [lammps-users]fracture after crack propagation(problem)
> To: lammps-users@lists.sourceforge.net
>
>
> Sirs.
>
> I have downloaded the epoxy resin file from PDB website .The search
> string  "diglycidyl ether of bisphenol A" took me to a epoxy resin
> 3UUA which is a epoxy resin .Now i have loaded it over the graphene
> sheet which i made from VMD nanotube builder .Now i converted it to
> lammps readable format using "topo writelammpsdata filename" command
> .Then i read it using read_data command in my lammps script .The
> problem i am facing is that when i deform the box using "fix deform"
> with a engineering strain rate the whole structure stretches like a
> rubber band .It uniformly stretches the structure whereas i need the
> fracture with epoxy and graphene showing cracks .The crack propagation
> should lead to fracture .What checks an i missing ? The video of epoxy
> with graphene is attached herewith . The data file epoxy with graphene
> is also attached .The graphene along with epoxy resin in VMD looks
> like the third attachment (please open this file with MS-paint) .I am
> also using quartic bond_style in my input script(deform-able bonds )
> . Where the problem lies ?
>
> Sumit ,Nagar
> M.Tech (Production engg)
> B.E (Production and Ind Engg)
> MCSA 70-290 ,SQL (Oracle z -007)
> ITIL certified ,MCAD 70-306
> GATE 2006,2013<div id="DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><br />
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