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Modeling the dynamic mechanical analysis of a single pulp fiber

Submitted by Al Taib on
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DMA
dynamic mechanical analysis
single pulp fiber
loss and storage modulus

Hi there,

 

I am trying to model the DMA test for single pulp fiber. In this research I can I assume whatever procedure or materials parameters I need, from an old PhD thesis I took some materials parameters for the cellulose, hemicellulose and lignin and by using the composite theories I calculated the stiffness matrices for each constituent I have and from there I calculated the stiffness matrix of the fiber, and of course calculated the longitudinal young’s modulus of the fiber at the room temperature.

 

FEM simulation on damage of brittle materials with Abaqus on mesoscale

Submitted by yoyo Li on
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User subroutines in ABAQUS
multiscale damage evolution in composites
mesoscopic model

Hi,

I'm a fresher in abaqus. Now I'm trying to simulate the damage of brittle kind of materials, like concrete with abaqus on mesoscale. But there are some problems now...

The potential for Vanadium in molecular dynamic simulation

Submitted by Shuozhi Xu on
research
molecular dynamics
vanadium

One of the most significant factors in molecular dynamic simulatin is to choose the proper potential. Recently, I did some searching jobs on Vanadium (V) potential and finally decided which potential I am going to use. Here is a simple summary:

A brief introduction of EAM, F-S and MEAM potentials for BCC transition metals

Multiscale simulation in particular quasi-continuum or bridging domain methods and fracture

Submitted by Stephane Bordas on
job
multi-scale;ab initio;fracture;multiscale aggregating discontinuities;

We are interested in making contact with self-motivated candidates with significant experience in multiscale simulation, if possible with a Physics or Mathematics background for projects involving the simulation of multiscale fracture. Researchers with experience in ab initio models are particularly encouraged to make contact.

Please contact stephane dot bordas at gmail dot COM for more detail.

 Thank you

Stephane   

FEM simulation on damage of brittle materials with Abaqus on mesoscale

Submitted by yoyo Li on
research

Hi,

I'm a fresher in abaqus. Now I'm trying to simulate the damage of brittle kind of materials, like concrete with abaqus on mesoscale. But there are some problems now...

The random meso-structure has already been generated by matlab, but I don't know how to import the information of the geometry which are some coordinates? I find the file formats which could be read by abaqus, like Autocad .dxf,.step...but I'm not sure how to do it exactly since geometry information are in terms of coodinates in matlab.

Wanted: Fast FEA Solvers...

Submitted by Ajit R. Jadhav on
sparse solver
Shell
FEM
open source
Fast
eigenvalue
solvers
cst
direct
iterative
LST
DKT

Summary:



I am thinking of informally conducting a specific case-study concerning the FEA solvers. The reference problem is a very simple but typical problem from stress analysis, leading of course to the linear systems: Ax = b and Ax = Lx.



I seek advice as to what software libraries currently available in the public domain would be best to use---the ones that would be fastest in terms of execution time for the reference problem.



Some problems in the paper:" Haversian cortical bone model with many radial microcraks: An elastic analytic solution".

Submitted by WANGXU on
research

Dear all,

I have read the paper titled Haversian cortical bone model with many radial microcraks: An elastic analytic solution. My problems and the paper are attached.I hope you can see the problems and the corresponding paper. Thanks for your help.

Sincerely yours,

Xu Wang

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