"Geomechanics across the scales", a new themed issue for Géotechnique Letters.
Read the new themed issue for Géotechnique Letters: "Geomechanics across the scales"
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How much rock compaction is elastic ?
Dear experts,
I was just wondering to what extent rock compaction was an elastic process. My guess is that there is a limit strain above which decompaction can't occur (for example if grain crush and cement in denser type of material). But in reality how much is that compaction elastic for real rocks ?
modelling the crack in Abaqus
Hi colleage
I am working on fracture mechanics recently and i am using Abaqus to do it, i am a new user in this software so i have some problems, in getting results and ... i want to get some variable such as J-integral, S.iF, number of cycles and ... but unfortunatelly i donno how to get it .
i want to ask if anybody can send me a sample of abaqus in this srea, then i can study and practise according to it and after that i can go through my project.
UMAT non-isothermal isotropic hardening
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Hi All,
I have a problem that I need to take in to account the elastic, thermal and plastic strains (with isotropic hardening). Temperature is changing and the corresponding material properties (elastic, plastic) are temperature dependent. This can be done in Abaqus without using subroutines. As I should add some other features I need to write an UMAT.
Double diffusive natural convection of CO2
My recent simulation results http://www.youtube.com/watch?v=oyUNj7HEaro and http://www.youtube.com/watch?v=mEMrxHo_Z7s&feature=relmfu show how CO2 will dissolve in subsurface porous media after injection. The former results due to both density and geothermal gradients where the later is the results for only density difference.
-- Akand Islam
Dynamic shear localization and softening: Microstructural, thermal or both?
This basic question is discussed in a paper with S. Osovski and A. Venkert, to appear in Mechanics of Materials.
http://dx.doi.org/10.1016/j.mechmat.2012.09.008
We definitely enjoyed working on this aspect of the dynamic shear localization failure process (aka adiabatic shear) and I hope you will enjoy reading it! Comments are welcome :=)
any question any answer in Abaqus Ansys and finite element modeling
Here we are to answer any qustion of finite element modeling in abaqus and ansys.
do u have any question?
we do it for you...
Clean Energy Cheaper than Coal- Cam Follower
You can see cam follower mechanism for clean energy cheaper than coal. My cam follower mechanism is different than today’s cam follower. In general cam follower system,
Inverse of the 4th rank tensor
Hi all,
I am looking for an algorithm to get the inverse of a 4th rank tensor (e.g. the compliance tensor S_(ijkl) from elastic stiffness tensor C_(ijkl)) S_(ijkl)=C_(ijkl)^(-1)
I am programming in FORTRAN, and for this purpose I wasn't able to find neither any algorithm nor any existing subroutine.
If anyone at this forum has any idea about this inversion, kindly guide me.
Best regards,
Mubeen.
Non zero initial accelerations in a dynamic computation on Abaqus
I want to start a dynamic calculation in Abaqus in which, for every node, I specify the displacements, velocities and accelerations. I know that by the *IMPORT command, I can start a calculation with a deformed mesh, and that the velocities can be defined by in the *INITIAL CONDITIONS, but how to deal with non zero user defined accelerations? Have any body did that? Is it possible with a subroutine?
Thanks for any help