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software of interest to mechanicians

Difficulties with User Subroutines in ABAQUS

Submitted by rwk6aw on
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Hi,

 

I'm a relatively new ABAQUS user, and have been experiencing some troubles with user subroutines (specifically UMAT's).

 

At the moment, I am trying to implement a tutorial UMAT available at this site: http://www.eng.ox.ac.uk/NP/ICP/

 

I'm working with elastic.f and elas_axiforce.inp.  I've modified elas_axiforce.inp to have the lines for DEPVAR.

I'm using a linux operating system, with my .inp, .f, and .env files all in the same working directory.

 

Simpleware Case Study: Vertebral Endplate Morphology and Permeability

Submitted by Simpleware on
software
software
biomedical
ansys
CFD

This study used Simpleware software and ANSYS Fluent to investigate the transport properties of the bony endplate (BEP). Understanding the BEP is important when considering fluid and nutrient exchanges between vertebra and intervertebral discs (IVDs. uCT and CFD were combined to evaluate the 3D microstructure and resistance to fluid flow of the BEP, resulting in a calculation of tissue permeability. The results demonstrated the value of image-based modelling and CFD for analysis of complex processes within the human body.

Methodology

Help compile list of available micromechanics codes

Submitted by Wenbin Yu on
software
micromechanics
codes

Computer simulations will be used more and more for composites design and manufacturing. Before an engineer can simulate, there are at least two questions: what are the tools available and which one works for my problem. Thus, as a start, cdmHUB plan to compile a list of micromechanics codes for the community, including commercial codes, public domain codes, or research codes. To make the list as complete as possible, we need your help.

Run GEBT online within a web browser

Submitted by Wenbin Yu on
software
composite beam
nonlinear
cdmHUB

One can now run GEBT (Geometrically Exact Beam Theory), a general-purpose nonlinear composite beam solver, online within a web browser through cdmHUB.org. Users do not have to install the code on their own machine. And users can access to immediate support if run into any questions. You are welcome to try out the code and let me know any of your questions. 

Case Study Effect of Pore Size on Pellet-Based Catalyst Flow

Submitted by Simpleware on
software
software
fib-sem
catalysts
imperial
mesh software

We have a new case study on our website based on research at Imperial College into multiscale tomography and calculating permeability for catalysts. The project involved studying the influence of pore structure on fluid flow across large length scales in silica-alumina pellet-based catalysts.

3D data at different length scales was obtained from XMT, DBFIB-SEM and ET scanning and segmented into a binarised dataset.

Composite Layup in ABAQUS: Field output at integration points

Submitted by s_gupta on
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Free Tags
Composite layup
ABAQUS 6.9

Hi all,

I am trying to understand how Composite Layup works in ABAQUS. I have specified 5 integration points for each ply in the Composite Layup definition but I am getting the field output only at 2 integration points in every ply (the top and the bottom-most points). I do not understand this anamoly. Is there some additional definition that we need to give while defining the Layup so as to be able to see the field output (atleast stress) at all the integration points. 

 

Any help would be appreciated. Thanks in advance :)

Portuguese version of cadec-online available

Submitted by Echeban on
software
Composites
composite materials

The Protuguese version of http://cadec-online.com/ is available. Previous versions include English, Spanish, and Farsi. English is the base version for the developement of the app. I did the Spanish translation. Farsi and Portuguese were done by volunters. We are looking for volunteers for other translations. pls contact me if interested.  

Simpleware Case Study: Fuel Cell Microstructure from FIB Data

Submitted by Simpleware on
software
simpleware
materials
fuel cells
stress analysis

In this case study, based on work carried out at Imperial College and University College London, research was carried out into the performance of solid oxide fuel cells (SOFCs). The microstructure of an SOFC electrode was obtained using FIB tomography, and a volume mesh generated in Simpleware software, with the model then exported to Abaqus CAE. Boundary conditions were set in the solver and stress analysis conducted, which were able to approxiamte peak maximum principal stresses in response to thermal expansion.

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