software

I am implementing a constitutive relation in UMAT subroutine using the commercial software Abaqus. First, I tested the UMAT subroutine with 'one element model' first. Then I tested with comparatively bigger geometry. It worked fine. Now when I am trying to do a models involving contact, i.e. use of the 'Interaction module'. I am getting error of over-constraint warning for 'Split Tension test of concrete cylinder'. The same input file (except the material definition) is running on Abaqus perfectly with Mohr-Coulomb criteria. I can see a reasonable stress and strain contour.

The new version of the code presents an improved and more intuitive
management of the subroutine and an easier use of Job monitor dialogue.
Enjoy it
http://www.nosaitaca.it/software/

The improved version of NOSA-ITACA is now available at www.nosaitaca.it/software/. A more friendly monitor analysis has been implemented. Bugs related to card creation are now fixed. At www.nosaitaca.it/software/ you can find also some tutorials that will guide you through the use of the code. Enjoy !

Dear all,

I am working on the subject of the instability problem using Abaqus. 

One of the representative examples may be the squeal noise. 

In the Abaqus simulation, we have the difficulty in obtaining the left eigenvectors. 

It seems that the following comments do not work properly to obtain the left eigenvectors. 

Does anyone know how to obtain the left eigenvectors in SIM?

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*STEP

The last tutorial (Tutorial4) about a non linear static analysis of a masonry church performed by the NOSA-ITACA code, is now available at http://www.nosaitaca.it/software/. We perform the analysis supposing the structure made of two masonry-like materials with zero tensile strength and bounded compressive strength and a linear elastic material.

Running NOSA on Ubuntu 18.04 is not (yet) officially supported, but you may use the package for Ubuntu 16.04, as indicated at

http://www.nosaitaca.it/software/

See also the prevoius post about it ! Enjoy !

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