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.

NOSA-ITACA code 1.1c is now available

Submitted by MMSLab-CNR on Fri, 10/04/2019 - 07:18

finite element modeling

Modal Analysis

linear pertubation

model updating

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/

NOSA-ITACA code version 1.1b is now available

Submitted by MMSLab-CNR on Tue, 09/10/2019 - 06:45

finite element modeling

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 !

Abaqus left eigenvalue and eigenvector

Submitted by Gil Ho Yoon on Tue, 09/03/2019 - 10:50

software

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?

********************************************

*STEP

Ackward behavior in Abaqus

Submitted by jstello on Tue, 08/06/2019 - 00:26

Forums

Ask iMechanica

Choose a channel featured in the header of iMechanica

software

Free Tags

ABAQUS

Hello colleagues!

I am facing a very strange phenomenon in Abaqus 2019. Setting up a transient consolidation analysis, and despite converging and showing job as complete, no output is written to the job at all. Needless to say, I am requesting standard field output every n=1 steps and the analysis is 10 increments or so. It's quite frustrating to see your mesh disappear when you expect to see nice colors. If this ever happened to you please do share how you went about it.

Cheers,

A nonlinear static analysis of a masonry church by NOSA-ITACA

Submitted by MMSLab-CNR on Fri, 07/19/2019 - 09:41

software

NOSA-ITACA

masonry-like material

FEM

Finite element code

nonlinear static analysis

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.