software of interest to mechanicians
hi all
i have a problem about abaqus a want to rotate a sheet and form it with a roller it sod rotate about axial but wen i want to rotate it hade a problem about ignored BC that rotated the sheet. i define Bc for to nod in sheet center and velocity rotation to all of sheet .
plz help me to solve this problem
Hi all,
I'm using Code-Aster (FE solver) and I need to implement a UMAT subrouting to model a non-linear viscoelastic model in it.
The model is combination of viscoelasticity+ Ogden hyperleastic model. I was thinking of 2 approaches:
1. I wonder do you know where I can find such a subroutine?
2. I've seen linear viscoelastic subroutine and maybe I can find another subroutine for hyperlelastic part, I wonder how can I combine this two models to a non-linear viscoelastic model?
I really appreciate your help
BME
it's a basic problem. In LS-DYNA, with explicit or implicit method, one material model is only suitable for some element formulations/types, but not for all element types. There must be many deep reasons and some aspects to be considered.
why element formulation can not independent on material model?
could you tell me some detailed deep reasons or links about this? thanks!
As it is known, when using UMAT abaqus, stiffness proportional damping can not be used. However, for the dynamic calculation it is neccessary to put some stiffness damping. So for approximate calculations, it is easy to use numerical damping instead.
*Dynamic, application=XXX,
and using the key words *Dynamic, XXX, users can adjust the value for numerical damping. Althogh, there is no physical meaning for numerical damping, it can be a temperory solution for UMAT dynamic calculation.
Hello every one.
I need your help. I am now learning ABAQUS, doing some practice with crack propagation. The example I am doing now is a gravity dam. I sincerely want to know some material parameters with concrete damage, for example, the Normal Mode Fracture Energy, Shear Mode Fracture Energy 1st direction and 2nd direction, etc. If anyone could provide them to me ,or recommand some books that share such parameters, I would be much appreaciated.
I am waiting for your help.
Thanks.
We are excited to announce the arrival of version 1.5 of FEBio (Finite Elements for Biomechanics). This new version can be downloaded at http://mrl.sci.utah.edu/software/febio. FEBio is an open-source finite element package, specifically designed for solving problems in the field of computational biomechanics. This new version includes some major changes and contains a number of new and exciting features. Some of the noteworthy changes and additions are listed below.
I have put a history output request of displacement of a set of nodes in my model but the history output request doesnt how up in the results tree. Please help.
Thanks in advance ,
Saurabh
i am working to thermal ratchetting preaaure vesseles and pipes
and I'm doing with the software abaqus(combined hardening model)
but i have problem:
i use 2 step in abaqus
1-general-static for pressure
2-coupled-temp displacement for thermal loading
but when in submit abaqus -i get this eror
combined hardening dont use couled temp-displacement?
what is my problem?????????????
You can enrich your online articles by providing supplementary MATLAB figure files with the .FIG file extension. These files will be visualized using an interactive viewer that allows readers to explore your figures within the context of the article. The FIG files can be uploaded in our online submission system, and will also be available for downloading from your online article on SciVerse ScienceDirect.
