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Exhaust Manifolds to Medical Devices: 11 Examples of Success with Isight at the SCC

To download any of the 11 conference papers, click here: https://swym.3ds.com/#post:13114. Note that a brief one-time registration is required, but it will provide you with access to the entire SIMULIA Learning Community.

Breast simulation: Deformation Map

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Hi,

I want to simulate the deformation of breast under gravity. I
initially have patient's breast images in one position (supine, with
breast falling on the chest). I want to apply gravity loading and
simulate breast image in another position (prone, with breast falling
away from the chest).

I follow the standard path i.e. segment images (supine data),
generate mesh, import the mesh into ABAQUS, apply material properties,
BCs and loads and run the simulation and I get deformed breast mesh
(simulated prone).

ABAQUS - Does Newton's method affect the convergence rate of higher order incremental scheme such as RK4 implemented via UMAT?

Hello everyone,

I'm currently doing an analysis on the convergence rate of an incremental model that I have implemented in ABAQUS using a UMAT. Here's the BIG lines of the problem:

1) In UMAT : Solution of a differential equation using explicit Runge-Kutta 4 (RK4), which has a 4th order convergence rate, yields the stress state "S". (In my problem, stresses are applied)

Abaqus: write surface mesh element detail

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Hi,

i need some help in writing the surface mesh in abaqus. i have a wing model, meshed using hexahedral mesh. now what i want is to write the surface element detail on a file, containing the element number and its neighbouring four nodes. for example

12, 2 3 5 6

here 12 is the element number and 2,3,5 & 6 are the corresponding nodes.

Abaqus: write surface mesh element detail

Hi,

i need some help in writing the surface mesh in abaqus. i have a wing model, meshed using hexahedral mesh. now what i want is to write the surface element detail on a file, containing the element number and its neighbouring four nodes. for example

12, 2 3 5 6

here 12 is the element number and 2,3,5 & 6 are the corresponding nodes.

How can predefined fields be mapped from old mesh to new mesh using *map solution in ABAQUS?

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Dear friends,

I used *map solution a lot and it works fine in my modelling. Recently, I
came across a problem with "predefined fields". The ABAQUS's
documentation explicitly states "temperature and field variables are
mapped from the old mesh to the new mesh". According to my experience,
temperature is fine and it can be correctly mapped. Unfortunately, the
predefined fields can not be mapped.

How to find the average temperature a surface? ABAQUS -Heat transfer -user subroutine

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I want to model a concrete slab with a void inside the concrete. It is a thermal analyse where I apply a heat flux to the bottom surface. Within the void heat is transferred by radiation and convection. For simulating heat convection within the void, I use the surface film condition function in interaction module. I have to define the film coefficient and sink temperature. I decided to use the average temperature of the void surface for sink temperature. I don’t know how to define the average surface temperature. I think I have to use Abaqus Subroutine.

Abaqus multiscale bridge with UMAT

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Hello,

I'm trying create a bridge between scales using Abaqus, UMAT subroutine.

On macro scale I call UMAT, which calls other abaqus inp. with this example code

call SYSTEM('abaqus cae script=C:\Temp\mixUMAT\simpleModel.py -- A 2 5.3')

And my "simpleModel" receives all arguments properly.

However, I need some values which are calculcated on "simpleModel", to UMAT continues the executation.

Anyone knows  how can I do it?

 

Thank you! 

abaqus noGUI problem?

hi everybody,

 I'm a fresh man in Abaqus. Recently, I find that  the command 'abaqus cae script=job.py' works very well, however, the command 'abaqus cae noGUI=job.py' doesn't work. But the the 'job.py' is exactly the same! By the way, the problem shown by abaqus is located in the output area, fieldfieldoutput and historyouput.

 Does anyone know the difference between them? 

Thank you in advance! 

Jiagui 

tank sloshng- harmonic excitation

I am working on a project relating to sloshing of rectangluar tank in 2d, given a harmonic base excitation. I am using CEL tecnique of abaqus.

Can u tell me how to apply the harmonic load to the tank base and any suggestions regarding the project? 

Shear test data evaluation fail in ABAQUS

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Dear all,

I am currently perform a curve fitting for material coefficient determination.
In my hand, i have a set of stress strain data from the shear test.
I try to import the data as planar test data in ABAQUS.
However, when i try to evaluate the material to get two term moooney rivlin coefficient out, it shows the following message.
"Material evaluation cannot be carried out with planar test data alone unless Reduced Polynomial, Arruda-Boyce or Marlow potentials only are used."

ABAQUS - XFEM

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i am using XFEM in a 2D analysis (plate under uniaxial tension) and would like to get the SIFs at different crack lengths to compare with published data for verification before i start performing crack propogation analyses.

 

My problem is, history outputs are not available for crack growth in XFEM only static cracks (at least from what i read).  

Ideally, i would love to get the SIFs as they change through the crack propagation. 

 

Anyone have any ideas on this? 

Thanks in advance.

alinojumi's picture

Postprocessing the Cohesion in the field

Hi Everybody, 
I'm using Mohr-Coulomb with Cohesion Hardening  in Abaqus and I'm wondering how can I postprocess the state of Cohesion in the field?

Tanks ahead,
-Ali
 

How to implement a kind of nonlinear interaction relevant to relative velocity in ABAQUS?

Dear all,

Could anyone help to give me some advice on how to implement a kind of nonlinear interaction relevant to relative velocity in ABAQUS? The interaction force has a quadratic function with the relative velocity between two nodes. Thanks.

UMAT and URDFIL

Hello everyone,

 I am running a UMAT on ABAQUS. However, I need to call another subroutine : URDFIL. I have included the URDFIL subroutine in the same file as the UMAT subroutine.

The problem is that when I run the program, ONLY the UMAT subroutine runs. It looks as if ABAQUS ignores completely the URDFIL subroutine (It doesn't run it at all). Do we have to include anything 

specific in the INPUT file in order for ABAQUS to take the URDFIL into account?

Thanks for the help!

- Jack

 

FINITE ELEMENT WEAR SIMULATION

hi all,

        i am very new to abaqus and i want to simualte sliding wear between a pin and a disc. i found from the literature that by using user subroutines we can calculate the wear. i am not getting how to use a user subroutine , can any one expain how to use user subroutines in the CAE. is there any simple example problems in understanding this user subroutine functions. thanks in advance. 

Hidroxid's picture

sequential Abaqus input change

Hello,

 I need to write a python script that changes the inputs in my MDB file and then runs the abaqus code and gets the output and then goes on with another sets of inputs.

Since I am quite a beginner in abaqus-python scripting, does anyone has any clue how to do this automatically, I mean not changing the inputs in every run manually.

Thanks,

Omid

On-Demand Access to View Recorded Abaqus 6.12 Presentations

Were you unable to attend the 2012 SIMULIA Community Conference (SCC)? Did you miss the Abaqus 6.12 release webinar to learn about the latest features and enhancements? If you answered "yes" to either of these questions, we have good news for you!

For your convenience, we are providing you with on-demand access to two SCC General Lectures focused on Abaqus 6.12, in addition to the standard release webinar. Click on one of the links below to bring you to the SIMULIA Learning Community, where you can perform a quick registration to view all three recordings.  

Element Non-Deletion in Abaqus Standard?

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   I am part of a group that is attempting to model the energy dissipation from a crack.  In order to do that, we need to track the energy throughout failure.  It is our understanding that the way to do this is to model the failure without element deletion, but we having little experience with ABAQUS, we cannot figure out how to turn element deletion off.  Help?

farhang_760's picture

Analyzing a 2D Truss With abaqus - Problem with forces at each element

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ABAQUS: Thermal Analysis of Composite Columns

Greetings,

I'm working on thermal analysis of concrete filled steel tube columns.

I used all the guidance I could get  from the research papers, but I still didn't get the results I want.

In fact, all the job analysis I run ended up abrupted. 

I attached my abaqus work for your kind attention and perusal. 

Any suggestions and tips that might help me overcome my problem is more than welcome. Perhaps I could get some pointers whict part in my analysis is missing.

Thank you.

My work links:

how to convert cylindrical co-ordinate system to cartesian co-ordinate system

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sir/madam,

                i have modelled a curved section with one end fully constrained and to other end applied pull load, i am getting result in cylindrical co-ordinate system can i see the results in cartesian co-ordinate system 

megaamin's picture

abaqus nod inactive

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

Truncation of Displacement boundary conditions in Abaqus

 

 

Hi everyone,

 

I've wrote a script in python to create a model in Abaqus, run the simulations and retrieve the results I need.

I use the Abaqus python build (on PDE).

 

I experience a strange problem with the following command:

 

myModel.DisplacementBC(... ..., u1=0.123456789, u2=SET; ur3=...)

 

which gets translated in the input file like this:

 

*Boundary

myNodeset, 1, 1, 0.1234

myNodeset, 2, 2

 

mesbah.unm's picture

UMAT

I have problem with linking the visual studio, fortran and ABAQUS. Is there anybody who can help me?

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