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is there any command available to skip/suppress the element quality check, while running an analysis in abaqus?


 

H.Rahnama's picture

A UMAT Code In ABAQUS - Progressive Failure Analysis

I have written a UMAT code in ABAQUS. This UMAT degrades the young modulus of an isotropic elastic material at a point when the VonMises stress at that point reaches a specific value. It can be seen as a simple progressive failure code. I have applied this UMAT code to a Notched plate under uniform tension.

The problem is that exactly before the damage initiation, the ABAQUS/Standard diverges. I am sure that there is a very simple mistake that I just can't see!
:)

Lance C. Hibbeler's picture

ABAQUS: nice colorbar ranges

I have produced a python script that automates setting up reasonable values in the ABAQUS/CAE colorbar, basically setting up Tecplot functionality.  After executing the script from File->Run Script, you have access to a function that you can call in the built-in interpreter,

>>> SetContourRange(minval, maxval)

Gatherin results from multiple points in the parametric study

Hi everybody! 

I am doing a large parametric study of a composite shaft. I am working with 5 variables and the number of simulations and data will be quite big. 

I would like to gather results automatically on a circumferential path around the shaft. (About 60 elements) 
Is it possible to do it with a "gather" command - I think that only one node/integration point can be defined at "gather" command. 

Has anyone already done something like that and how did you solve the problem. 

Soud Choudhury's picture

Abaqus is not reporting any CEEQ in coupled temp-displacement step

Hi all,

I am modeling a simple coupled temp-displecment analysis with the following step information:

** MATERIALS

** 

*Material, name=Material-1

*Conductivity

 1e-06,

*Creep, law=HYPERB

44000., 0.005,   4.2, 45000., 8.314

*Elastic

60000., 0.34

*Expansion, zero=25.

 1.4e-05,

*Plastic

20.,  0.

60., 0.1

** 

** PHYSICAL CONSTANTS

** 

*Physical Constants, absolute zero=-273., universal gas=8.314

** STEP: Step-1

** 

How to use abaqus input files from abaqus example problems guide

I am new to abaqus and am going through this tutorial on "Damage and failure of a laminated composite plate".  I find lot of input files at the bottom of this example. I tried "importing" them by going to file->import but I find that there is no geometry or mesh associated with it. Does one create the geometry oneself? How do we use the sample ".inp" and ".f" files to learn about abaqus sample problems.

wvmars's picture

Engineering Analyst position with focus on FEA, elastomers, and fatigue life prediction

Endurica, LLC is a growing software and consulting services company headquartered in Findlay, Ohio, USA. The
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of elastomeric products, a materials characterization service, and project-oriented consulting services. Our
software is distributed globally in partnership with Dassault Systemes.

Imperfection in a Riks Analysis (ABAQUS)

I am performing a nonlinear post buckling using Riks method. I went through different tutorials for the same. I happen to see that an *IMPERFECTION is introduced while performing the non linear buckling analysis.Why is it done? How does/will the model react differently if the Imperfection is no introduced?

I wish to plot the graph of load v/s displacement for 1,2,3,4...10 times the critical buckling load during the post buckling analysis (Riks method). How do I do that?

ductility of carbon nanotube reinforced composites.

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HELLO,

I want to know if carbon nanotubes reinforced composites are ductile as I want to do hydroforming process by using ABAQUS or any other metal forming process that can be implemented.

If it is formable than what are values of yeild strength, ultimate tensile strength, plastic strain,etc.

the matrix material is polymer(PmPV).

THANK YOU.

How to model fastener with same force-displacement behavior for all translational directions in a plane in Abaqus?

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<p>Hi everyone. I want to model the fasteners connecting a wood sheathing to a steel frame in Abaqus. I want to input the same force-displacement behavior for all translational directions in the plane of the sheathing (like a radial spring). <br /> <br /> I was using spring element type Spring2 (nonlinear) but I could define behavior in only 2 translational directions in the sheathing plane (X and Z). This made my model overly stiff after the elastic range. I read about the RADIAL-THRUST connector element but it does not seem to be the one.

How to model fastener with same force-displacement behavior for all translational directions in a plane in Abaqus?

<p>Hi everyone. I want to model the fasteners connecting a wood sheathing to a steel frame in Abaqus. I want to input the same force-displacement behavior for all translational directions in the plane of the sheathing (like a radial spring). <br /> <br /> I was using spring element type Spring2 (nonlinear) but I could define behavior in only 2 translational directions in the sheathing plane (X and Z). This made my model overly stiff after the elastic range. I read about the RADIAL-THRUST connector element but it does not seem to be the one.

ABAQUS Tracer sets and Illegal Memory Reference error in restart analysis

Dear all,

I am trying to simulate a large deformation problem using the ALE method in ABAQUS Explicit. When I try to request a Tracer Particles output in a restart analysis Abaqus crashes and the log file states that the packager stopped for an Illegal Memory Reference error. Did anyone experience the same issue? I was running Abaqus 6.13 on Linux

Regards,

 

NL

Selection of element bsed on the location in abaqus using python script.

Hi
I'm facing problem while writing a script for a parametric study.
After changing the each parameter the model changes and and the loaction of the interested element changes based on those parameters.
Also the element number changes.
Is there any command in python script to choose the elements based on the location ? 

Thank you in advance

Rajesh Kumar

how to apply USDFLD to specific areas of a FE model

Hi, I'm modeling a composite box structure consisting of several fillet zones. Now I know only those fillet zones will develop progressive damage. The question is how I can apply USDFLD into only thiese zones, instead of making subroutine calculation of the whole model. I suppose there should be an argument to specify the range of elements  into subroutine calulation, anyone knows that? Thx

Nonlinear stiffness for cohesive behaviour

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Hi all,

 Does anyone know how to define nonliner (or exponential) stiffness for cohesive behaviour (for ascending branch before damage)? In CAE it's only allowed to enter one value

 Thanks

 Mo

Attila Kossa's picture

Introduction of the hyperfoam model in ABAQUS

Dear Researchers,

 

I am trying to find out which was the first ABAQUS version, wchich includes the hyperfoam material model. I haven't found any version history about this. Could someone tell me the very first version of ABAQUS in which the hyperfoam model was included?

 

Thank You!

Kind Regards,

Attila KOSSA

Modelling of Thermosyphon Evaporator in Abaqus

Is it possible to model and do the thermal analysis of a thermosiphon loop using ABAQUS.

Co-simulation Engine Mapping search failures in Abaqus

Free Tags: 

can anyone guide me what is co-simulation engine mapping search failures in abaqus?? as i get this error while trying running co-simulation between AbaqusCFD and AbaqusStandard.

i have created CAE Model with single fin (mounted on tube) and tube as a single part and created partion wall along the edge of fin, Created CFD Model with fluid, assigned structured mesh.

Even file pre-processor completes successfully but it aborts showing "co-simulation engine mapping search failures in abaqus"

Postdoctoral Position in Computational Damage Mechanics Available at Masdar Institute in Abu Dhabi

A Postdoctoral Research Fellow position in computational damage mechanics is
available immediately at Masdar Institute of Science and Technology in Abu
Dhabi in United Arab Emirates. Masdar Institute is established in collaboration
with Massachusetts Institute of Technology. The research project focuses on
using advanced computational fracture and damage mechanics for simulating the
behavior of advanced materials under different loading and environmental
conditions. The candidate is expected to have a PhD in the field of Mechanical,
Civil, or Aerospace Engineering with solid knowledge of theoretical/computational
solid mechanics; continuum damage mechanics, fracture mechanics,

"keyword *CO-SIMULATIONREGION is misplaced" Error

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i everyone,

I am UG student of Mechanical Engineering. I am a new user of Abaqus and currently working on co-simulation for my final year  project. Actually what I am doing is prediction of heat transfer due to fluid flow in a tube of known diameter across which air is flowing, also called as conjugate heat transfer.

I created model in Abaqus/standard named Tube, created part as Tube


Assigned material properties

Created step "Dynamic, temp-disp, Explicit"

Beam elements in Abaqus

Hi every body,

I'm tring to make a beam by using beam elements in Abaqus like this:

      ----------------------------------------------------------

      ----------------------------------------------------------

      ----------------------------------------------------------

How to assign orientation for fibers in woven composite ?

Hello everyone,
 
I am working on textile composites. I have to assign local material orientation for the fibers. I have come across *ORIENT  subroutine in abaqus. But I am quite new to user subroutines. Is there any other way in which I can assign local material orientation to the fibers?
The fiber layout is such  that it has linear as well as sine part. Can anyone give some idea on how to create *ORIENT for such fibers?

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