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ADT's picture

WEBINAR - Introducing 3Dlab and New Features for Multi-Disciplinary Optimization in TURBOdesign Suite 6 | 30th September

TURBOdesign Suite is a unique aerodynamic and hydrodynamic 3D design software package that allows users to design, analyze and optimize all types of turbomachinery, such as axial, mixed-flow, or centrifugal pumps, compressors, fans, turbines and torque converters.

Dincoz's picture

Could you tell me know which criteria if satisfied, the abaqus give this error "one of your elements distorted excessively"?

For test reasons of abaqus work, I have defined my material properties (stress-strain behaviour) up to strains of 15! However, even in this condition some of my elements reaches this strain value and distorted. I want to know which calculation the abaqus software is using to report a distortion error? 

Actually can we define our material behaviour in a way that, it would not distorted at all?




Some Linux Commands


This isn't majorly a Mechanics post but I've noticed that a lot of people have started using HPC's (which use Linux OS almost all the time), and Linux OS based desktops. It's slightly difficult for people to begin using linux but once you do there's no turning back. Here I aim to create a Linux Command cheat sheet that one can refer to. Or just have it printed and kept in the lab. 

Most of these were borrowed from but I've added in some more explanations and commands.


Software for composites

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Dincoz's picture

what is the reason for Large element deformation?

Hi my Friends,

I am doing abaqus run for a copper specimen under hydrostatic pressure. The magnetude of pressure is in order of several Giga Pascals. In my material definition, I have defined stress-strain flow up to strain of 0.4. But as you can see in attached photo, some elements show very large deformation (considerably larger than 0.4). Knowing that I have not defined stress strain behaviour for srain greater than 0.4, how this can be occure? Unfortunately, niether adaptive meshing nor element deletation were not eliminate this issue!!


Best Thanks

Frank Richter's picture

Subroutine DFLUX in ABAQUS

Dear Mechanicians,

time and again the question of modeling moving heat sources pops up, often in the context of laser heating.

One can achieve this using the subroutine DFLUX in ABAQUS.

I decided to post some links here to avoid responding with a longer explanation to every individual seeking assistance.

Please note that I have never worked with any one of these codes and have no access to ABAQUS at present.

No warranty is given by me.

Frank Richter's picture

ABAQUS built-in SMA model

Dear Mechanicians,

time and again the question of SMA (shape memory alloy) modeling pops up.

In ABAQUS, you can achieve this only by (V)UMAT coding or by using the little-known built-in SMA model.

In the past I have frequently responded to queries on SMA modeling and could refer to a customer help site of SIMULIA. That site is down, regrettably.

I decided to post the files here to avoid responding with a longer explanation to every individual seeking assistance and uploading the files as E-mail attachment every time.

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Haitao Zhang's picture

Software to simulate injection molding

Appreciate any recommendations for software which can be used to simulate injection molding process in order to identify weakpoints in the molded parts.

dithoap's picture

Characteristic length in ductile damage model in ABAQUS

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Hi All,


I want to model a dogbone specimen made from polycarbonate.

I model it using linear elastic plasticity coupled with ductile damage model.

For the damage, we are going to use the tabular form to described the damage evolution d with respect to equivalent plastic strain epsilon_p.

In abaqus, it is written that we need to input the d with respect of equivalent plastic displacement (u_p) instead of epsilon_p via equation u_p = epsilon_p \times L; where L is the characteristic length.


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Send us your image data and a quick description, and we will pick the best entry. A video will be produced that can be used to communicate your complex 3D models in presentations, or to simply show off your scans to colleagues.

Perform a modal based shock analysis in Abaqus

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Hi guys,

I'm a new Abaqus user and I do not know how to perform shock analysis after frequency analysis in Abaqus. Can anyone help me with introducing the procedure or giving an example?

Thank you in advance. :)

Dincoz's picture

Master/Slave surfaces in abaqus, what is the concept?

Could some one kindly explain me what is the advantages of using master/slave surfaces in contact problems? Indeed, when we should use master/slave strategy? Best

Parametric study- PSF file - XY plot

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Dear all,

Dincoz's picture

Element delatation for Severe Plastic Deformation (SPD) process

Dear all,

I am using Abaqus/explicite. My material definition is elasto plastic with stress strain values up to strain of 15!. After borthering tries now I think if I can set "Shear Failure Criteria Element Deletation option", it is possible to avoid this error. But I cannot find this option. Could someone guide me what exactly should I do in order to add distorted element deletation option and how? (an step-by-step tutorial will be approciate)

More Explanation about process:

How to model the boat sailing on the water surface with springs/ connectors?

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Hi, every body,

How can we define "Bending Stiffness" in ABAQUS software

Hi guys,

I'm trying to simulate trsmition lines with and without dampers.

Who knows how can I define "Bending Stiffness" for a cable or beam?

thanks in advance 

bug on deactivate the crack propagation capability?

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Could anyone please help on how to deactivate the crack propagation capability?


Following section 10.7.1 in the User Guide of 6.13, the crack propagation capability can be deactivated in some step. But I tried it in a very simple example through CAE and input file, it does not work.


Particularly, the problems are 


How to deform an existing mesh from CT measurements?

Hi all,

I would like to know if someone has a trick to deform a mesh generated in Abaqus thanks to Computer Tomography measurements ? 

The file I received from CT is a .stl.

Do you know an open source software that can compute deviations between point clouds?

Thanks in advance for your support :-D

Wenbin Yu's picture

Share/run engineering simulation codes in the cloud

I know the mechanics community have many codes to share. If you have developed engineering software including legacy Windows codes or linux codes, you can easily publish your code in the cloud and have it run on any devices including smart phones through The codes could be simple codes you wrote for your dissertation or comprehensive commerical package like ABAQUS or ANSYS. You don't have to change your code, no source codes are needed. All you need to do is to upload your executable through a very straight forward way which only takes a few minutes.

abaqus restart problem

Hi all,

    I've been facing a very strange problem now when I'm using abaqus to finish RVE multiscaling simulation: so far, what I've done is successfully  linking fortran and abaqus to run the whole calculation. At first, I met a small problem--- overwrite the old files(y/n)?---which has been solved by adding a "abaqus_v6.env" file whose content is as follows in the abaqus working direction:



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