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software of interest to mechanicians

mkury0121's picture

Abaqus Pin-on-disc Simulation problem

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 I am trying to model a sheet of Poly Vinyl Butryl (PVB), which is a viscoelastic material in ANSYS. I have all the regular properties like elastic, shear and bulk modulus, poisson ratio, denstiy and damping factor. I also have a stress- strain curve of PVB. With all this data, is it possible for me to find the various constants in the viscoelastic models using ANSYS?



Acoustic analysis in Abaqus

Dear all.

I hope you are well,

I want to know how i can analyze the acoustic and noise problems with Abaqus? can anyone recommend me some valuable tutorials or documents to start? or is there any superior software in order to work on these subjects?


hossein_r's picture

install franc3d


Hi all

 I want to install franc 3d , i read the installation guide in  the site:


You can examine the documentation at . Below, I will try to explain how to install, start and use the program in a very basic way.


How to model FRP in ANSYS or ABAQUS?

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I am new to ANSYS and ABAQUS. 

Can anyone help me on modelling FRP in ANSYS or ABAQUS?

The type of element I have to choose is a question for me. I want to model a steel beam upgraded with FRP.

Best regards

Foundation on soil - ABAQUS

Hi there,

 Recently I have modelled a 2D block of soil, at the first step of analysis the soil block subjected to a gravitational load (Gravity) and gravitational stresses generated in the soil block, at the second step, a little rectangular part of soil block removed and currently a concrete block with same size of removed soil embedded on the soil block. this concrete block to be subjected a surface loading.

Abaqus error: code 5

Hi all,
I am trying to run a VUMAT subroutine for isotropic hardeining, whenever I input the command "abaqus j=inp_name user=subroutine_name " the analysis begins, the ODB file is generated but in few secs the analysis exits with an error, and the error is..

Abaqus Error: The executable C:\ABAQUS\6.7-1\exec\explicit.exe
aborted with system error code 5.

It also says...


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How can one install pngwriter with MinGW and Code::Blocks?

Also can anyone suggest some easy visualization library/tools for C++ that can be useful for simulation.

Need user material Fortran code for viscoelastic

Where I can find the subroutine of a user material Fortran code for Viscoelastic constitutive model?

Does anyone has the subroutine for LS-DYNA ?

Can anyone help me?

stepTime VS. totalTime

Hello everyone,

 I have a problem with one user subroutine.

The fact is that, debugging the subroutine I see the totaltime different from the steptime. I am using just one step and the .inp implementation is veryfied with a different user subroutine, so totaltime and steptime should be exactly the same (but they are not...)


The value of the total time is around 1e-8 and the value of the steptime is around 1e-55.


Could anyone give me a clue?


Thanks in advance.

Question on Abaqus Mohr-Coulomb hardening definition

Hi Expert,

 I'm a newer of Abaqus. I was trying to compute a simple compression problem using Mohr-Coulomb model. I found the slope of stress-strain curve from the results is double of that defined in the input file. I don't know what's cause it or my understand of the slope is wrong.

Only one 8 node C3D8 element is involved. To simplify the question, let the friction angle be 0, it reduces to a Tresca model actually. The material is defined as:

Mu.Hesan's picture

Question about specific boundary condition in Fluent

Dear Friends

Does anybody know how can I add following boundary condition in Fluent software for outlet of an internal flow ? Is there any easy way without needing UDF or etc.

Specific boundary condition in Fluent

Modal Analysis in Ansys to get natural frequencies and compare them with theory results

Hi, I'm Pietro, a short term Italian incoming student at VT (virginia tech).

My advisor, in order to start my thesis there about skin friction coefficients in a scramjet combustion chamber, gave me a Modal analysis to do on a gage described as follow:

a cantilever beam  (1mm diameter and 3cm long cylindrical shape) with 1mm depth and 1cm diameter cylindrical flat "hat" attached upon.

Base constraints: zero displacements, zero rotation

Francois Barthelat's picture

Subset Splitting Digital Image Correlation (SSDIC)

Following our recent article on this new method, we are making our Matlab routines available. The package contains standard DIC, SSDIC, plus a few extras. More info here

Choice of the analysis for stress relaxation of PBT in real time scale

I am trying to simulate the long term behaviour of the PBT (polybutyelene terephtalate) thermoplastic.

Modeling post-tensioned concrete in ABAQUS

Hi All,

 I want to model post-tensioning tendons embedded with concrete structure. Both ends of tendons are anchored. Can anyone inform me what kind of element most suitable to model the tendons and concrete structure in ABAQUS? I tried solid part for both items, yet as the tendon diameter is very small if compared to the concrete dimension, the resulting number of mesh on the concrete structure is very large.

Kewei Li's picture

SIMULIA announces new features in Abaqus 6.10

For those of you looking for FSI simulation on Abaqus platform, recently Simulia has announced the new features in release 6.10, which introduces the capability for performing Computational Fluid Dynamics (CFD) simulation.
So it enables users to perform coupled physics simulations with
Abaqus/Standard and Abaqus/Explicit, such as fluid-structure
interaction between human tissue, a medical device, and fluid flow, more information:


msliitr's picture

Abaqus software....... Acoustic-structural interaction

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how to take interaction for acoustic -structural interaction in Abaqus software...  I am going to do frequency analysis, plz help 

How to analyze a "RepRap" design (static and vibrational)?


I'm embarking on a project to build a modified copy of a DIY 3D printer.  See to get a rough idea.  In my case, I have my own lathe and milling machine, so I can fabricate more substantial components, e.g., by machining aluminum.  I also have larger stepper motors, some 3/8" precision rod and linear bearings that I can use. 

which software for impact/destructive simulation?

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I am evaluating a couple of software packages for impact and destructive testing simulation.

What are the strength and weakness of the following packages in terms of explicit solver capability for impact/destructive?

NX Nastran non-linear (with explicit solver)

NEi Nastran explicit

ANSYS explicit solver (new in ANSYS 12)






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