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In SPH method, does it need fracture criterion?

In abaqus ,  there is an example for SPH. It can be obtained by:

abaqus fetch job=ver_prc_projectileimpact.inp

There are two fracute criterion in this file.

But even both of them are removed, the simulation results are similar.

Why?

In SPH method, does it need fracture criterion?

 

ANSA or Hypermesh

Hi all

I am using Hypermesh for modelling a simulation model for automtorive structure.

But I dont understand which is better for my usage.

I need to make 1.Geometry cleanup 2.Mesh (2D & 3D) 3.also setup for some type of analysis (ex: strength,Crash)

Which will be beter for above operations.

 

ABAQUS Element Connectivity

Hi, 

I am trying to mesh the hollow sphere attachged using structured BRICK-8 elements. It turns out in order to have a structured mesh, I have to have 2 partitions such that four quadrants be generated.

What I only need from ABAQUS is the element connectivity. I do not need to solve any problem.

ABAQUS subroutine for compressible neo-Hookean material

Hi everyone, 

 

I am new to ABAQUS software and recently i was trying to implement compressible neo-Hookean material in ABAQUS and for me it is a very difficult task. There are already codes available for the nearly incompressible neo-Hookean material. Since ABAQUS is a widely used software,  i was wondering whether there are any database avaible consisting different codes that we can access. I am desperately looking for a subroutine for compressible neo-Hookean material. Can someone please help me or give me some direction. Thanks a lot !

 

Best,Deegayu

Tricky!!! How to read CPRESS(contact pressure) in a subroutine

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I want to set the contact pressure as a input in the routine but I don't know if there is a subroutine allows reading the contact pressure.

Thanks a lot for answering the question!!!

Tricky!!! How to read CPRESS(contact pressure) in a subroutine

I want to set the contact pressure as a input in the routine but I don't know if there is a subroutine allows reading the contact pressure.

Thanks a lot for answering the question!!!

Question about the tangential behavior of ABAQUS

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Hello everyone, I am using ABAQUS to study the tangential behavior (friction) at the interface between rock-machine. I know tangential behaivour simualtion is key for my model, I read the manual, but still have some puzzels, hoping you could help me, much appreciated in advance!

 

VUMAT general queries

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Hi,

I am beginner in abaqus and I want to write a VUMAT for VIB method to simulate fracture, while writing VUMAT i encountered following problems 

1) For 2D plane stress problem how to calculate strainInc(*,3). It is increment for that step or value of strain till that step?

2) What is effect of that defination on answer I am getting?

MSC.Marc Subroutine

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Greetings,

I wrote the following subroutine to extract nodal stress values. It perfectly writes down the nodal stresses in MSC.Marc installed for Linux; however, when I try to implement this subroutine in MSC.Marc installed for Windows using intel(R) Visual Fortran compiler, error "forrt1: severe <157>: Program Exception - access violation" occurs.

The subroutine is:

      subroutine impd(lnode,dd,td,xord,stnod,f,v,a)

      include '../common/implicit'

      include '../common/array3'

      include '../common/array2'

software comparison (abaqus, ansys, flac, udec)

hi everyone, right now I am writing my reserach proposal and met some question really need your help. thank you in advance!

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!
:)

Ansys Non Linear ANALYSIS

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When Working on Ansys Non Linear Static Structural Analysis, I couldn't comprehen while defining and assigning material properties to corrosponding bodies.

When I give different random values for density in Engineering Data and runing the jobs parallely the results look SIMILAR for all the independent values, I couldn't fish out on what basis do the software is giving out results.

Xiaofei Hu's picture

Which IDE are you using for ABAQUS coding

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IDE is the environment where we code, we have VS2008 for c++/c ... coding, and we also have "Qt creator" for qt related c++ coding. Do you have any idea on a friendly IDE for ABAQUS coding?

Simpleware Case Study: Total Hip Replacement Implant Positioning

CAD and FE models of hip implants

Positioning hip implants poses a number of challenges, particularly in terms of getting bone and implant contact right. While experimental testing can be costly, image-based modelling can be very effective at predicting the best and worst positions for implants. 

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)

problem with Numeric import in abaqus 6.11

Hi, i'm using abaqus 6.11

i am going to link matlab with abaqus using python scripting to perform an iterative analysis

the problem is that i get the error "ImportError: No module named Numeric"

please help me how to solve this problem

thanks

Wenbin Yu's picture

cdmHUB: Publish and Run Composites Simulation Tools In the Cloud

We recently launched the Composites Design and Manufacturing HUB (cdmHUB.org), a community-driven, collaborative platform that has the unique capability to let users to freely publish and run simulation codes in the cloud in addition to all the social network functionalities (blogging, questions/answers, groups, etc.).

Difficulties with User Subroutines in ABAQUS

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Hi,

 

I'm a relatively new ABAQUS user, and have been experiencing some troubles with user subroutines (specifically UMAT's).

 

At the moment, I am trying to implement a tutorial UMAT available at this site: http://www.eng.ox.ac.uk/NP/ICP/

 

I'm working with elastic.f and elas_axiforce.inp.  I've modified elas_axiforce.inp to have the lines for DEPVAR.

I'm using a linux operating system, with my .inp, .f, and .env files all in the same working directory.

 

Wenbin Yu's picture

Help compile list of available micromechanics codes

Computer simulations will be used more and more for composites design and manufacturing. Before an engineer can simulate, there are at least two questions: what are the tools available and which one works for my problem. Thus, as a start, cdmHUB plan to compile a list of micromechanics codes for the community, including commercial codes, public domain codes, or research codes. To make the list as complete as possible, we need your help.

Wenbin Yu's picture

Run GEBT online within a web browser

One can now run GEBT (Geometrically Exact Beam Theory), a general-purpose nonlinear composite beam solver, online within a web browser through cdmHUB.org. Users do not have to install the code on their own machine. And users can access to immediate support if run into any questions. You are welcome to try out the code and let me know any of your questions. 

mmalekan's picture

Run Abaqus from a Java code

Dear all:

 

Is it possible to run Abaqus from a Java code? or is there any communication way between Abaqus and Java?

I want to simulate a simple problem and pass some info from Abaqus to Java code and vice versa.

 

Thanks,

M. Malekan

 

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