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User subroutines in ABAQUS

Abaqus User defined Routines

I have been using an Abaqus dll created using a user-defined routine. Things work well on a serial case. The issue comes when I try to use it in parallel. I am trying to do this on windows 7. The error I get is

forrtl: severe (59): list-directed I/O syntax error, unit 12,

in Fortran I/O but I do not get this error when I run the simulation serially. Any ideas will be helpful.

Thanks

 

Troubles with ABAQUS subroutine compiler after update of Visual Studio 2015

I always use "Microsoft Visual Studio 11.0" and "Intel\Composer XE 2011 SP1" to apply all the user subroutines.

Recently, the university administrator updated the Visual Studio to 2105 (14.0) on my lab computer. 

When I tried to run an OLD simulation which WORKED perfectly before, it returned me the error message below:

 

Begin Linking Abaqus/Standard User Subroutines

   Creating library standardU.lib and object standardU.exp

deformation gradeint in VUMAT Abaqus Explicit subroutine

Hello everyone,

I'm modelling VUMAT for a composite. So, in my model I have inotropic and anisotropic behaviour. I have modelled isotropic behaviour but for anisotropic behaviour I need to use deformation gradient, which is causing errors. CAN ANYONE HELP with DEFORMATION GRADIENT. How to use that, do we need to rotate stress back in corotational form as abaqus manual says if yes then How?

How can we get Rotation matrix in VUMAT, if we can multiply it with stretch I think we have the result. May be an alternative.....

Please help, stuck badly :(

 

UEL visualization and strain energy for UEL

I am only seeing a "x" for a UEL at its first node. And I dont see any other node of UEL. Is it correct or some problem is there?
I also want to calculate the strain energy for whole model(including UEL). But in history output I am only seeing strain energy of Abaqus defined elements under "whole model strain energy". Can some one please help me in calculating strain energy of whole model including UELs 

Properties of Polycarbonate in Abaqus

I m doing Simulation of Impact of projectile on Polycarbonate plate , Can any one suggest what theory i used to design the Material in Abaqus CAE , 

Sample code for Abaqus subroutines

Here you can find a sample codes along with documentation:

 http://www.columbia.edu/~jk2079/Kysar_Research_Laboratory/Research.html

 At the end of the page there is the link. 

Calling a File inside of the UEL

Hi everybody,

I'm writing a User Difined Element (UEL) for my research.

Would you please let me know if it's possible to call a file (txt, dat, etc) inside of the UEL or not?

Example:

    IF (LFLAGS(3)=1) THEN
        OPEN (UNIT = 10, FILE = "AAA.dat", STATUS = "OLD")
        READ (10, *), StiffnessTable
        AMATRX=StiffnessTable
    END IF

Thanks in advance,

Ashkan

material points will change while using subroutine in ABAQUS

This subroutine using VUSDFLD is to
determine position of damage and provide evolution of damage surface, when some
elements failed. The “outer” damage status will transfer to “inner” damage
status.

Now the problem is that when I read the
coordinates of material points, using coordMp
k,1),coordMpk,1),coordMpk,1), it returns wrong locations. Then I
tried a very simple loop:

Non-uniform expansion coefficient alpha in UEXPAN (ABAQUS)

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I want to define the expansion coefficient alpha as a function of the depth, alpha(z)=f(z). How can I achieve this in UEXPAN? I cannot find a way to incorporate coordinates in UEXPAN.

Abaqus "system error code 884"

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Hello again

 

Im running a simulation on Abaqus and i got the next text message:

 

Abaqus Error: The executable C:\SIMULIA\Abaqus\6.11-PR3\exec\standard.exe 

aborted with system error code 884. 

Please check the .dat, .msg, and .sta files for error messages if the files 

exist.  If there are no error messages and you cannot resolve the problem, 

please run the command "abaqus job=support information=support" to report and 

save your system information

 

A Very silly abaqus question... applying a wind load

Dear All,

Sorry to ask such a silly question but I am quite new to Abaqus... I am trying to model a tower exposed to wind. I know how the wind pressure varies according to height, but what I dont know is how to model it in abaqus... Also, if i apply a pressure load, then the load will act normally at all points on the surface, right? But in actuality wind doesnt act that way... Could anyone help me out on this one?

 

Thanks and Regards,

Lekshmi 

About Dflux of abaqus

I would like to use Dflux to give a Temperature and dT/dt related heat flux. Can Dflux be used for this purpose? I am not sure how to get dT/dt ? Or other subroutine can fulfill this purpose?

 

Thank you 

How to export NODAL DISPLACEMENT in a UAMP subroutine in ABAQUS?

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DEAR ALL,

    I am a new user in ABAQUS. I want to do an analysis on a cantilever beam, where force applied to the beam deforms it, and depending on its deformation the direction of the force changes.

In order to calculate the change in direction of the force I need DISPLACEMENT INFORMATION at two different set of nodes where forces are being applied. I am planning to use UAMP for

How to learn user subroutines in ABAQUS by FORTRAN?

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I'm a freshman in biomechanic and apply to learn user subroutines in ABAQUS by FORTRAN.

I have installed the ABAQUS 6.11, VS2008 and IVF 11.1.

But I don't know how to call the subroutines in ABAQUS, so I will be very appreciate if someone give me some suggestion or simple tutorials about this.

THANKS!

FROTRAN subrountines for ABAQUS in bone remodeling simulation

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I'm new in the computer simulation of adaptive bone remodeling (Bone will adapt to the loads it is placed under). And I know many research cases of numerical model were implemented as FROTRAN subrountines for the software package ABAQUS: the bone material properties will be updated by the subroutine.

I know FROTRAN is excellent at handling large data sets for scientific coumputing and requires less resources, but I haven't learned the FROTRAN.I wonder what else irreplacable advantages of FROTRAN in the bone remodeling?

FROTRAN subrountines for ABAQUS in bone remodeling simulation

I'm new in the computer simulation of adaptive bone remodeling (Bone will adapt to the loads it is placed under). And I know many research cases of numerical model were implemented as FROTRAN subrountines for the software package ABAQUS: the bone material properties will be updated by the subroutine.

I know FROTRAN is excellent at handling large data sets for scientific coumputing and requires less resources, but I haven't learned the FROTRAN.I wonder what else irreplacable advantages of  FROTRAN in the bone remodeling? 

Borad M Barkachary's picture

Simple metal cutting example with chip formation in ABAQUS

Hello every one....

I am new in abaqus/cae, abaqus/explicit.  I have googled but not able to get any tutorial or example for metal cutting with chip formation. just few youtube animation videos are available on 3D orthogonal cutting, milling. But now such video or doc is available.

So, if any one having any kind of tutorial, example, or short notes.. please please share with me or mail me on my ID badwl24@yahoo.com.

it will be great help for me.  thanks in advance.... please please anyone!!!!!!!!

Subroutine simulation migration from HETVAL to UMATH

Hi!

I'm already simulating a shape memory alloy behavior with the aid of the HETVAL subroutine, but I'd like to use UMATHT instead, since the HETVAL can't simulate correctly heat absortion(cooling down).

I've tried to add the required values for UMATHT without achieving a correct phase fraction simulation, and some times even no compilation of the .for file.

Is there any other examples that uses UMATHT besides the Stefan problem?
Any other recommendation about HETVAL to UMATHT migration?

I need some guidance on writing USDFLD subroutine on Abaqus

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Hey everyone,

I'm very new on Abaqus, and what I'm trying to do is to assign to a model a changing E modulo as a linear function of Z coordinate ( E(Z)=-33936.651*Z+25e06 ).

I tried to gather some knowledge over the web on how to do so, and I found out that It can be done by writing a USDFLD subroutine, I managed to pick of some exapmles the following code:

   SUBROUTINE USDFLD(FIELD,STATEV,PNEWDT,DIRECT,T,CELENT,

  1 TIME,DTIME,CMNAME,ORNAME,NFIELD,NSTATV,NOEL,NPT,LAYER,

Problem with Abaqus and Umeshmotion

Hi,

I am currently trying to simulate the wear of a damper within a gas turbine using Abaqus 6.9 and the user-subroutine Umeshmotion. I have managed to get the subroutine to compile correctly but Abaqus does not appear to use it as I can change the wear value within the code and it makes no difference to the results.

Has anyone had the problem where Abaqus does not appear to use a subroutine even though it compiles correctly? Any hints on how to fix this would be greatly appreciated.

 

Many Thanks

 

Joe

How to update solution-dependat variable (SVARS) during iterations

Hello everyone,

 I am implementing a uel user subroutine in ABAQUS. This uel is for modeling contact in X-FEM framework. Thus, it's a nonlinear problem and I need to store some solution dependent variables during each iteration. I know I can store SDVs in SVARS. But this vector will update at the end of each step, and not during iterations. Anybody knows about this problem?

 I really appreciate if anybody can help me with this.

    Thanks

    Ehsan 

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