iMechanica - Sharing ABAQUS UMAT and VUMAT subroutines - Comments

Hi kawaminaii !

Jianping Lin — Sat, 31 Dec 2011 09:59:25 -0500

I have met this problem before.Maybe there is some error in your Fortran file,you can check it out especially for the program grammar.

Good luck!

an error in abaqus

kawaminaii — Sat, 31 Dec 2011 09:06:29 -0500

I have compiled a fortran code and used it as a subroutine but I have resieved this errore:

Error in job Base_subro: Problem during linking - Abaqus/Standard User Subroutines. This error may be due to a mismatch in the Abaqus user subroutine arguments. These arguments sometimes change from release to release, so user subroutines used with a previous release of Abaqus may need to be adjusted.

Wht should I do with it?

Thanks

Over time I have written

DukeKim — Tue, 13 Sep 2011 04:48:16 -0400

Over time I have written UMAT and UEL routines for progressive failure analysis, higher-order plate finite elements, specialized adhesive elements, and a score of decohesion finite element incorporating various coupled cohesive zone models to joint 1-D beam, and 2-D and 3-D continuum elements. kidney stones

Request

pal2010 — Tue, 12 Jul 2011 04:24:45 -0400

Hi friends,

I need umat subrotine(Lemaitre damage model)

please send for me if u have it.Thank u.

My email: epeyman_hf@yahoo.com

please help me

imanj — Wed, 04 May 2011 23:08:10 -0400

Hi dear friends
After much effort and time and confusion with VS, Intel Fortran Compiler and Abaqus (installaion,version,paths,...), I finally could run an analysis with UMAT subroutine successfully. This run and also some others were all extracted from Abaqus Documentation.
Now i wanna implement an analysis by my own. So i read the documentation and wrote a UMAT file by making my own changes in documentation file. From algorithm point of view, the file is correct. But i wanna know how i could link the Fortran file and Abaqus file. I mean how Abaqus realizes the Fortran file is the compatible subroutine for the model? Logically, a subroutine file shouldn't be compatible with another abaqus file. (I don't know if i could explain my problem !)

By the way, i've figured out that one of the links is about Property module. I should define a USER MATERIAL in "Edit material", and i also should define variables in there compatible with PROPS ( I'm mixed up right now!!!).

PLEASE guide me.

Modeling thermal debinding behaviour on Abasus or Comsol

belman — Mon, 28 Mar 2011 18:11:32 -0400

Hi freinds,

I 'm preparing PHD Tthesis in mechanics feild, i arrived to modelise densification of powders on Abaqus, but i can't modelise the thermal debinding behaviour (loss of polymer weight vs temperature). Anyone have an idea about this.

I have comsol and Abauqs

Thanks for your answers !

belman@hotmail.fr

Bel

Badri Veluri Hi

badrinath — Sun, 08 Aug 2010 03:42:15 -0400

Badri Veluri

Hi Erik,

Can you please share your knowledge as I am working on building the UEL for a cohesive zone model under fatigue loading. So that if I refer your knowledge base it would help me in getting some good point.

E-mail: badrinath.veluri@hotmail.com

Thanks in advance

Regards

Badri

how do i model stress wave propagation in a shpb

Emeka — Thu, 05 Aug 2010 08:39:48 -0400

I am an MSc student and my dissertation topic requires me to model a split hopkinson pressure bar.I am modelling a SHPB assembly together with the specimen, and I am having trouble with placing the loads,creating the boundary constrain between the incident, transmitter bar and the specimen. I created the interaction between the assembly with a suppressed TIE, and after loading and submitting the job I kept on getting errors. The load did not transmit to up to a quarter of the incident bar.
I neeed suggestions on how to apply the attachment between the separate components that make up the assembly, how to time step properly and the loading sequence.
I made use of ABAQUS Explicit

Rename compiler?

Nachiket Gokhale — Sat, 31 Jul 2010 13:27:00 -0400

A hack might be to rename your F90 compiler to your F77 compiler.

-Nachiket

Hi Graham, Thanks for ur

Gurudutt Chandrashekar — Sat, 31 Jul 2010 09:41:20 -0400

Hi Graham,

Thanks for ur suggestion. I have made all my subroutines in F90 . I got a doubt when i read in one of the abaqus documents on "Writing User Subrotines in Abaqus" that we have to specifically use F77 conventions. I should now figure out a way of configuring my Abaqus to use my F90 subroutines.

Have you tried yet?

Mike Graham — Fri, 30 Jul 2010 18:51:57 -0400

I have never done this, but I don't think there should be a problem in general. Make sure you've configured Abaqus to use a Fortran 90-aware compiler and if you're lucky it will Just Work.

I have used Abaqus user subroutines written in C++. In that case I just provide Abaqus the object file instead of the source code and it links it without caring what generated it. When you provide user=something, Abaqus automatically checks to see if it's source code or precompiled.

Writing subroutines in Fortran90 or higher versions

Gurudutt Chandrashekar — Fri, 30 Jul 2010 16:25:43 -0400

Hello everyone,

I am a student of Msc in Computational Engineering at Ruhr University Bochum in Germany. I am implementing a new piezoelectric element as a part of my Master Thesis. I am supposed to write a UEL subroutine and implement it in abaqus.I would like to know whether anyone has written subroutines in Fortran 90 or further versions and implemented them in abaqus. All the Help documents in Abaqus have subroutines written in F77. If it possible in F90, then it will be very helpful if someone could point out the necessary modifications that one has to make to the F90 file to run it in Abaqus. I think many ppl have this question .I myself have been trying to figure out an answer from past 1 month but could not find a convincing solution anywhere.

it seems that the input file

Thanasis Zisis — Wed, 28 Jul 2010 11:07:32 -0400

it seems that the input file (test.inp) is not in the same path with that that you are running ABAQUS in.

Problem with updating stress in Vumat while temperature higher

YangTan — Thu, 22 Jul 2010 22:16:49 -0400

hello,all!

In my simulation with vumat, the temperature will be higher than its melting temperature on several integral points, how sholud i update the stress and strain in that situation? Give them zero value? I think pressure shold be exist, but how to calculate it?

anyone can help me with this problem?

thanks

hello i am new in abaqus

lamjuv — Thu, 22 Jul 2010 12:19:47 -0400

hello

i am new in abaqus umat. before i worked in windows xp but i have a windows 7 and os 64 bit

i installed abaqus 6.10, intel visual fortran 11.1.60 and vs2010 but i can not configure them, can anyone help and give the [procedure to configure abaqus in fortran

thank`s a lot

Sharing ABAQUS UMAT and VUMAT subroutines

azadpoor — Thu, 29 Nov 2007 08:23:45 -0500

I have noticed that a lot of people are using UMAT and VUMAT material model
subroutines for their researches. However, most of these subroutines do not
find their way to free code market and remain in the hands of the developers.
Therefore, a lot of wheel re-inventing has to be done by other people. Since
development and testing of a material subroutine takes a damn long time, I
think it is a good idea if each of us can share the subroutines she has
developed with the others. I know that a couple of subroutines are publicly
available and many other people also know that. Please comment about less-known
freely available subroutines.

To be more specific, I think it would be useful if people can comment about
following highly demanded UMAT subroutines:

1.Cohesive zone elements models

2.Polycrystalline plasticity

3.Gurson-type ductile fracture models

Note added by admin: This topic has also been discussed in another thread: http://www.imechanica.org/node/2375