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
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About Dflux of abaqus
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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
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Abaqus "system error code 884"
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
do you know what is this error? ive been looking on ABAQUS documentation and in the web and i cant find information
Thanks for your help
Juan Carlos Martinez
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How to use USDFLD request variables from other elements in ABAQUS
Hi all,
I want to use USDFLD to have diffusion and mechanical coupling analysis. The model is building a cohesive zone between two parts. Before the calculation is executed in each increment, I need to get the stress information of last increment of one element and the other two element next to it in the same cohesive zone. After geting this, I can update the parameters of cohesive zone and a following mechanical analysis will be executed. How can I save the variables of desired elements for each increment? Or how can I request other elements' information in the USDFLD subroutine ?
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Non-uniform expansion coefficient alpha in UEXPAN (ABAQUS)
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.
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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),coordMp（k,1),coordMp（k,1), it returns wrong locations. Then I
tried a very simple loop:
Do
k=1,nblock
stateNew(k,7)=nblock
end Do
I found the number of material points
(namely, nblock) varied! First time
I ran this loop, I got the contour of state variable 7 (SDV7) shown below. The
SDV7 were various. But from the subroutine they were supposed to be same.
Then I coarsen the mesh, and get a
different result, SDV7 of every element were same (equal to the material point
number=125)! Shown below:
Then I substituted coordMp(1,1) for nblock
in the above-mentioned loop, and found similar phenomenon.
I wonder if the number of material points
and their coordinates will vary in a loop? Those results are beyond my expectation.
Is that Fortran grammar problem or misunderstanding on subroutine in Abaqus?
I attached the subroutine "position.for" and its "Job-1.inp" below. But I switch their extensions into .txt for uploading.
Thank you all.
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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
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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.
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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 ,
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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
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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 :(
Thanks in advance
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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
standardU_static.lib(SMAStsUsubs_IF.obj) : error LNK2005: DllMain already defined in MSVCRT.LIB(dllmain.obj)
standardU.dll : fatal error LNK1169: one or more multiply defined symbols found
Abaqus Error: 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.
Abaqus/Analysis exited with errors
Although Visual Studio has been updated, I still called the "Microsoft Visual Studio 11.0" and "Intel\Composer XE 2011 SP1".
Can anyone help me on this issue?
Thank you very much!
-Ninggang
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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
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some errors still exists for me during importing subroutine file in abaqus/cae
Thank you asim sir,
I am sorry to say that i am still getting the error message.I have attached the picture of procedure and error messages i gets.please correct my procedure.
I use
Normal
0
false
false
false
EN-IN
X-NONE
X-NONE
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table.MsoNormalTable
{mso-style-name:"Table Normal";
mso-tstyle-rowband-size:0;
mso-tstyle-colband-size:0;
mso-style-noshow:yes;
mso-style-priority:99;
mso-style-qformat:yes;
mso-style-parent:"";
mso-padding-alt:0cm 5.4pt 0cm 5.4pt;
mso-para-margin-top:0cm;
mso-para-margin-right:0cm;
mso-para-margin-bottom:10.0pt;
mso-para-margin-left:0cm;
line-height:115%;
mso-pagination:widow-orphan;
font-size:11.0pt;
font-family:"Calibri","sans-serif";
mso-ascii-font-family:Calibri;
mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:"Times New Roman";
mso-fareast-theme-font:minor-fareast;
mso-hansi-font-family:Calibri;
mso-hansi-theme-font:minor-latin;
mso-bidi-font-family:"Times New Roman";
mso-bidi-theme-font:minor-bidi;}
C:\SIMULIA\Documentation\docs\v6.8\books\eif\ufricxxy.f
as the inpu file
Normal
0
false
false
false
EN-IN
X-NONE
X-NONE
MicrosoftInternetExplorer4
/* Style Definitions */
table.MsoNormalTable
{mso-style-name:"Table Normal";
mso-tstyle-rowband-size:0;
mso-tstyle-colband-size:0;
mso-style-noshow:yes;
mso-style-priority:99;
mso-style-qformat:yes;
mso-style-parent:"";
mso-padding-alt:0cm 5.4pt 0cm 5.4pt;
mso-para-margin-top:0cm;
mso-para-margin-right:0cm;
mso-para-margin-bottom:10.0pt;
mso-para-margin-left:0cm;
line-height:115%;
mso-pagination:widow-orphan;
font-size:11.0pt;
font-family:"Calibri","sans-serif";
mso-ascii-font-family:Calibri;
mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:"Times New Roman";
mso-fareast-theme-font:minor-fareast;
mso-hansi-font-family:Calibri;
mso-hansi-theme-font:minor-latin;
mso-bidi-font-family:"Times New Roman";
mso-bidi-theme-font:minor-bidi;}
C:\SIMULIA\Documentation\docs\v6.8\books\eif\ufricxxy.f
as subroutine file
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UEL ABAQUS Subroutine
Hi,
I'm stucking with my subroutine. May ask anybody to have a look the the file.
I run a simple model that and try to run it,but an error message was appeared as below; ***ERROR: USER SUBROUTINE UEL MISSING
I don't know what is the problem. I did locate the input (.inp) and user (.f) in the same folder and run it (abaqus job=.... user= ...ff int )
Hope to get help from anybody...
Aida
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ABAQUS VUHARD subroutine problem
Hello
I am working on the simulation of ring rolling. I have written the subroutine for the plasticity part in the subroutine VUHARD and have set the PLASTIC part in material definition to USER.
I dont have HARDENING PROPERTIES so i have set it BLANK. i have set the path of the subroutine in the job defintion part too. But abaqus crashes whenever i try to do DATA CHECK
It says ABAQUS KERNEL EXITED WITH AN ERROR.I dont know why this problem arises?. I am stuck.
The curve i want to define is yieldstress=K*plasticstrain^m*plasticstrainrate^n
I have defined the yield,Dyieldeqps(k,1)Dyieldeps(k,2) as abaqus has told.
Abaqus has told to define Statenew too.I dont know how to define it.
This is my subroutine :
c-----subroutine for plasticity
subroutine vuhard(
C Read only -
* nblock,
* jElem, kIntPt, kLayer, kSecPt,
* lAnneal, stepTime, totalTime, dt, cmname,
* nstatev, nfieldv, nprops,
* props, tempOld, tempNew, fieldOld, fieldNew,
* stateOld,
* eqps, eqpsRate,
C Write only -
* yield, dyieldDtemp, dyieldDeqps,
* stateNew )
C
include 'vaba_param.inc'
C
dimension props(nprops), tempOld(nblock), tempNew(nblock),
1 fieldOld(nblock,nfieldv), fieldNew(nblock,nfieldv),
2 stateOld(nblock,nstatev), eqps(nblock), eqpsRate(nblock),
3 yield(nblock), dyieldDtemp(nblock), dyieldDeqps(nblock,2),
4 stateNew(nblock,nstatev), jElem(nblock)
parameter( one=1.0d0,small=1.0d-8)
C
character*80 cmname
double precision a,b,c
k=100.0d0
m=0.30d0
n=0.15d0
C
C
do km = 1,nblock
plstrain=eqps(km)
plstrnrt=eqpsRate(km)
C
yield(km)=k*(plstrain**m)*(plstrnrt**n)
dyieldDeqps(km,1)=k*m*(plstrain**(m-one))*(plstrnrt**n)
dyieldDeqps(km,2)=k*n*(plstrain**m)*(plstrnrt**(n-one))
end do
C
return
end
I would be grateful if someone could help me figure out the error.
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Umats with Abaqus
hi, someone know how run abaqus models using user subroutines, I can run one umat with one model, but i need to run two umats in an unique model in a simple step..Thanks for you help!!
Luis.
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Storing Abaqus sensor values
Hello
I have a sensor in VUAMP subroutine to measure the diameter of a ring. I want to compare the current value with the sensor value 10 seconds ago.
Is there a way to store the sensor values and retrieve them in abaqus?
Thanks
ravikumar.
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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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Modelling moving discontinuity using XFEM
Greeting to all iMechanicians,
I am trying to model motion of discontinuity (grain boundary) using XFEM as it saves me from the computational expense required for mesh adaptation. The material behaviour on the both sides of the discontinuity is different. After any step the discontinuity might cut through an element. Then to compute the stiffness of the element I will have to integrate seperately for the splitted regions and then add them. This is easy when I have a 1-D case but seems difficult for 2-D and 3-D case. Since the discontinuity may take any arbitrary shape, I will have to find out the points in the element that lie on either side of it for which I can use signed distance function. But how do I implement this in ABAQUS. I have a vague idea that I might have to use UEL or UMAT. If somebody has faced a similar situation, please help me out.
Best regards,
Luv
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