I have a question about deformation gradient in VUMAT.
When I use one element, Vumat works well and there is no any problem. Initially, only the diagonal part of deformation gradient is one, the others are zero. However, the problem is when several elements are considered, all the components of deformaiton gradient are equal to one at very beginning.
I guess it is about time some one from the Cornell Fracture Group got on this site to try help answer questions related to the CFG software or other fracture mechanics related questions. We do try to answer questions sent to us via email, but sometimes a forum like this would be best and we do appreciate other users input, feedback, and answers.
I must apply a user defined heat flux to ABAQUS for getting thermal profile in defferent nodes and elements. How can I apply this user defined heat flux to AVAQUS and how can I write this user defined heat flux for ABAQUS?
This days, I am working on the dynamics analysis using the Abaqus. the implicit dynamic integration method in abaqus is HHT-alpha. I found that a very strange parameter about the method is the half-step residual tolerance . I don't know the parameter is whether important or not and how to determine it.
Does anyone can help me on spooles package's iterative method ?
Dear everyone :
I need your help !
I am using spooles , and I have successfully
use it in direct methods which is in directory
/misc/drivers , and I have run into problems when
I use the code in /Iter/drivers , for the demos in it
, I have run successfully , but I want to use the same
matrix of A and b as in direct method when I do in direct,
in fact , I am use a fortran code for main program , I
only to take use of spooles as a subroutine , to solve Ax=b for
me, the code iter.c in Iter/drivers , is a main c program , and I want to
change it as a subroutine for my fortran main program .
and I don't know how to change it to a suitable code . because in the
I model a reinforced concrete column in ansys . ( with william-warkne criteria )
During Bending Loading the below error was appear .
Please guide me That Error What's meaning ?
*** FATAL *** CP = 93.507 TIME= 12:07:01
The supplied nonlinear material properties produced an incorrect
material tangent matrix. Please check your TB input carefully. A
very small yield stress may cause this failure.
I model a reinforced concrete column in ansys .
I Want to Know What's the criteria for load step and I Should Follow what criteria for load step to reach to the best Result.
I model a reinforced concrete column in ansys .
I want to know that in this picture what's meaning 'CP' , 'CP' is abbreviation of which Words and what's unit of that .
I model a reinforced concrete column in ansys .
after loading the model three types of crack will exist in it . ( First Crack,Second crack,Third Crack)
I want to know what difference between those .
is differences between those due to time of their existance or for other reasons ?
If diffrence due to time of their existance , what criteria for time is considered ?
I was wondering whether CosmosWorks could help me solve this ( node/5016 ) ?
I prefer to stay with SolidWorks because I already use it for 3D modeling so I guess it will be easier to learn,
but if necessary I would also consider software like Simulink.
What do you recommend?
Just attended a FEMA introduction course put on by my provincial engineering assoc. We all received a copy of Abaqus Student Edition.
When I install the program on my Toshiba Windows Vista laptop the installation completes but when I start the program and try to draw a part instead of getting a blue grid I get a second white drawing sheet overlaying the first.I have tried numerous installs and have all the latest Vista upgrades. My copy of the DVD is good because the program works on my desktop computer.
I have to model with the Ansys software a beam in concrete material. It must be non linear.
In materials properties, I can choose Materials models - Structural - nonlinear - inelastic - non metal plasticity - concrete.
I put the Elastic Modulus, the Poisson´ratio, the uniaxial cracking stress and the uniaxial crushing stress. But I don´t know how I can enter the values of the strain at fc (compressive cylinder strength) and the value of the fracture energy.
The plot is showing a value typically obtained at the integrations points (in this case a single integration point).
Normally you would make a plot like this by taking the mean value of the surrounding elements to each node, then making a interpolated plot like this. However, it is obvious this is not the case around the red node, as it has several different values in the same node.
The plot is showing a value typically obtained at the integrations points (in this case a single integration point).
Normally you would make a plot like this by taking the mean value of the surrounding elements to each node, then making a interpolated plot like this. However, it is obvious this is not the case around the red node, as it has several different values in the same node. This behaviour happens quite often for me in ABAQUS/CAE, and it is quite annoying as the strange looking plot makes the results seem less trustworth.
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