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  1. kooshaa

    Reaction force on a deformable part

    Hi everyone, I am trying to simulate a tube bending process using abaqus. Instead of applying the bending motion directly to the bending head (tool which bends the tube) I need to apply it from a certain distance from the bending head. I have tried attaching a rigid wire to the bending head...
  2. kooshaa

    Reaction force on an axis

    Dear all, I have run a bending simulation including a superposed torque. As you can see in Fig. 1 (excuse my quick and dirty sketching [smile]), the profile is passing through 2 feed rolls and then coming between four smaller rolls (Bending Head)which is responsible for bending and torsion. I...
  3. kooshaa

    Defining a material which behaves differently in tension and compression

    Hi everyone, I am simulating a tube bending process in Abaqus. The steel that I am using has different flow stress curves in tension and compression. Is there any way to attribute these two curves to my material model? (preferably in Abaqus GUI) Thanks
  4. kooshaa

    [Urgent] Subroutine which changes the Young's modulus according to changes in Engineering Strain

    and is there any need to convert my experimental data to true strain?
  5. kooshaa

    [Urgent] Subroutine which changes the Young's modulus according to changes in Engineering Strain

    Hi Everyone. The model that I am currently trying to simulate in abaqus has a material that its Young's modulus (E) is decreasing with the increasing of the engineering (total) strain. I tried to write a VUSDFLD subroutine (my model is Dynamic Explicit and since I am an absolute beginner with...
  6. kooshaa

    How to update Young modulus according to change in plastic strain in Abaqus GUI

    True. I have not found any way to change the Young's modulus (E) in the Abaqus GUI. I tried to write a VUSDFLD subroutine (my model is Dynamic Explicit and since I am an absolute beginner I would like to avoid VUMAT). I found an old thread here...
  7. kooshaa

    How to update Young modulus according to change in plastic strain in Abaqus GUI

    Hi Everyone. My materials Young's modulus (E) is changing with the increasing of the plastic strain. How can I implement this behaviour in abaqus GUI (since I'm not good in scripting)?
  8. kooshaa

    How to change the material orientation in ABAQUS???

    Thank you Mustaine3. It worked
  9. kooshaa

    How to change the material orientation in ABAQUS???

    I am trying to make a model consisting of a tube being deformed to a triangle cross section. I wanned to have a homogeneous orientation, meaning that I wanned that the first material orientation (x) to be in a same direction for all the elements (and the same thing for the second material...
  10. kooshaa

    Negative Total Energy????

    Dave442, I did what u said. Here is the energy components for the whole model. http://files.engineering.com/getfile.aspx?folder=d03fc299-f68e-44cd-9683-ce8694429c43&file=graph.png The three big components are: External work (ALLWK), Internal Energy (ALLIE) and Plastic dissipation (ALLPD). It...
  11. kooshaa

    Negative Total Energy????

    I plotted the components of the total energy. To my surprise there was no negative component! here is the plot...
  12. kooshaa

    Negative Total Energy????

    Can it be because I have compression?
  13. kooshaa

    Negative Total Energy????

    Is it possible for total energy to be negative in abaqus simulation? For better understanding of my problem I attached the screen shot of the process. http://files.engineering.com/getfile.aspx?folder=cac5295b-54c3-47ab-b32a-6111f0b1b10a&file=Unbenannt.png
  14. kooshaa

    HELP ! URGENT ! Export deformed shape into any CAD format from ABAQUS

    Dear rstupplebeen, Tnx for the answer but as I said Unfortunately that option doesn't work. It only export the tool geometry and not the part geometry.
  15. kooshaa

    HELP ! URGENT ! Export deformed shape into any CAD format from ABAQUS

    thread799-178458 Hi everybody, I have done an analysis in abaqus and then I had to export the final part geometry in a CAD file. But unfortunately the abaqus add-on for direct export of the final part geometry is not working so I have to write a python script for it. There was a thread many...

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