Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. RBureau

    Corotational coordinate system in a VUMAT

    Hi, As I understand from the VUMAT documentation, the coordinates of tensorial quantities in a VUMAT are expressed in a corotational coordinate system. The later is either the global coordinate system, or a user-defined orientation, rotated by R, where R is obtained from the polar decomposition...
  2. RBureau

    Reaction force on rigid body

    Alright, thank you for your answer. I had already tried to extract the reaction force from the target boundary, but the results were inconsistent (maybe I did it incorrectly). However it works fine with the contact force, thanks!
  3. RBureau

    Reaction force on rigid body

    Hi, I am modelling a rigid projectile impacting a target in abaqus explicit 2021. The projectile has a reference point, with a mass and an initial velocity along the y direction. All other DOFs are constrained on the projectile. The simulations run well, but I cannot figure out how to extract...
  4. RBureau

    ABAQUS scripting region argument yields inconsistent nodeSet

    The symmetry boundary condition seems to be indeed the culprit. Damn! I just tried on a set that has no symmetry on it, and it works fine.
  5. RBureau

    ABAQUS scripting region argument yields inconsistent nodeSet

    Alright, thanks for checking. I have a symmetric boundary condition on the node set of interest. Maybe that's the culprit. In my case, print(len(myNodeSet.nodes)) gives the good number of nodes, but getSubset(region=myNodeset) returns whatever. Surprisingly enough, my workaround involves using...
  6. RBureau

    ABAQUS scripting region argument yields inconsistent nodeSet

    I wondered the same thing, since I use 8-nodes elements, and I have exactly 8*130 = 1040 values. However, the node labels make no sense at all. They do not correspond to nodes I defined, they repeat, and they feature extremely low force values. In any case, I have a workaround and I can still...
  7. RBureau

    ABAQUS scripting region argument yields inconsistent nodeSet

    In essence, that's already what I do. I just count the number of entries in rmyNoddeSetValues instead of printing them. I just ran your code, and I get 1040 printouts, with inconsistent node numbers. Below are the first and last 5 printouts: 22 [-13.433395 -0.46440947 -0.02727298] 23...
  8. RBureau

    ABAQUS scripting region argument yields inconsistent nodeSet

    Thanks NRP99. The statement: myNodeSet = odb.rootAssembly.instances["TENSILE"].nodeSets["SYMX"] already creates an OdbSet, containing the 130 nodes of my set. I still do not know why, when I later use getSubset(region=myNodeSet), I end up with more than 130 nodal values. Worse even, these values...
  9. RBureau

    ABAQUS scripting region argument yields inconsistent nodeSet

    Hi all, I have a simulation of a tensile test featuring 10010 nodes, and in that simulation I have a node set of 130 nodes named "XSYM", for which I would like to extract nodal forces using python scripting. I run the following code, which is pretty standard, but the call to getSubset creates...
  10. RBureau

    Restart analysis with *Extreme element value

    Alright, after multiple trials, I have the solution: I removed the *Restart, write card from the first job and all came together. As restart files are automatically written by ABAQUS Explicit, it feels like using a *Restart, write explicitly in the first job makes for a double usage?? The weird...
  11. RBureau

    Restart analysis with *Extreme element value

    Thanks for the advice, I'll try something like that also. I just noticed that my .res file is only 260 Ko big, and that the results of step 1 are not transported to the new job. I suspect Abaqus does not save the restart information correctly, hence the error. I'll try to fix that first.
  12. RBureau

    Restart analysis with *Extreme element value

    Hi all, I am trying to simulate a classical tensile test on a sheet specimen in abaqus explicit, but I want to stop the simulation after PEEQ exceeds a given value (say 0.1). I use the statements: *Step, name=Step-1 *Dynamic, explicit ,100 [... bulk viscosity, mass scaling, boundary...
  13. RBureau

    Fracture Strain (Shear Damage)

    As FEA Way mentioned, the couple of keywords *DAMAGE INITIATION and *DAMAGE EVOLUTION are used to define progressive damage. Subsequently, it is adapted to ductile materials. In your first example, I would still refer to the first drop as the onset of damage. However, given that you have a...
  14. RBureau

    Fracture Strain (Shear Damage)

    Hi, From what I gather, if you use *SHEAR FAILURE, the fracture strain is the red one. Regards
  15. RBureau

    Eroding projectile impacting eroding plate in CAE

    I thought I tried that too already (even before my first post). I'll try again, for good measure, but I am already satisfied with the "no automatic free surface generation" answer. Thanks anyway!
  16. RBureau

    Eroding projectile impacting eroding plate in CAE

    Alright, thank you both for your answers. @Mustaine3: I was precisely wondering if I could do without editing keywords. I already set up my simulations using input files, but I wanted to share a CAE-only version. However you confirmed to me that there was no automatic recognition of interior...
  17. RBureau

    Eroding projectile impacting eroding plate in CAE

    Hi all, I guess the question is in the title: is there a way to model the "Eroding projectile impacting eroding plate" problem in the CAE? Especially, can the elemental eroding surfaces be created in the CAE? Thanks

Part and Inventory Search

Back
Top