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Recent content by T.Gmai

  1. T.Gmai

    VUSDFLD Subroutine

    Thank you so much, you helped me to narrow down the issue I thought about memory, parallelization .. I solved it! you are right it is in the subroutine, I found a mistake in the interface when I copied it from abaqus documentation I forgot to change strain by stress: field(nblock, nfieldv)...
  2. T.Gmai

    VUSDFLD Subroutine

    Hi all, I am working on a damage model (ductile damage: fracture strain as function of Triax and Lode parameter), and I need to change the fracture energy for the damage evolution as a fuction of triaxiality for that I wrote a VUSDFLD subroutine I tested the fortran code on for 1 element...
  3. T.Gmai

    J integral determination from DIC

    Hello, I am trying to calculate the J integral using Digital image correlation in SENB steel specimen, there are some papers discussing the method but not in details. my problem is that I have no idea how to create a path and extract the results (displacement and strain filed for the...
  4. T.Gmai

    Problem with the reaction forces in a 3-point bending model

    Elastic-plastic for both, to capture the plastic behavior I used true stress strain curve from the tensile test.
  5. T.Gmai

    Problem with the reaction forces in a 3-point bending model

    The geometry is exactly the same, the only difference is the crack length. I tried to change the material in one of the model with the closes crack length that I need but still have the same issue. one of the material is highly ductile, the other is more brittle I am afraid that the model is...
  6. T.Gmai

    Problem with the reaction forces in a 3-point bending model

    Hi everyone, I am modelling a 3 point bending test on a SENB specimen with a fatigue precrack using Abaqus/standard. For the FEM model I've used 3D solid to model the specimen and discrete rigid body to model the punch and roller, as for the crack I've used contour integral. I applied a...
  7. T.Gmai

    numerical and experimental correlation

    Thank you for your reply. I didn't use the material calibration tool, I just transformed the engineering stress strain from the tensile test to true stress strain using the equations in excel and implemented in abaqus.
  8. T.Gmai

    numerical and experimental correlation

    Hi all, I am modelling a steel Double edge notched tensile (dent) specimen in abaqus/implicit. I used for the model isotropic hardening, the material properties are acquired from standard uni-axial tensile experiment, quad elements with reduced integration are used and a very refined mesh near...
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