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  1. yanger11

    Viscoelastic properties

    Feng, In the past when I have defined viscoelastic material models I created a table from the viscoelastic parameters of the modulus over time. ABAQUS manual has a good explanation of how to enter the viscoelastic data
  2. yanger11

    Connectors attched to deformable body

    thanks, that worked out well
  3. yanger11

    Initial velocity not in the initial step?

    try defining a predefined field
  4. yanger11

    aborted with system error code 5

    I am getting this error message. I don't know what it means "aborted with system error code 5"
  5. yanger11

    Connectors attched to deformable body

    I have a 3D deformable body that is being pulled with linear connectors attched to the other end. As the body is pulled there are stress concentrations at the location of teh connectors to the deformable body. Does anyone have a suggestion or a way to apply to connectors with out getting the...
  6. yanger11

    multiple loads on rigid body

    How do I assign multiple concentrated loads at different locations on a rigid body? I can assign a sinlge load at a reference point but iwant to apply multiple loads.
  7. yanger11

    transversley iostropic

    I have a semi circular solid that I want to define trans. isotropic material properties. I defined material orientaions but how do you get the material orientaions to follow the curve of the semi-circle?
  8. yanger11

    Viscoelastic properties

    I am trying to run a viscoelastic model. Is there a method that allows for tranversely isotrpoic viscoelastic material properties. I am able to run isotropic elastic but I cannot run the trans. iso. viscoelastic
  9. yanger11

    Meshing problems

    I am importing parts and I want to use poroelastic conditions but the problem is too big to run with quadratic elements. I can not select linear elements though. Is there a setting where I can run the contact problem with linear elements?
  10. yanger11

    VOL FLUX error

    I get the following warning in a contact problem with two poroelastic deformable bodies: "There is zero VOL. FLUX everywhere in the model based on the default criterion. please check the value of the average VOL. FLUX during the current iteration to verify that the VOL. FLUX is small enough to...
  11. yanger11

    nodes may have incorrect normal definitions

    I am getting this warning, "nodes may have incorrect normal definitions" and I do not understand how to fix it. From the manual, it suggests that it has something to do with how I define my contact surfaces but I do not understand how to redefine my contact surface to fix the error
  12. yanger11

    nonlinear spring elements

    In order to prestrain a nonlinear spring elements I defined a nonlinear-elastic connector with the force-displacement curve, then I entered the zero load length with the reference length option. Is this the correct method to do this?
  13. yanger11

    permeability

    I am modeling a poroelastic material. My k is in mm^4*N^-1*s^-1. The input into ABAQUS needs to be in LT^-1. What are the conversion factors?
  14. yanger11

    amplitude adjustment

    It was a time increment error. But I added another step that keep the displacement constant after the loading step. Thank you for your time
  15. yanger11

    amplitude adjustment

    I am doing a contact analysis. I have a beam with a fixed bottom and I give it a uniform diplacement on top. I apply the disp. as a ramp over the step and it works fine. I apply an amplitude to the displacemnt to perform a stress relaxation analysis, however, when I run the program with the...
  16. yanger11

    Applying material properties with respect to cylindrical coordinates

    I have an object where i want to assign the material properties with respect to the radial, circumfrential and axial direction. I assigned a material orientaion to the part but I do not know how to assign the material propeties to correspond to the datum refernecs I created. Will assigning a...
  17. yanger11

    Insering a datum point of a face

    I tried a few methods but is there any way to insert a datum point of a curved surface 9in order to attach a spring to that surface. i tried projecting onto teh surface but the surface is very irregular and the datum point does not project where I need it to
  18. yanger11

    Element too distorted?

    I have the same problem. How did you fix it?
  19. yanger11

    Distorted elements

    I am adjusting my seeding and my mesh but i cannot fix all my distorted elements. Whats the best technique?
  20. yanger11

    Initial Conditions, void ratio

    I am perfroming a contact analysis with a porous material and I get a error that reads "Permeability is specified on 20 elements but the initial void ratio is not defined. Use *initial conditions to the value. The elements are identified in element set ErrElemPermNoInitVoidRatio." I have tried...

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