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  1. louisa

    Abaqus System Error Code 5

    I see. I did regenerate the whole model before. I will try your suggestions of just updating the properties. Thank you, xerf. I used v6.6 before and our group just bought v6.7. Unfortunately the problem remains in v6.7 :( Maybe the ultimate solution is to earn a lot of money first and...
  2. louisa

    Abaqus System Error Code 5

    Dear All, Hope you are all having a wonderful summer! I am running the python code in CAE. My simulation involves a lot of iterations, and in every iteration, I change the material properties and run a job. But after every 10 iterations, I will get the error message saying that simulation...
  3. louisa

    Stress at particular strain

    I think you may control your increment size.
  4. louisa

    Query stress in a node?

    ah- xerf, you are brilliant! :) Yes, I want to calculate effective properties of composites. You are right. Use Gauss integration weights significantly simplifies the problem. I have another question: for each element, I should divide the integrated value by the real volume of the element...
  5. louisa

    Query stress in a node?

    How shall we probe the stress and strain tensor for an element and for the whole model? I am desperate to know this question :-) My advisor wants these tensors. I read this sentence in one paper: ":average stress and strain tensors are computed over all of the elements:" I wrote to the...
  6. louisa

    How to constrain the surface to be traction free?

    Thank you, xerf. This is a composite material and I applied uniform deformation boundary condition. Therefore unwanted stress components develop at the surface due to the underlying heterogeneous structure. I want to constrain these unwanted stress components to be zero so that I can use...
  7. louisa

    How to constrain the surface to be traction free?

    Hi Everyone, I want to specify certain stress components to be zero at some surfaces. So I tried Loads -> Surface traction -> Magnitude=0 in the Edit Load dialog box. I got the error message "Load must be created with a non-zero magnitudes unless utilizing a user subroutine". Is there any...
  8. louisa

    Zero, small, or negative element area?

    I know that the normal can be flipped in the property module. But I want to avoid negative normal from the very beginning. Since the simulation runs for many iterations, it is impossible to find the problematic faces and then reverse the normal manually every time. How to define the faces...
  9. louisa

    Zero, small, or negative element area?

    Thank you so much, xerf. Now I found this region of small or negative element area. But still I cannot identify the problem. This area of the elements in this region is the same as other regions. I googled "ErrElemAreaSmallNegZero". It seemed that this is a problem common to 2D...
  10. louisa

    Zero, small, or negative element area?

    Hello Everyone, I received the following error message while running the simulation. "Error in job try: The area of 505 elements is zero, small, or negative. Check coordinates or node numbering, or modify the mesh seed. The elements have been identified in element set ErrElemAreaSmallNegZero."...
  11. louisa

    Input: planar or 3D elastic constants?

    Hi everyone, I want to assign material properties to plane strain elements. As the elastic constants for plane strain condition are different from 3D values, should the Abaqus input be the planar values or 3D values? Thank you very much!
  12. louisa

    How to constrain side edges to remain flat?

    Dear All, I am simulating a simple uniaxial tensile test on a 2D square in 2 direction. How to constrain the left and right side edges to keep flat during the deformation? I tried tie. It doesn't work. It seems that tie is for two overlapping surfaces, but not for two surfaces that only...
  13. louisa

    Plane Strain

    Thank you so much for your reply, xerf. I have a further question regarding plane strain. I want to model a composite, say, 1-2 plane is the cross section plane of the fibers. When I create a new section, should I choose solid or shell? If solid, then what about type: homogeneous or...
  14. louisa

    Plane Strain

    Hi All, I'm a new user of abaqus, and I want to model a plane strain response. I cannot find script example of 2D problem in abaqus document. How should I do it? (1) create a 3D solid with very large thickness or (2) 2D planar (what does "Base feature: shell" mean in this case), and then...

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