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  1. goeasyon

    Reading & comparing Input files

    WinMerge for Windows and Meld for Linux, I always use them. https://welsim.com
  2. goeasyon

    how can I calculate the stress in X- and Y-direction

    According to the elasticity constitutive relation, stress_vector = C_matrix * strain_vector, where the vector has a size of 6, and C_matrix is the stiffness with the size of 6x6. If your material is isotropic and linear elastic, both strain_x and strain_y are zero. To determine the stress_x...
  3. goeasyon

    Contact pairs in ANSYS

    It seems that you are applying multiple contact pairs, you can suppress the contact pair objects one by one and figure out which pairs cause that warning. I don't know what does your CZM stand for, you may temporarily remove the CZM values and see if the warning goes away. https://welsim.com
  4. goeasyon

    Export STEP file from Creo to Solidworks

    STEP is a neutral format of geometry data and supported by many software applications. You can try to load the STEP file using another CAD/CAE application, to see if the zero thickness exists. You also can double check your thickness definition from the Creo, and set a thickness value to the...
  5. goeasyon

    Finite Element Analysis Question

    You can compare the maximum stress with the yield stress material and some safety factors. https://welsim.com
  6. goeasyon

    LOADS

    You meant one load step contains ten substeps? https://welsim.com
  7. goeasyon

    HELP!! How to connect Truss element to 3d body

    You can use the Constraint Equation to bond the node at the end of the line to the target surface element. https://welsim.com
  8. goeasyon

    fortran compiler for parallel programming.

    Gfortran is free and can be used together with MPI or OpenMP. For the Windows application, the Intel Fortran compiler is easier to use but not free. https://welsim.com
  9. goeasyon

    Finite Element Method/Analysis (FEM/A) book list

    A really nice list of FEA books. https://welsim.com
  10. goeasyon

    Nonlinear simulation with Hyperelastic Ogden material

    Every commercial software has different GUI design in terms of parameter input. You may need to read through the user manual or contact the customer support. https://welsim.com
  11. goeasyon

    Assigning Thickness to 2-D Shell Elements

    The mid-surface assumption seems to hold for most of the shell theories. https://welsim.com
  12. goeasyon

    last increment is not converged

    Looks like a software defect. Non-convergence happens as the nonlinearity becomes very strong in the model. However, such off-the-range nodes/elements should not be displayed on the screen. https://welsim.com
  13. goeasyon

    Cyclic Displacements in ANSYS Workbench

    This looks like a two-body structural analysis with a contact surface. Here are steps that you could try: (assume geometries have been imported/created, and meshing is completed) 1. assign material to each body 2. add a contact pair object and define the target and contact surface 3. add a...
  14. goeasyon

    RPC define types

    It is difficult to tell the root cause and give a solution without seeing the source code. However, based on the output error message, the "#define" macro has the syntax issue. In the c programming, the #define should go like "#define _NETINET_IN_H_". Are you sure the "in.h" should be compiled...
  15. goeasyon

    Simulink Domain Error - Complex numbers?

    It seems that the error message has promoted a solution for you, use “asin(complex(x))” to replace asin(x), does it work for you? https://welsim.com
  16. goeasyon

    Non convergence

    Since the error is about mesh refinement, did you turn on the mesh refinement feature such as mesh adaptivity? Back to the convergence, the strongly nonlinear model does not convergent all the time. It highly depends on your specific model, parameters, meshes, etc. For some extremely nonlinear...
  17. goeasyon

    Element shape violation warning

    Yes, it can be caused by different release versions. Or you could try to run the same script on the third computer that has an AMD CPU, see if the element shape violation limit can be reproduced? https://welsim.com
  18. goeasyon

    Visual Studio & usermat question...

    VS2017 may work, depends on how big difference between VS2012 and VS2017, and also depends on the libraries from Ansys. Since the VS2012 is recommended, I could assume those dependent libraries from Ansys are built with VS2012, using the consistent compiler is always a better choice...
  19. goeasyon

    Visual Studio & usermat question...

    I can better answer your question if you provided more information. Generally, you always can use a Visual Studio 2017, professional, enterprise, or community version. I guess you were asking about building your own user-defined routines on/linking other dependent libraries. If your dependent...
  20. goeasyon

    linear extrapolation

    No matter what types of elements, the extrapolation algorithm is identical. Here are the general steps: 1. get the shape function for your specific element type 2. the value at each node can be calculated by the multiplication of shape function and stress value at integration points...

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