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Recent content by ecFem

  1. ecFem

    Fastener RBE Post-Processing Issue. Solid averaging.

    Thank you very much SW and Blas for your time and awesome answers ! I've read many of your articles in your blog Blas, they are magnificent. And as a Spanish speaker most of them are even easier to understand.
  2. ecFem

    Fastener RBE Post-Processing Issue. Solid averaging.

    Helllo all, I'll post two different questions in a same thread. ----------------------------------------------------------------------------- Question 1 I have made several fastener connections in a model, through spider RBE3s and the fastener represented by a RBE2. I leave an image so you...
  3. ecFem

    Questions about HEX mesh

    Hello, I hope you are doing well. I have some questions concerning HEX mesh. My idea is to mesh a pin with HEX elements. I divided the fairly simple geometry into three cylinders, so it can be easily HEX meshed (without using the HEXMesh Bodies feature of FEMAP). I'll leave an image of the...
  4. ecFem

    Reading loads on RBE2 element used for bolt representation

    Hello, I am using RBE2 elements to represent bolts that link three plates together. The dependent node is in the top plate (where the load comes from) and the other two dependent nodes is one in each one of the bottom plates. I leave an image below so it is easier to understand. I have...
  5. ecFem

    Dynamic/Impact loads : Short high-g inertial loads

    Hello, I am analyzing a structure that it's going to be transported by road and by airplane. Following standards we saw that normally for these transports the structure shall support at maximum 2.2g in all directions. Hence, the structure was designed to withstand up to 3g (4g in best-case...
  6. ecFem

    Modify FEMAP's horrible element border colors

    Monsieur you deserve the heaven haha Thanks !
  7. ecFem

    Modify FEMAP's horrible element border colors

    Hello all, Quick and stupid question : Why FEMAP has such awful colors ? Besides that, does anyone know a way to modify the color of the borders of the elements ? Because, as you can see in the image below, I select a blue color for the elements but FEMAP says "okay, I am gonna put an AWFUL...
  8. ecFem

    Best way to mesh large surface with small holes

    Thank you both for your answers ! They were really useful. Cordially, EC
  9. ecFem

    Best way to mesh large surface with small holes

    Hello, I would like to start a discussion about the best way (mesh quality vs number of elements vs results accuracy) to mesh a large plate with a lot of small holes. The thing is that I have a large plate (2000 [mm] x 1350 [mm]) which contains a lot of small holes (diameter 3.2 [mm], see...
  10. ecFem

    CGAP elements to restrain movement in -Z

    Thank you very much Blas ! It was the thing that was missing.
  11. ecFem

    CGAP elements to restrain movement in -Z

    Hello, I hope you are well. In the model I'm working with, I have to simulate a plate that rests over some rollers. Then, I want to simulate the rollers as constraints that only block the displacement in one sense for a given direction, i.e., for -Z the movement is constrained, but for +Z the...
  12. ecFem

    Stress-strain curve not respected in NL analysis

    Thank you both very much for the your answers and the time you took responding to this topic. I have three questions that come to my mind after reading the thread : 1. Why does the Max Principal Stress not give the correct curve ? In my opinion it should as is always taking the maximum normal...
  13. ecFem

    Stress-strain curve not respected in NL analysis

    Hello rb1957, Thanks for your answer. I looked at both. I could run the analysis with a linear material, but I have no interest in doing so because I need the material to undergo plasticity.
  14. ecFem

    Stress-strain curve not respected in NL analysis

    Hello, I hope you are doing well. I am doing a burst analysis of a vessel. Consequently, NL material has to be introduced. Hence, I introduced the stress-strain curve and selected the Plasticity NL option. I followed what the NX Nastran's manual says : The first point of the curve is (0,0)...
  15. ecFem

    Symmetry BCs in pressured vessel + Non-linear material

    Hello, I hope you are doing well. On one hand (Symmetry BCs in presured vessel) : I have been strugling for a while, thinking about the proper way to define the symmetry conditions for the model I am studying. It is a simple pressured vessel, then, as it is symmetrical, I am analyzing a...
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