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mrtimwinkler last won the day on January 15 2019

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  1. Hello Turbokraken, thank you very much for your help! This will be the best solution, especially in the long term and for future projects. Best regards and happy simulating, Tim
  2. Hello Q. Nguyen-Dai, thank you for your your answer. Unfurtunally, the geometry is more than just that one fillet with many curves and non-parallel edges to global axes. I am searching for a way to assign all of them at once.
  3. Hello, i have a curved shell-geometry on which i like to reorient the nodal coordinate systems to follow the curvature. I only like to do that for the nodes on the edge. With that nodal systems i like to assign rotational boundary condition following the curvature of the shell-geometry. I am using OptiStruct for Solving. How do i proceed to achieve this goal? Thank you very much for your help! With kind regards Tim
  4. Hello, how do i request to let Optistruct automatically write a tabluar file after the analysis (non-linear quasi-static), for example column 1 displacemen of a certain node and column 2 SPCF of this certain node? I dont want to do this with HyperView and export graph, because there are to many analysises so i want to do it automatically. The PUNCH file format only writes the results of the last timestep and don`t allows SPCF in non-linear quasi-static. The time history file T01 ist not available for non-linear quasis-static analysis either. Thank you very much for your help! With kind regards Tim Winkler
  5. Hello, how do i screen the element normals of brick elements/ surface normals of a part to check them for contact definition? Thank you very much! Tim
  6. I found it out my self. There is a master node in the rigid wall, where you can define a separately time history record of the displacement.
  7. Hello Ivan, thank you very much for your answer! How do i record the displacement of the rigid wall? In the time history options of the rigid wall you can choose the forces as variables only. Unlike with rigid bodys there is no master node in rigid walls to record the displacemnt separately. Thank you very much for your help. Tim
  8. Hello, how do i plot the rigid wall force over the rigid wall displacement and not over the time? Thank you very much! Tim
  9. Hello and thank you very much for your answer! The problem is not that the failure criteria is not reached (i have tried all of the Ioff choices with very low failure criteri limits) but that the element is not been deleted. The stress is always set to zero but the element is not been deleted. Is this a problem of the element type or property? In the same model with shell elements the elements are deleted. In the reference guide they say the deletion is posible for shell elements and thick shell elements and my model is made of thick shell elements.
  10. Hello, i simulate a three-point-bending crash test of a FRP. Therfore i use 1 solid element over the thickness, a thick-shell property (22) and the material law 25. In the material law 25 i use the energy failure criteria with the element-deletion flag Ioff=2 and a specific Wpmax. Unfortunately, when the energy failure criteria is reach, the element is not deleted but the stress is set to zero and hourglassing is beginning. How do i let the elements be deleted if the failure criteria is reached? Thank you very much! Tim
  11. Hello, i have a FRP with the following elastic parameters: E1, E2, G12, nu12. The parameters needed in the material card are E11, E22, E33, NU12, G12, G23, G31. E11 = E1 E22 = E2 E33 = E2 NU12 = nu12 G12 = G12 G23 = ? G31 = ? How do i find the missing two shear modulis? Thank you very much for your help! Kind regards Tim Winkler
  12. Hello, what are the RST-vectors? How the orthotropic direction is defined? Thank you very much for your help Kind regards Tim Winkler
  13. Hello, i like to simulate a tensile test of an UD FRP in HyperCrash. Therefore i use BRICK elements, the material LAW25 and the propterty TYPE6. To model the 90° fiber direction (perpendicular to the velocity boundary condition) i made a skew (to see in the bottom right corner of the pictures 2 and 3) and used it in the property type 6 to define the orthotropic direction (to see in picture 1). Now the RST vectors (what are these?) dont have the right and uniform orientation (to see in the pictures 2 and 3) How do i define a 90° fiber direction? Thank you very much! Tim
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