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  • Users: yaston4
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  1. yaston4

    Check on FE formula

    Hi all, I have found this equation in a paper (please see link below), the paper does not explain the "G" term, and I have not seen this before in an FE formula. Just wanted to check that this term was indeed "Force". Or am I missing something...
  2. yaston4

    References on Energy Checks

    Hi all, In the past a number of the engtips community have provided really nice advice on the checking of energies when running FE analysis and during the post processing of results. I am just wondering if there are any references to specific material on this subject so I can learn more. I...
  3. yaston4

    New to welding

    Hello all, I am a mechanical engineer by profession, I am planning a kit car building projech which will involved welding to learn and improve my skills. I would like to carry out the welding myself and therefore will need to learn as much as I can, does anyone have any experience with welding...
  4. yaston4

    Relationship between structures Natural Frequency and Contact Mechanics

    I understand that techniques such as FEA can be used to the mode shapes and natural frequencies of structures. I am wondering if finding out the mode shapes and natural frequencies can help in providing any information or inclination of the the materials ability to cope with contact conditions...
  5. yaston4

    Applying cyclic loading in DIRECT CYCLIC step

    Hi all, I have been through the relevent sections in the manual and understand the parameters to apply in a direct cyclic analysis using the Abaqus/Standard DIRECT CYCLIC Step, however. I am not sure how I apply my amplitude to my pressure load. I want to apply 1000 load cycles, the time...
  6. yaston4

    ErrElemVolSmallNegZero with Orphan Mesh

    I am running analysis with an orphan mesh and the analysis exists with the following error message: ***ERROR: The volume of 1 elements is zero, small, or negative. Check coordinates or node numbering, or modify the mesh seed. In the case of a tetrahedron this error may...
  7. yaston4

    Link between surface stress and shear stress with wear

    Hi all, I am trying to understand more about the contact properties used in finite element analysis packages. I am using Abaqus and I have been defining different values of friction coefficient between contact surfaces. The values I tend to use is between frictionless and 0.3. However I have...
  8. yaston4

    Shear Stress Help

    Hi all, I know if I have a simple 2D model a model a square along x-y, then I could simply look at S12 to determine the shear stress, but what about the shear stresses of a complex 3D model? I know there is also S13 and S23, but need some advice on this. I am particularly interested in the...
  9. yaston4

    Using energy results

    Hi all, In you stress, strain and contact analysis simultations, I am trying to learn more about how the experts use energy results to confirm the validity of the results. Thanks
  10. yaston4

    Run abaqus script from Python interpreter

    Hi all, At the moment I am running my Abaqus scripts through CAE using file -> run script -> scriptname.py Is any code I can use in my python script to run it outside of CAE straight from the python interpreter? Thanks.
  11. yaston4

    What exactly is a "rough" surface?

    I am trying to find the definition of a "rough" surface in terms of numbers, equations or something that can help me distinguish between a "rough" surface and a "smooth" surface. You might ask why this is important? There are some "rough" surface mathematical models I have seen from Williams...
  12. yaston4

    Applying Stress-Strain curve in Abaqus

    Hi, I would really like to clear this up I have some stress stain curve data as follows: stress (MPa) % 0 0 567 0.0008 600 0.021 640 0.053 690 0.11 680 0.1022 Can I apply this data directly into Abaqus? It seems that the...
  13. yaston4

    Dimensional Wear Cooefficient

    Hello all, I have a metallic material and I would like to find out the "dimensional wear cooefficient" of the material in the units mm^3/Nmm. Does anyone know if and how this is possible? Thank-you.
  14. yaston4

    Abaqus with Cuda

    Hi all, Just wondering if anyone has any experience with using Abaqus in combination with there graphics cards. I here Nvidia Cuda technology can help improve computational performance. I am currently looking for a new graphics card and wondering if I can purchase a cost effective option to...
  15. yaston4

    Modelling with rigid and deformable backing components.

    Hi, I would like some input from the community, to help reduce the complexity and run times of my FE analysis I sometimes use rigid backed components instead of deformable ones, e.g. instead of modelling a soft road where a tyre rolls over it, you just make the road surface rigid. The problem...
  16. yaston4

    Changing nodes from a .odb file

    Hi all, I know tat we can take the nodal coordinates of a model from the .odb file. I would like to know if there anyway of changing the coordinates of the model in the .odb file to be re-run in abother analysis. Thanks
  17. yaston4

    Relative contact motion

    Please help, I really need some inspiration from other FEA users. I have a problem involving contact between two objects, and the objects move relative to each other, could you please share some experiences of how you achieve this in FEA programmes. I am currently using ABAQUS. Thank-you.
  18. yaston4

    Obtaining material stress-strain curve

    Hello all, I would like to get some input from experienced engineers and materials scientists. I am after the stress-strain curve to use the data for my FE analysis material model. The material is a particular ASTM material. I have not been able to find the material data available and so it...
  19. yaston4

    Python script - obtaining nodes on a surface set

    Hello all, I am writing a python script and for part of that I would like to obtain the nodes, coordinates and displacements which are within the geometry "surface set" that I have defined on a surface. Is it possible to do this, if so, how would this be done. Thank-you, really appreciate your...
  20. yaston4

    RAM usage

    Hi, is there anyway to force abaqus to use more RAM during the analysis. The total amount I state in the job module never seems to get used during the analysis. Just wondered if there was a way to make abaqus use all the ram I state to speed up the run times. Thanks.

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