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  1. jonny17

    ALE Adaptive Meshing

    Hi everybody, I have a couple questions regarding ALE adaptive meshing. I was experiencing excessive distortion during my Abaqus analysis causing the job to abort. I was under the impression that using ALE adaptive meshing would be able to prevent this distortion from occurring. However, when...
  2. jonny17

    gravity force applied to a model

    thanks problem solved!
  3. jonny17

    Error Message

    I forgot to add that along with the friction and damping contact properties I have also given a normal linear contact stiffness of 471N/mm. Please help!
  4. jonny17

    Error Message

    Hi all, I am currently doing an impact simulation of a human skull and a rigid planar shell surface i.e. 'floor'. However I am getting an error message part way through the job. "The ratio of deformation speed to wave speed exceeds 1.0000 in at least one element. This usually indicates an...
  5. jonny17

    Finding position wrt time

    Hi all, I am simulation a drop test. I am wondering if there is a way to find the location/position of a node or the centre of mass of a model with respect to a global coordinate system wrt time? I am hoping I can use this to find angular acceleration. Thanks
  6. jonny17

    gravity force applied to a model

    Hi all , I am quite new to abaqus and am wondering when applying a gravitational force to a falling object in the z direction would the force be -1 , as in -1g, or -9.81? Or because my model is in mm -9810? Thanks
  7. jonny17

    Calculating angular and linear acceleration from a hollow object on drop test

    Hi all, I was wondering if anyone could suggest a method for calculating the angular and linear acceleration from a hollow part during a drop test. I have attempted creating a set of the whole object to no avail. Is there a way to history output directly from the centre of mass? I have tried...
  8. jonny17

    Creating datum at Centre of mass

    Hi all, Is it possible to create a datum point at the centre of mass of an object? I am looking to find the acceleration of an object during impact from the centre of mass. I thought creating a datum at the centre of mass then creating a history output at that point would be the best way to...
  9. jonny17

    Making 1 part from 2 seperate parts

    Hi all, I currently have 2 parts - 2 halves of a cycling helmet - that I need to make into one combined part. Is this possible? I have tried instancing the parts and merging them together. However this only allows me to merge them as a mesh. As this model needs to be exported to Simpleware to...
  10. jonny17

    Creating a large mesh of thin parts

    Hi all, I am looking to create a thin layer of multiple wires/thin metal strips. At first I would assume to do this one part would be created then using the linear pattern tool in the assembly to multiply the part. However I can only assume this would increase the computational demand far too...
  11. jonny17

    Maximum stress on a surface

    Hi all, Is it possible to report maximum stress (V. Mises) for a particular surface as opposed to the maximum stress for the entire model? For my model I have an applied pressure to the top of a knee implant. I need to find the maximum stress for the entire model, which have been obtained, and...
  12. jonny17

    Best method of Integrating a sensor/wire into an existing model?

    Thanks guys! Both work as needed.
  13. jonny17

    Maximum stress on a surface

    Hi all, Is it possible to report maximum stress (V. Mises) for a particular surface as opposed to the maximum stress for the entire model? For my model I have an applied pressure to the top of a knee implant. I need to find the maximum stress for the entire model, which have been obtained, and...
  14. jonny17

    Best method of Integrating a sensor/wire into an existing model?

    It would ideally be a solid element. Can you expand what you mean when you say perform Boolean operations? How would this be done. Thanks
  15. jonny17

    Best method of Integrating a sensor/wire into an existing model?

    In addition to this is there a way to select a thin section of elements and change their material properties, for instance if it had been cast that way.
  16. jonny17

    Best method of Integrating a sensor/wire into an existing model?

    Hi all, I am looking for the best method of modifying a solid structure on ABAQUS. Currently I have a model of a knee implant but I wish to implant a sensor/wire within the structure of the model as if it had been integrated during the casting process or such like. Would it be better to create...
  17. jonny17

    Time increment required is less than the minimum specified

    ahh what a silly mistake. Thanks a lot!
  18. jonny17

    Time increment required is less than the minimum specified

    here is the inp filehttp://files.engineering.com/getfile.aspx?folder=5a20ff42-057d-488f-b21e-bff20c911fb6&file=Descent.inp
  19. jonny17

    Time increment required is less than the minimum specified

    here is the filehttp://files.engineering.com/getfile.aspx?folder=de9fb854-4a05-4a6d-ae4e-cbf66774953a&file=UHMWPE2segmented.cae
  20. jonny17

    Time increment required is less than the minimum specified

    Hi, I am making a model of a knee implant. I have applied a 8000N pressure load to the tibial surface. After a while the analysis aborts and I get the error message Time increment required is less than the minimum specified This is the last part of the message file ***NOTE: THE RATE OF...

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