Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations MintJulep on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. PaulMcNulty

    Using springs to measure twisting of foundations

    I am currently running the axial connectors I had before, but going for the non-linear option. I am only putting in one line in the data so its actually behaving linearly (I just put in a force and displacement). I tried changing the D11 value in the linear model but it didnt seem to make any...
  2. PaulMcNulty

    Using springs to measure twisting of foundations

    Well I have put the axial connectors in the two directions that I want the foundation to twist (see the screenshot attached). I am still a bit confused about the D11 value. It is a stiffness value yes? Is 1 a very low value or not?https://dl.dropboxusercontent.com/u/25273489/screenshot.jpg
  3. PaulMcNulty

    Using springs to measure twisting of foundations

    I have attached a screenshot of the connector section that I have developed. I think I have to put in a D11 value that represents the elastic stiffness. I have run this model but even for a very low stiffness value, the foundation did not move much, which makes me think something is not correct...
  4. PaulMcNulty

    Using springs to measure twisting of foundations

    Hi, Yeah I have tried to use the connectors now, they seem much easier. However, it asks me for a D value, when I choose elastic behaviour for the connector. I have checked through the manual, but I dont know what D is. I was expecting a stiffness (E) value instead. Do you know anything about this?
  5. PaulMcNulty

    Using springs to measure twisting of foundations

    hi, I am trying to model how a 3D foundation for a bridge twists under loading. It is prevented from displacing in the vertical direction, but can twist in the other direction. I initially tried to put 4 springs in at the four corners of the end face of the foundation. In this way, one end of...
  6. PaulMcNulty

    Pressure dependent boundary condition in Abaqus

    I have an idea; could I place a thin infinitally stiff rectangle wall against my granular material, and then apply springs to the four corners of the wall. That way the entire wall would move evenly backwards with the force, right?
  7. PaulMcNulty

    Pressure dependent boundary condition in Abaqus

    I have learned how to use springs, seems pretty simple, I have a problem though. I want to put the spring onto a granular material, but I can only apply the spring to nodes and not the entire surface. So lets say my granular material was a rectangle, if I was to apply springs to the four nodes...
  8. PaulMcNulty

    Pressure dependent boundary condition in Abaqus

    Well I have spent the last few hours trying to learn the user subroutine; I think I have to use VUAMP as im running an explicit analysis. Your right though, this is not easy, so im going to try and use a spring instead!
  9. PaulMcNulty

    Pressure dependent boundary condition in Abaqus

    Thank you, I will look into that.
  10. PaulMcNulty

    Pressure dependent boundary condition in Abaqus

    Hi, Thanks for your reply. I am modelling an arch bridge. I want to see the effect of allowing the supports of the arch under vertical loading to move slightly as the horizontal pressure increases. So I don't think I can do what you are suggesting. Paul
  11. PaulMcNulty

    Pressure dependent boundary condition in Abaqus

    hi, I want to create a bondary condition in Abaqus that moves a certain distance depending on the pressure applied, anyone know how to do this? I am only able to set up a completely rigid boundary condition at the moment. Thanks for any help! Paul

Part and Inventory Search

Back
Top