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  1. GeorgeEllwood

    UK supplier of glass fibre box section? Including metal tapped hole inserts?

    Hello, I was wondering if there is a UK supplier of glass fibre box section that includes metal tapped holes for attaching to? I've seen similar bespoke products using big head inserts that are added to the layup before curing. The off the shelf galss fibre box section I've seen doesn't have...
  2. GeorgeEllwood

    Workbench - Automate coordinate system creation using geometry parameters?

    Hello, I'm using workbench and would like to automate the creation of lots of coordinate systems based on geometry parameters. I've found a way to do it by creating planes in design modeller and then exporting them for use later but it's a very convoluted way to do it and is time consuming...
  3. GeorgeEllwood

    Rigid body slot question

    I've just had a thought, do I need to define a cylindrical coordinate system around the arm on the right hand side and then get the slot to use that coordinate system?
  4. GeorgeEllwood

    Rigid body slot question

    Hello, I've started using rigid body dynamics in ANSYS workbench. I'm working on a door mechanism that is opened by a pin in a slot mechanism. I've attached an image. The arm on the right hand side is a body-to-ground revolute, when it turns the pin should move in the slot and the door should...
  5. GeorgeEllwood

    Find time step where maximum occurs

    Hello, I'm working on a transient thermal analysis in workbench. If possible I'd like to automatically find the timestep where the maximum temperature occurs and then select this time step for some post processing. Is there an easy way or a command to do this/ I'm working on a snippet that will...
  6. GeorgeEllwood

    Control node number at line ends

    I think I've found out how to do it from creating the nodes and elements directly rather than using keypoints and lines. For the geometry that I'm using that should be suitable.
  7. GeorgeEllwood

    Control node number at line ends

    Hello, I've got a model that is made from beam elements. I've created it from keypoints and then lines. For the first line the nodes at either end are numbered 1 and 2, whereas the nodes in between are numbered 3....n. I'd rather the nodes were numbered 1,2,...n instead so that it will make...
  8. GeorgeEllwood

    Find neighbouring/nearest nodes APDL?

    Hi Drej, Thanks for the script, that should find all the nodes within a bounding box. I've found another command NNEAR(x), that will find the nearest node to node x, it only returns one node and I'm not sure how it decides which one when there are several nodes all the same distance apart from...
  9. GeorgeEllwood

    Find neighbouring/nearest nodes APDL?

    Hi Drej, I mean within a finite range of a node. From the way I am creating my mesh I know the number of the nodes that are part of the same element as a particular node. I'd like to automate the process of finding the nodes that are nearby but not part of the same element. Thanks George
  10. GeorgeEllwood

    Find neighbouring/nearest nodes APDL?

    Hello, I'm wondering if there is a way to find neighbouring or nearest nodes in APDL? I know I can use the NODE(x,y,z) command and that will find the nearest node to the point x,y,z. But I'm wondering if there is a different command that will tell me the numbers of the neighbouring nodes given...
  11. GeorgeEllwood

    Batch mode

    Hello, I was wondering if someone could advise on running ANSYS in batch mode on a 64bit windows PC. From the help file I've found I need to call the following commands in a command window: set ANSYS145_PRODUCT=ANE3FL set ANS_CONSEC=YES "C:\Program Files\Ansys Inc\V145\ANSYS\bin\winx64...
  12. GeorgeEllwood

    Parking brake for a shaft/motor/ball screw

    Hello, I'm working on something that will use a ball screw. I'd hoped to use a lead screw so it couldn't be back driven but this is proving very difficult. So I'm going back to plan A a ball screw but trying to find a brake to stop it being back driven. This would be be to fit on a shaft about...
  13. GeorgeEllwood

    Lead screw efficiency - static and dynamic forces

    Hi desertfox, That is what I would have thought about reflection of inertia. But I've found formulas in a text book and a manufacturers catalogue that do not take the efficiency into account with the reflected inertia. Thanks George
  14. GeorgeEllwood

    Lead screw efficiency - static and dynamic forces

    Thanks for the link. I couldn't find the answer there. The question I've got relates to the inertia of the load reflected onto the motor. Should this take into account the efficiency of the lead screw?
  15. GeorgeEllwood

    Lead screw efficiency - static and dynamic forces

    Hello, I've got a quick question about lead screw efficiencies. I've come across conflicting formulas to calculate the torque requirements for a load to be moved via a lead screw. The project I'm working on has low static and friction forces but high dynamic forces. This issue seems to be...
  16. GeorgeEllwood

    Parameterising stress linearisation results in APDL

    Thanks, the PAGET command doesn't seem to work with stress linearization results. I think it might be because the stress linearization is not mapping a single variable onto the path like a normal path operation. I'm trying to output the results to a text file and then selectively read in the...
  17. GeorgeEllwood

    Parameterising stress linearisation results in APDL

    Hello, I was wondering if there is a way to parameterise stress linearisation results in ANSYS APDL? This would be so that I could use an optimisation routine. So could I create a parameter PM into which I then place the maximum membrane stress from my stress classifaction line. I had thought...
  18. GeorgeEllwood

    Limit movement of a node

    Thanks Meshparts, I'd seen that the MPC184 elements could set stops or locks on movement. I'll have a think about how they could be implemented in my routine.
  19. GeorgeEllwood

    Limit movement of a node

    Hello, I'm wondering if it is possible to limit the movement of a node in ANSYS APDL? Without resorting to contact analysis or subroutines. I'm working on a problem where the component I'm will be displaced, in real life once it reaches a certain point it will come into contact with another...
  20. GeorgeEllwood

    Transfer temperature from a smaller thermal model to a larger structural model in workbench

    Hello, I'm wondering if anyone can help. I'd like to carry out a thermal model and then transfer the temperature result to a structural model in workbench. Normally when I do this I use the same geometry for both the thermal and structural model and transfer the temperatures in the normal way...

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