Load Factors for Buckling Analysis

- November 10, 2023 at 11:15 am
  Muhammad Zeeshan
  Subscriber
  Hi there!
  Can anyone guide me with the following query & attached picture.
  
  I've developed 3 different types of I beams.
  1. Simple Beam of 200 x 80 x 5 x 2 with simply supported boundary conditions & a point load applied.
  2. Same beam with web having circular holes (100mm dia) @ 100mm c/c & both ends @50mm from first & last hole.
  3. Same beam with web having circular holes (100mm dia) @ 200mm c/c & both ends again @50mm from first & last hole.
  Now, when i'm solving it for buckling. The beam with no holes is having the least load factor while no.2 beam is having the largest load factors which i assume should be the opposite of it. Can anybody guide what's going wrong? I've kept everything constant (Boundary Conditions, Length of beam, Applied Load). Thanks.
- November 10, 2023 at 10:41 pm
  
  peteroznewman
  Bbp_participant
  
  What was the default element size in each case? Maybe the beams with holes ended up with smaller elements.
- November 11, 2023 at 11:39 pm
  
  Muhammad Zeeshan
  Subscriber
  
  Hi peter!
  The element size was set to 50mm for all 3 conditions.
- November 12, 2023 at 12:09 pm
  
  peteroznewman
  Bbp_participant
  
  Remesh with 10mm element size to see if the results shift from the 50mm element size values.
- November 12, 2023 at 4:36 pm
  
  Muhammad Zeeshan
  Subscriber
  
  Alright, Peter. I'll do.
  
  Can I request you to check my other query as well please?