7 Replies Latest reply on Jul 24, 2015 10:40 AM by Stephen White

Difference in Simulation result

Fahmi Ahmad Jul 22, 2015 10:53 PM

Hi All,

Good day to you.

I am currently working on a flatbed chassis design. I want to determine the maximum stress in the beam under desired loading condition.

I've run the simulation two times, exactly the same properties, and it give two different result. Could anyone care to help me on this?

Thanks in advance.

Regards,

AFK

Re: Difference in Simulation result

James Riddell Jul 23, 2015 7:38 AM (in response to Fahmi Ahmad)

Have you got some screen shots of how you set each up and what the results were?
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- Re: Difference in Simulation result
  
  Fahmi Ahmad Jul 23, 2015 7:53 AM (in response to James Riddell)
  
  Attached the related image. beam web was 4mm thick, top and bottom flange are 10mm thick with 180 width. material tensile strength is 750MPa while yield strength is 700MPa. Elastic modulus is 205GPa. Load per item is 294300N and the fixture is at the highlighted blue area in picture above.
  
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  - Re: Difference in Simulation result
    
    Fahmi Ahmad Jul 23, 2015 7:53 AM (in response to Fahmi Ahmad)
    
    oh almost forgot, the first run give max stress about 625MPa while second run give 1250MPa.
    
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    - Re: Difference in Simulation result
      
      James Riddell Jul 23, 2015 10:20 AM (in response to Fahmi Ahmad)
      
      Can you screenshot the loads and constraints for each case? Did the mesh change?
      
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    - Re: Difference in Simulation result
      
      Stephen White Jul 24, 2015 10:40 AM (in response to Fahmi Ahmad)
      
      Hi Fahmi,
      
      It seems strange that the stress has exactly doubled... Did anything change between the runs, materials, loads etc.?
      
      Would be good to get the actual files as it is likely just a set-up problem rather than a solver problem.
      
      Cheers
      
      Steve
      
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Re: Difference in Simulation result

J. Mather Jul 23, 2015 7:46 AM (in response to Fahmi Ahmad)

..or better yet - the actual data set.
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