Large Deflections in numerical simulations

- July 23, 2018 at 10:37 pm
  
  guillermo.parraguez
  Subscriber
  
  Hello everyone:
  
  I want to ask you what are the considerations taken into account in numerical simulations when the "Large Deflections" option is set in "On". I'm modeling a steel moment connection and when I compare the hysteresis curves without and with "large deflections", I observe that there's small diferences between the maximum capacity of the connection but I'm not sure if I can continue my research keeping the "Large Deflection" in "Off" because I don't know what considerations this option adds to the numerical model.
  
  Thank you for your help!
- July 24, 2018 at 12:20 am
  
  Sandeep Medikonda
  Ansys Employee
  
  Hi Guillermo,
  
  Looks like you do have material non-linearities and it is always recommended to have Large deflection ON in these cases. How much of a deformation are you seeing in your model? Maybe it isn't large enough for you to see a difference? Check out the following resources that talk about this in detail:
  
  Resource 1
  
  Resource 2
  
  Regards,
  
  Sandeep

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