General Mechanical

General Mechanical

Comparing Solid element and Shell element – WB

    • thanhttdt
      Subscriber

      Hi everyone, 


      When I did an analysis for 2 cases: solid element and shell element in Workbench, I saw that the von Mises in 2 cases are much different


      235 Mpa and 68 Mpa respectively. 



      Figure 1: Solid element, VM stress 235 Mpa



      Figure 2: Shell element, von Mises stress 68 Mpa


      Could anyone take a look and send me any explanation?


      Link file: https://drive.google.com/drive/folders/1m5rmXKPJWJT7zMBKs1TlCb9qXxPo6JJX?usp=sharing


      Thanks in advance,


       

    • thanhttdt
      Subscriber

      Could anyone see and give me any suggestions?


      Many thanks,

    • peteroznewman
      Subscriber

      Hello Thanhttdt,


      You have applied different loads to the two models.


      On the Solid Model, you have a bearing load, which takes the force and applies it to the nodes only on the side of the face that a pin in the hole would push on, and with the force scaled as a cosine function with 1 on the centerline ramping down to 0 at the 90 degree point of the face.


      On the Shell Model, you have a force load, which takes the force and divides it equally to all nodes around the circle.


      Try putting a force load on the solid model and it will be closer. However, the bearing load is a more realistic load for your case.


      Regards,


      Peter.

    • thanhttdt
      Subscriber

      Hi Peteroznewman,


      Thanks for your suggestion, 


      I try to use bearing load in shell element model but cannot.


      Could you suggest me to apply bearing in this case?


      Thanks in advance

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