General Mechanical

General Mechanical

rigid body vs flexible body in a structural static analysis

    • busraekinci
      Subscriber
      Hello, nI have a machine arm mechanism with a bucket on it's end point. When I define all bodies as flexible, my joint force results do not match with my hand calculation. The results are less than my hand calculation result by almost 20% difference ratio. I know that I can only get accurate results when I turn the bodies into rigid bodies. Even so, isn't the difference is so high for flexible bodies? Is there anyone can explain this situation and it's principle?Thanks!!!nn
    • peteroznewman
      Subscriber
      nPlease reply with a specific example of your hand calculation, the results from a model with flexible bodies and the results from a model with rigid bodies. Archive the model and put the .wbpz file in a zip file to attach to your reply.n
    • Kai
      Ansys Employee
      Hi, flexible body means the body itself can deform. If your hand calculation is based on the assumption that all bodies are rigid, it's not a surprise to see a result discrepancy n
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