Curved beam stress calculation problem

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SUMMARY

The discussion revolves around the significant discrepancy between hand calculations and Finite Element Analysis (FEA) results for stress in curved beams. Participants reported hand-calculated stress values of 9.5 MPa and 12 MPa, while FEA results using ANSYS indicated stress levels exceeding 400 MPa and 500 MPa, respectively. The formula used for calculations is Stress = (M*(r-rn))/(Aer), which is widely referenced in engineering literature. The participants express confusion over the consistent divergence between manual calculations and FEA outcomes.

PREREQUISITES
  • Understanding of curved beam theory
  • Proficiency in using ANSYS for FEA
  • Familiarity with stress calculation formulas
  • Knowledge of engineering mechanics principles
NEXT STEPS
  • Research the assumptions and limitations of curved beam stress calculations
  • Explore advanced FEA techniques in ANSYS for curved beams
  • Study the impact of boundary conditions on FEA results
  • Learn about the differences between analytical and numerical methods in structural analysis
USEFUL FOR

Mechanical engineers, structural analysts, and students engaged in stress analysis of curved beams will benefit from this discussion, particularly those comparing manual calculations with FEA results.

Aerstz
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Homework Statement



Calculate stress in a curved beam and compare with FEA model.

Homework Equations



Stress = (M*(r-rn))/(Aer)

The Attempt at a Solution



I used the above formula, which is repeated in many textbooks and reputable engineering websites, to calculate stress in a curved beam. My result was 9.5 MPa, but the FEA result was over 500 MPa (see attached image).

I've checked my calculations and I'm convinced I haven't made a mistake. I really do not know why there is such a large disagreement between my calculations and the FEA result. I have repeated the FEA process several times and in different ways but the disagreement is constant.

If anyone knows what is going wrong here please tell me!
 

Attachments

  • curved beam.jpg
    curved beam.jpg
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Hello Aertsz

I have a same problem with you.İn Curved Beams there is something I can not achieve.My Hand Calculation is 12 MPA My Ansys result is 400 MPA.If you found the reason or solution please share me?

My email: tehc21@gmail.com
 
This is an old thread . Best to start a fresh one .

Please post full information about the problem in the new thread and show us your attempt at calculations .
 
nb : Showing Email addresses openly on forum is not advisable . Delete yours asap .
 

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