General Mechanical

General Mechanical

Eigenbuckling Analysis

    • Fatih 1122
      Subscriber

      Hi,

       

      How is the axial stiffness and bending stiffness calculated in a buckling analysis?

       

      Is there a tool that calculates these?

       

      How do I calculate the strength according to the Load Multiplier results?

    • Erik Kostson
      Ansys Employee

       

      Hi
       
      See if the courses help answer some of your questions:
      https://courses.ansys.com/index.php/courses/linear-column-buckling/
      https://courses.ansys.com/index.php/courses/structural-instabilities/lessons/buckling-lesson-3/
       
      As for the stiffness, say for a beam element in FE, the Axial stiffness term in the element stiffness matrix is (E*A_cross_section)/Length_element, and similar for bending stiffness and so on – Ansys will than assemble a global stiffness matrix by adding the contributions from all these element stiffnesses. See a book on FEA theory, the EDX Cornell University free FEA course, and or the ansys help manual for more info.

       

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