How to find out the stifness of the model by using static structure?

Best Answer

Answers

  • peteroznewmanpeteroznewman Member
    edited December 2020

    @Tanziyang

    To define stiffness of a structure, you need a good definition of the fixed surface and the moving surface, and the direction you are moving that surface.

    It looks like you have a 2x2x2 cell cube.

    Hold the entire bottom face of the cube fixed, and apply -0.1 mm displacement on the entire top face of the cube. Insert a Reaction Force Probe on the Displacement. The stiffness of the 2x2 cell cube is the Force divided by 0.1 mm. It looks like a symmetric structure, so the stiffness in the X, Y and Z directions would all be equal. That takes care of the axial stiffness.

    If you want to know about shear stiffness, then you have to take the top face and apply a sideways force. Here is the definition of Shear Modulus. https://en.wikipedia.org/wiki/Shear_modulus

  • TanziyangTanziyang Member
    Accepted Answer
Sign In or Register to comment.