Stress Concentration Factor Calculation For a Rectangular Hole

[FEAMonkey]

Hi Everyone,

I have set up an FEA simulation in ANSYS for the following specimen. The left side of the plate is fixed and two points force applied on the right side of the plate (negative Z direction).

I have calculated the bending stress at the location of interest using this formula:

How can I estimate the stress concentration factor for a plate with a rectangular hole on it?

Thank you for your help.

 

[WARose]

Looking in Roark's Formulas for Stress and Strain (6th ed.), I don't see an exact match for your situation.....but some pretty close approximations.

If you are trying to verify a FEA solution.....use a fine enough mesh, and it will probably get pretty close to the hand solution.

 

[rb1957]

ohh … out of plane bending. I'd suggest Petersen "stress concentration factors".

if you have to do FEA … plan on almost microscopic sized elements. Maybe 10 through the thickness, and cube bricks, with a mesh transition away from the local stress field. Else TET10s.

i'd also try more typical text book solutions first (like a round hole).

Use the nodal stress at the surface of the cut-out.

another day in paradise, or is paradise one day closer ?