Single elliptical hole in a finite width plate. Theoretical stress concentration factors (Kt)calculator for tension and in-plane bending loads.
Note: Use dot "." as decimal separator.
Note 1: * Geometry rises σnom by a factor of Kt . (Kt = σmax/σnom)
Note 2: o σnom= P/[(1-2a/D)Dt] (Nominal tension stress at
the plate cross section due to tension load)
Note 3: + σnom = 12Ma/[t(D3-8a3)]
(Nominal tension stress)
Note 4: KtA = (σnom/σmax) Theoretical stress
concentration factor at point A in elastic range
Stress Concentration Factor:
Dimensional changes and discontinuities of a member in a loaded structure causes variations of stress and high stresses concentrate near these dimensional changes. This situation of high stresses near dimensional changes and discontinuities of a member (holes, sharp corners, cracks etc.) is called stress concentration. The ratio of peak stress near stress riser to average stress over the member is called stress concentration factor.
Kt: Theoretical stress
concentration factor in elastic range = (σmax/σnom)