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.

Stress concentration factors calculators
have been developed to calculate theoretical stress
concentration factors(K_{t}) in
elastic range for
different type of stress raisers and loading conditions. The calculator
calculates theoretical stress concentration factors for loading types of tension,
bending and torsion.