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Glossary

Neuber's Rule

Neuber's rule is used to convert an elastically computed stress or stain into the real stress or strain when plastic deformation occurs. For example, we may compute a stress with elastic assumptions at a notch to be K_tS and this stress exceeds the strength of the material. The real stress will be somewhere on the materials stress-strain curve at some point σ.

Neuber's rule states, with some mathematical proof, that the product of the elastic solution is equal to the product of the real elastic plastic solution. Mathematically this is expressed as

K_tS⋅K_te=σ⋅ε.