The objective of the work was to estimate the elasto-plastic stress and strain behaviour at the root of the notch of an Al 6061 plate undergoing tensile and compressive cyclic loading by both experimental and numerical methods. This attempt to measured initial elasto-plastic stresses experimentally then verified by numerically. The various Kt values such as 2, 4 and 6 specimens were subjected to tensile test using a computerised universal testing machine. Numerical approach associated with body discretization and developed finite element model with sufficient degree of freedom to analyses elasto-plastic analysis of notched specimen. Experimental results show that analysis of three Kt notched specimens had similar behaviour of elasto-plastic behaviour but different magnitude. The experimental results compare well with the numerical results which are obtained during finite element analysis of notched specimens
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