This work is focused on experimental and numerical analyses of a notched specimen under tension. The specimen is made of aluminum alloy AW5083 which exhibits a propagative instability phenomenon called Portevin Le-Chetelier (PLC) effect. The PLC effect occurs in metals like steel or aluminum alloys in certain strain rate and temperature ranges, see for example [1]. At the microscopic level it is linked to so-called Dynamic Strain Aging (DSA) which can occur when dislocations travel during plastic flow. They can be stopped by grid defects or solute atoms causing a pile up. After application of a sufficiently large force the dislocations are freed and the cycle repeats. At the macro level we can observe serrations in the force signal due to repetitive changes from hardening to softening, and associated bands of plastic strain rate moving through the sample. The experiments are simulated with a computational framework based on large-strain thermo-visco-plastic description with Estrin-McCormick (EMC) component which is a phenomenological representation of DSA [2]. The model is able to simulate both the stress jumps and traveling localized strain bands. A similar approach is employed in this work, neglecting the simulation of Lueders bands and using the Mandel stress tensor in the plasticity algorithm. The EMC model is usually examined using simple dogbone-shape samples under tension, see for instance [3]. In this paper, experiments on different specimen geometries are considered, two double-edge-notched and one single-edge-notched. The serrations in force-displacement diagrams and shear bands are clearly visible, in particular close to the notches. An extensive comparison with simulation results is performed. ACKNOWLEDGMENT: The work is supported within Weave-UNISONO call by the German Research Foundation (DFG grant 527828607) and by the National Science Center, Poland (NCN grant 2023/05/Y/ST8/00006). REFERENCES [1] A. Yilmaz. The Portevin-Le Chatelier effect: a review of experimental findings. Science and Technology of Advanced Materials, 12(6), 2011. [2] P.G. McCormick. Theory of flow localization due to dynamic strain aging. Acta Metallurgica, 36(12):3061–3067, 1988. [3] M. Mucha, L. Rose, B. Wcisło, A. Menzel, and J. Pamin. Experiments and numerical simulations of Lueders bands and Portevin-Le Chatelier effect in aluminium alloy AW5083,. Arch. Mech., 75(3):301–336, 2023.