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Experimental and Numerical Evaluation of Residual Displacement and Ductility in Ratcheting and Shakedown of an Aluminum Beam

Department of engineering, University of Campania “Luigi Vanvitelli”, CE 81031 Aversa, Italy
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Appl. Sci. 2020, 10(10), 3610; https://doi.org/10.3390/app10103610
Received: 2 April 2020 / Revised: 18 May 2020 / Accepted: 21 May 2020 / Published: 22 May 2020
Safety assessment of structures can be obtained employing limit design to overcome uncertainties concerning actual response due to inelastic constitutive behavior and more generally to non-linear structural response and loads’ random variability. The limit analysis is used for evaluating the safety of the structures, starting directly from load level without any knowledge of the load history. In the paper, the lower bound calculation is proposed where a new strain-based approach is used that allowed describing the residual stress and displacement in terms of permanent strain. The strategy uses the permanent strain as effective parameters of the procedure so that it is possible to assess the ductility requirements for the complete load program developed till collapse or shakedown. The procedure is compared to experimental results obtained on aluminum beams in shakedown. View Full-Text
Keywords: shakedown; plasticity; limit design; ratcheting; experimental comparison; residual displacement; ductility assessment shakedown; plasticity; limit design; ratcheting; experimental comparison; residual displacement; ductility assessment
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Palladino, S.; Esposito, L.; Ferla, P.; Totaro, E.; Zona, R.; Minutolo, V. Experimental and Numerical Evaluation of Residual Displacement and Ductility in Ratcheting and Shakedown of an Aluminum Beam. Appl. Sci. 2020, 10, 3610.

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