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

Applied Sciences

Luca Esposito¹  Elena Totaro¹  Vincenzo Minutolo¹  Paolo Ferla¹  Simone Palladino¹  Renato Zona¹ 

[1] Department of Engineering, University of Campania “Luigi Vanvitelli”, 81031 Aversa, Italy;

关键词: shakedown;    plasticity;    limit design;    ratcheting;    experimental comparison;    residual displacement;   

DOI  :  10.3390/app10103610

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown