Analytical calculation model for unstiffened elements with nonlinear stress-strain relationships under uniform compression

Author(s):	P. Niederegger Markus Knobloch Mario Fontana
Medium:	journal article
Language(s):
Issue:	"Steel Construction", March 2009, n. 1 v. 2
Page(s):	42-49
DOI:	10.1002/stco.200910007
Abstract:	This paper presents an improved analytical calculation model for unstiffened elements with nonlinear stress-strain relationships (e.g. aluminium and stainless steel) subjected to uniform in-plane compression. The model takes material nonlinearity into account by means of the Ramberg-Osgood constitutive law. It is based on the results of a numerical parametric study of the load-carrying behaviour of unstiffened elements. A comparative study shows good agreement between test results and analytically determined strengths according to the new calculation model.
Keywords:	unstiffened elements, nonlinear stress-strain relationship, aluminum, stainless steel, analytical model
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