Analytical calculation model for unstiffened elements with nonlinear stress-strain relationships under uniform compression
|Issue:||"Steel Construction", March 2009, n. 1 v. 2|
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|