Ribeiro, J. ; Santiago, A. ; Rigueiro, C. Régua (2014) - Material modelling of tensile steel component under impulsive loading. In Portuguese Conference on Fracture, 14, Régua, 6-7 de fevereiro. Vila Real: UTAD. p. 1-8
Title
Material modelling of tensile steel component under impulsive loading
Subject
Material characterization Numerical modelling Elevated strain rate Fracture Ductile damage
Date
2015-03-31T11:41:53Z 2015-03-31T11:41:53Z 2014
Description
The “T-stub” model is used in Eurocode 3 – part 1.8 as part of the “component method” for the representation of steel connection’s tension zone and is usually responsible for providing ductility to the connection. Looking forward to establish the “T-stub’s” maximum displacement capacity, fracture simulation of steel elements is here explored following “element deletion” technique for a given level of ductile damage. Material softening and triaxial stress state dependency are assessed based on finite element analysis of common uniaxial tension tests. Numerical model describing the “T-stub” behaviour and displacement capacity are compared against experimental tests of statically loaded “T-stub” specimens with thicknesses of 10 and 15 mm.
Based on the calibrated FE model for monotonic loading, the behaviour of this tensile component is evaluated for impulsive loading regimes. The material behaviour is improved to take into account the possible development of elevated strain rates based on results from Split-Hopkinson Bar tests, through the incorporation of the Johnson-Cook’s elevated strain rate law for material strain-hardening description.
