8th International Conference on Mehanical and Physical Behaviour of Materials under Dynamic Loading
J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 147-155
DOI: 10.1051/jp4:2006134023
Improved predictive modelling of strain Localisation and ductile fracture in a Ti-6Al-4V alloy subjected to impact loading
N. Petrinic, J.L. Curiel Sosa, C.R. Siviour and B.C.F. ElliottDepartment of Engineering Science, University of Oxford, Oxford, UK
(Published online 26 July 2006)
Abstract
This paper addresses experimental and numerical modelling
aspects of material characterisation process concerning strain localisation
and ductile fracture preceding the design of aerospace structures threatened
by impact. A holistic approach to predictive modelling of the observed
phenomena is presented by outlining the results of uniaxial tensile and
compressive testing at different rates of strain. The data obtained from
experiments have been used to aid the development of physically based
constitutive models capable of predicting the observed strain rate dependent
behaviour including the competing volumetric and deviatoric damage
mechanisms resulting in different macroscopic modes of ductile fracture of
the material under consideration. Inverse modelling has been employed to
identify non-measurable constitutive parameters of the proposed numerical
model.
© EDP Sciences 2006