%0 Book Section
%A Carpinteri, Alberto
%A Paggi, Marco
%B Atti del 17° Convegno Nazionale del Gruppo Italiano Frattura (IGF)
%D 2004
%F eprints:1922
%I Gruppo Italiano Frattura
%P 136-141
%T Theoretical and numerical investigation on internal instability phenomena in composite materials
%U http://eprints.imtlucca.it/1922/
%X Instability phenomena occurring in the microstructure of composite materials are investigated. To this aim, a  complete description of the mechanical behavior of bi-material interfaces in composite materials requires the  definition of both a cohesive law involving damage for the debonding stage, and a contact model during the  closure of the interface. Both formulations are herein presented and implemented in the FE code FEAP.  Numerical examples showing the transition from a snap-back instability to a stable mechanical response are  presented.
%Z 17° Convegno Nazionale del Gruppo Italiano Frattura IGF17, Bologna, Italy, June 16-18, 2004