@incollection{eprints1922,
          author = {Alberto Carpinteri and Marco Paggi},
           pages = {136--141},
            note = {17? Convegno Nazionale del Gruppo Italiano Frattura IGF17, Bologna, Italy, June 16-18, 2004},
       publisher = {Gruppo Italiano Frattura},
            year = {2004},
       booktitle = {Atti del 17? Convegno Nazionale del Gruppo Italiano Frattura (IGF)},
           title = {Theoretical and numerical investigation on internal instability phenomena in composite materials},
             url = {http://eprints.imtlucca.it/1922/},
        abstract = {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.}
}