eprintid: 1937
rev_number: 7
eprint_status: archive
userid: 56
dir: disk0/00/00/19/37
datestamp: 2013-11-25 10:15:57
lastmod: 2014-10-09 09:20:26
status_changed: 2013-11-25 10:15:57
type: article
metadata_visibility: show
creators_name: Carpinteri, Alberto
creators_name: Paggi, Marco
creators_name: Zavarise, Giorgio
creators_id: 
creators_id: marco.paggi@imtlucca.it
creators_id: 
title: Snap-back instability in micro-structured composites and its connection with superplasticity
ispublished: pub
subjects: TJ
divisions: CSA
full_text_status: none
keywords: Fiber reinforced metal matrix composites, snap-back instability, superplasticity, interface debonding, finite element method 
abstract: Instability phenomena occurring in the microstructure of micro-structured composites are numerically investigated. To this aim, an interface constitutive law is proposed to describe both decohesion and contact at bi-material interfaces. These formulations are implemented in the FE code FEAP. Then, by applying dimensional analysis, the nondimensional parameters governing the macroscopic response of the composite are identified. According to this model, transverse debonding with respect to the fiber direction is simulated and the transition from snap-back instability in case of coarse fiber diameters, to a stable mechanical response for finer reinforcements is quantified. These results provide a possible quantitative explanation to the role played by the size of the reinforcement on the instability phenomena experimentally observed during superplastic deformation.
date: 2005
date_type: published
publication: Strength, Fracture and Complexity
volume: 3
number: 2-4
publisher: IOS Press
pagerange: 61-72
refereed: TRUE
issn: 1567-2069
official_url: http://iospress.metapress.com/link.asp?id=em2dtgcm82uhbab0
citation:   Carpinteri, Alberto and Paggi, Marco and Zavarise, Giorgio  Snap-back instability in micro-structured composites and its connection with superplasticity.  Strength, Fracture and Complexity, 3 (2-4).  pp. 61-72.  ISSN 1567-2069      (2005)