eprintid: 2072
rev_number: 11
eprint_status: archive
userid: 56
dir: disk0/00/00/20/72
datestamp: 2013-12-16 14:00:01
lastmod: 2014-10-09 09:20:24
status_changed: 2013-12-16 14:00:01
type: book_section
metadata_visibility: show
creators_name: Paggi, Marco
creators_name: Wriggers, Peter
creators_id: marco.paggi@imtlucca.it
creators_id: 
title: Stiffness and strength of hierarchical polycrystalline materials with imperfect interfaces
ispublished: pub
subjects: TJ
divisions: CSA
full_text_status: none
keywords: Hierarchical materials; Polycrystalline materials; Imperfect interfaces; Cohesive zone models; Finite element method
note: Volumen containing the full length papers accepted for presentation at the
XI International Conference on Computational Plasticity.
Fundamentals and Applications
Barcelona, Spain, 07-09 September 2011
abstract: In this paper, considering a cohesive zone model (CZM) for finite thickness
interfaces recently proposed by the authors, the stiffness of polycrystalline materials with
imperfect interfaces is characterized. Generalized expressions for the Voigt and Reuss
estimates of the effective elastic modulus of the composite are derived to interpret the
numerical results. Considering a polycrystalline material with a hierarchical microstructure,
the interaction between interfaces at the different hierarchical levels is numerically
investigated. A condition for scale separation, which suggests how to design the optimal
microstructure to maximize the material tensile strength is determined. An original interpretation
of this phenomenon based on the concept of flaw tolerance is finally proposed.
date: 2011
date_type: published
publisher: International center for numerical methods in engineering (CIMNE)
pagerange: 1082-1090
refereed: TRUE
isbn: 978-84-89925-73-1
book_title: Computational plasticity XI : fundamentals and applications
related_url_url: http://congress.cimne.com/complas2011/frontal/doc/Complas_11_ebook.pdf
related_url_type: pub
citation:   Paggi, Marco and Wriggers, Peter  Stiffness and strength of hierarchical polycrystalline materials with imperfect interfaces.   In:  Computational plasticity XI : fundamentals and applications.   International center for numerical methods in engineering (CIMNE), pp. 1082-1090.  ISBN 978-84-89925-73-1      (2011)