eprintid: 3813
rev_number: 7
eprint_status: archive
userid: 84
dir: disk0/00/00/38/13
datestamp: 2017-09-28 15:29:25
lastmod: 2017-09-28 15:29:25
status_changed: 2017-09-28 15:29:25
type: conference_item
metadata_visibility: show
creators_name: Carollo, Valerio
creators_name: Borri, Claudia
creators_name: Paggi, Marco
creators_id: valerio.carollo@imtlucca.it
creators_id: claudia.borri@imtlucca.it
creators_id: marco.paggi@imtlucca.it
title: A two-scale constitutive parameters identification procedure for elasto-plastic fracture
ispublished: pub
subjects: TA
divisions: CSA
full_text_status: none
pres_type: paper
abstract: Constitutive parameters identification for elasto-plastic fracture is a complex problem due to the interplay between two forms of material nonlinearity, viz. plasticity and cohesive fracture. In the present study we examine this problem in relation to Copper specimens covered by Silver used in photovoltaic modules as electrical conductors. Uniaxial tensile tests on un-notched and notched specimens are performed with a tensile stage inside a scanning electron microscope, monitoring crack growth for each imposed far-field displacement. Parameters identification is then performed by considering an elasto-plastic constitutive relation with isotropic hardening for the continuum and a polynomial cohesive zone model (CZM) with two free parameters. For a better numerical-experimental fitting, a four-parameter CZM should be used to independently control the CZM stiffness and the fracture energy. To do so effectively, a constrained optimization procedure with a two-scale objective function is outlined.
date: 2015
date_type: published
publication: COMPLAS XIII : proceedings of the XIII International Conference on Computational Plasticity : fundamentals and applications
publisher: CIMNE
pagerange: 922-931
event_title: XIII International Conference on Computational Plasticity: fundamentals and applications (COMPLAS 2015)
event_location: Barcelona, Spain
event_dates: September 1-3, 2015
event_type: conference
refereed: TRUE
isbn: 978-84-944244-6-5
book_title: Proceedings of the XIII International Conference on Computational Plasticity: fundamentals and applications (COMPLAS 2015)
official_url: http://hdl.handle.net/2117/81381
citation:   Carollo, Valerio and Borri, Claudia and Paggi, Marco  A two-scale constitutive parameters identification procedure for elasto-plastic fracture.  In: XIII International Conference on Computational Plasticity: fundamentals and applications (COMPLAS 2015), September 1-3, 2015, Barcelona, Spain pp. 922-931.  ISBN 978-84-944244-6-5.      (2015)