eprintid: 2803
rev_number: 8
eprint_status: archive
userid: 69
dir: disk0/00/00/28/03
datestamp: 2015-11-02 14:43:10
lastmod: 2015-11-02 14:43:10
status_changed: 2015-11-02 14:43:10
type: article
metadata_visibility: show
creators_name: Paggi, Marco
creators_name: Sapora, Alberto
creators_id: marco.paggi@imtlucca.it
creators_id: 
title: An Accurate Thermoviscoelastic Rheological Model for Ethylene Vinyl Acetate Based on Fractional Calculus
ispublished: pub
subjects: T1
subjects: TH
divisions: CSA
full_text_status: public
abstract: The thermoviscoelastic rheological properties of ethylene vinyl acetate (EVA) used to embed solar cells have to be accurately described to assess the deformation and the stress state of photovoltaic (PV) modules and their durability. In the present work, considering the stress as dependent on a noninteger derivative of the strain, a two-parameter model is proposed to approximate the power-law relation between the relaxation modulus and time for a given temperature level. Experimental validation with EVA uniaxial relaxation data at different constant temperatures proves the great advantage of the proposed approach over classical rheological models based on exponential solutions.
date: 2015
date_type: published
publication: International Journal of Photoenergy
volume: 2015
number: 252740
publisher: Hindawi Publishing Corporation
id_number: 10.1155/2015/252740
refereed: TRUE
issn: 1687-529X
official_url: http://www.hindawi.com/journals/ijp/2015/252740/abs/
citation:   Paggi, Marco and Sapora, Alberto  An Accurate Thermoviscoelastic Rheological Model for Ethylene Vinyl Acetate Based on Fractional Calculus.  International Journal of Photoenergy, 2015 (252740).   ISSN 1687-529X      (2015)  
document_url: http://eprints.imtlucca.it/2803/1/paggi.pdf