Publication:
Temperature and strain rate dependences on hardening and softening behaviours in semi-crystalline polymers: Application to PEEK

dc.affiliation.dptoUC3M. Departamento de Mecánica de Medios Continuos y Teoría de Estructurases
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Dinámica y Fractura de Elementos Estructuraleses
dc.contributor.authorBarba, D.
dc.contributor.authorArias Hernández, Ángel
dc.contributor.authorGarcía González, Daniel
dc.contributor.funderComunidad de Madrides
dc.contributor.funderMinisterio de Ciencia, Innovación y Universidades (España)es
dc.date.accessioned2021-05-06T07:58:49Z
dc.date.available2022-01-01T00:00:04Z
dc.date.issued2020-01
dc.description.abstractSemi-crystalline polymers often present a complex non-linear behaviour that combines thermo-viscoelastic and thermo-viscoplastic contributions associated to different deformation mechanisms. During the initial deformation stages, the process is influenced by the rupture and reorientation of crystalline phases while, during the final deformation stages, the process is mainly governed by the mobility and orientation of the amorphous molecular chains. Moreover, the level of reorientation of crystalline and amorphous phases is strongly affected by variables such as temperature and strain rate. This work focusses on the role of such mechanisms in the mechanical behaviour of polyether-ether-ketone (PEEK) within its different thermal-behaviour regions: initial glassy region, glass transition and final rubbery region. To this end, samples of PEEK are subjected to large deformations under uniaxial tension at temperatures from 20 to 240 °C, and strain rates from 0.0001 to 0.1s^-1 (covering both isothermal and adiabatic conditions). In addition, a constitutive model is proposed to complementarily explain the experimental observations by means of entropic strain hardening due to reorientation of polymer chains influenced by thermo-viscoelastic effects, as well as thermo-viscoplastic behaviours defining the material yielding by means of crystallites deformation and breaking. These results provide new insights into the deformation mechanisms of semi-crystalline polymers below and above glass transition, which are significantly relevant for thermoforming processes of biomedical prosthesis.en
dc.format.extent13
dc.identifier.bibliographicCitationBarba, D., Arias, A. & Garcia-Gonzalez, D. (2020). Temperature and strain rate dependences on hardening and softening behaviours in semi-crystalline polymers: Application to PEEK. International Journal of Solids and Structures, vol. 182-183, pp. 205–217.en
dc.identifier.doihttps://doi.org/10.1016/j.ijsolstr.2019.08.021
dc.identifier.issn0020-7683
dc.identifier.publicationfirstpage205
dc.identifier.publicationlastpage217
dc.identifier.publicationtitleInternational Journal of Solids and Structuresen
dc.identifier.publicationvolume182-183
dc.identifier.urihttps://hdl.handle.net/10016/32541
dc.identifier.uxxiAR/0000025514
dc.language.isoeng
dc.publisherElsevieren
dc.relation.projectIDGobierno de España. RTI2018-094318-B-I00es
dc.relation.projectIDComunidad de Madrid. 2018-T2/IND-9992es
dc.rights© 2019 Elsevier Ltd.en
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.rights.accessRightsopen access
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/*
dc.subject.ecienciaMaterialeses
dc.subject.otherConstitutive modelen
dc.subject.otherNeckingen
dc.subject.otherPEEKen
dc.subject.otherPolymer chains reorientationen
dc.subject.otherSemi-crystalline polymersen
dc.titleTemperature and strain rate dependences on hardening and softening behaviours in semi-crystalline polymers: Application to PEEKen
dc.typeresearch article*
dc.type.hasVersionAM*
dspace.entity.typePublication
Files
Original bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
Temperature_IJSS_2020_ps.pdf
Size:
26.09 MB
Format:
Adobe Portable Document Format