Show simple item record

dc.contributor.authorSweeney, John
dc.contributor.authorSpencer, Paul E.
dc.contributor.authorThompson, Glen P.
dc.contributor.authorBarker, David
dc.contributor.authorCoates, Philip D.
dc.date.accessioned2022-03-23T14:01:57Z
dc.date.accessioned2022-03-30T09:56:40Z
dc.date.available2022-03-23T14:01:57Z
dc.date.available2022-03-30T09:56:40Z
dc.date.issued2021-08
dc.identifier.citationSweeney J, Spencer P, Thompson G et al (2021) Constitutive modelling of polylactic acid at large deformation using multiaxial strains. Polymers. 13(17): 2967.en_US
dc.identifier.urihttp://hdl.handle.net/10454/18827
dc.descriptionYesen_US
dc.description.abstractSheet specimens of a PLLA-based polymer have been extended at a temperature near to the glass transition in both uniaxial and planar tension, with stress relaxation observed for some time after reaching the final strain. Both axial and transverse stresses were recorded in the planar experiments. In all cases during loading, yielding at small strain was followed by a drop in true stress and then strain hardening. This was followed by stress relaxation at constant strain, during which stress dropped to reach an effectively constant level. Stresses were modelled as steady state and transient components. Steady-state components were identified with the long-term stress in stress relaxation and associated with an elastic component of the model. Transient stresses were modelled using Eyring mechanisms. The greater part of the stress during strain hardening was associated with dissipative Eyring processes. The model was successful in predicting stresses in both uniaxial and planar extension over a limited range of strain rate.en_US
dc.language.isoenen_US
dc.rights© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).en_US
dc.subjectPLAen_US
dc.subjectMultiaxialen_US
dc.subjectModellingen_US
dc.subjectEyringen_US
dc.titleConstitutive modelling of polylactic acid at large deformation using multiaxial strainsen_US
dc.status.refereedYesen_US
dc.date.Accepted2021-08-27
dc.date.application2021-08-31
dc.typeArticleen_US
dc.type.versionPublished versionen_US
dc.identifier.doihttps://doi.org/10.3390/polym13172967
dc.rights.licenseCC-BYen_US
dc.date.updated2022-03-23T14:02:00Z
refterms.dateFOA2022-03-30T10:00:08Z
dc.openaccess.statusopenAccessen_US


Item file(s)

Thumbnail
Name:
polymers-PLA_constit_13-02967- ...
Size:
7.573Mb
Format:
PDF
Description:
Sweeney_et_al_Polymers

This item appears in the following Collection(s)

Show simple item record