Constitutive modelling of nonlinear viscoelastic behaviour for Poly (L-Lactic Acid) above glass transition

Huidong Wei, Gary Menary, Fraser Buchanan, Shiyong Yan

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Poly (L-Lactic Acid) (PLLA) has excellent bioresorbable properties and applied in manufacturing Bioresorbable Vascular Scaffold (BVS). In order to improve the mechanical performance of PLLA BVS, biaxial orientation via stretch blow moulding process has been introduced to present products with thinner but stronger struts. In order to better understand this deformation process above the glass transition, the mechanical behaviour of amorphous PLLA materials was obtained by biaxial stretch testing under displacement controlled conditions. The Glass-Rubber (GR) constitutive model was adopted to simulate its nonlinear viscoelastic behaviour and showed its ability for the simulation of blow forming process.
Original languageEnglish
Title of host publicationConstitutive Models for Rubber X
Subtitle of host publicationProceedings of the European Conference on Constitutive Models for Rubbers X (Munich, Germany, 28-31 August 2017)
EditorsAlexander Lion, Michael Johlitz
Place of PublicationLondon
PublisherCRC Press
Number of pages6
ISBN (Electronic)9781315223278
ISBN (Print)9781138030015
Publication statusPublished - 1 Aug 2017
Externally publishedYes
EventEuropean Conference on Constitutive Models for Rubbers X - Munich, Germany
Duration: 28 Aug 201731 Aug 2017
Conference number: 10


ConferenceEuropean Conference on Constitutive Models for Rubbers X

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