Experiment and Modelling on Biaxial Deformation of PLLA Materials Under Designed Strain History for Stretch Blow Moulding

Huidong Wei, Gary Menary, Shiyong Yan, Fraser Buchanan

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

Abstract

Stretch blow moulding in manufacturing bioresorbable vascular scaffold (BVS) from poly (l-lactic acid) (PLLA) provides a biaxial deformation process of raw materials to enhance the mechanical performance. Current knowledge on the mechanical behaviour of PLLA materials in this deformation process is still lacked and trial-and-error tests are relied to develop a successful operation, causing significant waste of material and cost. Motivated by this circumstance, mechanical properties of PLLA materials were investigated by biaxial stretching test at designed strain history mimicking the stretch blow moulding process. A nonlinear viscoelastic material model, i.e. Glass-rubber model was calibrated based on the experimental data from equal biaxial (EB) and constant-width (CW) stretching tests. Material anisotropy was implemented into the original model by introducing the initial orientation factor from the extrusion process. Biaxial deformation process of PLLA materials under variable strain history was modelled by the calibrated and modified model. Modelling results exhibited good agreement with the experimental data, highlighting the potential application of material modelling in improving the understanding on stretch blow moulding of PLLA materials in the industrial manufacture.
Original languageEnglish
Title of host publicationRecent Advances in Intelligent Manufacturing
Subtitle of host publicationFirst International Conference on Intelligent Manufacturing and Internet of Things and 5th International Conference on Computing for Sustainable Energy and Environment, IMIOT and ICSEE 2018, Chongqing, China, September 21-23, 2018, Proceedings, Part I
EditorsShilong Wang, Mark Price, Ming K. Lim, Yan Jin, Yuanxin Luo, Rui Chen
PublisherSpringer Singapore
Pages228-238
Number of pages11
Volume923
Edition1st
ISBN (Electronic)9789811323966
ISBN (Print)9789811323959
DOIs
Publication statusPublished - 5 Sep 2018
Externally publishedYes
Event1st International Conference on Intelligent Manufacturing and Internet of Things and 5th International Conference on Computing for Sustainable Energy and Environment - Chongqing, China
Duration: 21 Sep 201823 Sep 2018

Publication series

NameCommunications in Computer and Information Science
PublisherSpringer
Volume923
ISSN (Print)1865-0929
ISSN (Electronic)1865-0937

Conference

Conference1st International Conference on Intelligent Manufacturing and Internet of Things and 5th International Conference on Computing for Sustainable Energy and Environment
Abbreviated titleIMIOT and ICSEE 2018
Country/TerritoryChina
CityChongqing
Period21/09/1823/09/18

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