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The effect of geometry on tensile strength of biodegradable polylactic-acid tensile-test specimens by material extrusion

journal contribution
posted on 03.02.2020 by Alper Ekinci, Andrew Johnson, Andy Gleadall, Xiaoxiao Han
Additive manufactured biomedical devices have been widely used in the biomedical fields due to the development of biomaterials and manufacturing techniques. Biodegradable Polylactic Acid-based polymers are the most common material that can be manufactured using material extrusion, one of the most widely known additive manufacturing methods. However, medical grade polymers are too expensive for degradation studies with common tensile specimens. Therefore, this paper aims to reduce the volume of the material used for manufacturing tensile specimens by introducing a new micro-X tensile specimen developed for steel. The tensile strength of micro-X tensile specimens were compared with the ASTM D1708 standard tensile specimens. Experimental results and statistical analysis showed that there was no significant difference in terms of Tensile Strength. Furthermore, the micro-X tensile specimen reduced the volume and as well as the cost to 1% in comparison to ASTM D638 type V standard tensile specimens.

History

School

  • Design
  • Mechanical, Electrical and Manufacturing Engineering

Published in

International Journal of Rapid Manufacturing

Publisher

Inderscience

Version

AM (Accepted Manuscript)

Publisher statement

This paper was accepted for publication in the journal International Journal of Rapid Manufacturing and the definitive published version is available at

Acceptance date

27/01/2020

Publication date

2020-05-31

Notes

This paper is a revised and expanded version of a paper entitled ‘The Effect of Geometry on Mechanical Properties of Biodegradable Polylactic-Acid TensileTest Specimens by Material Extrusion’, presented at 16th Conference on Rapid Design, Prototyping & Manufacturing (RDPM2019), Brunel University London, Uxbridge, 4th – 5th April 2019. It is available on the Repository here https://hdl.handle.net/2134/37371

ISSN

1757-8817

eISSN

1757-8825

Language

en

Depositor

Dr Andrew Johnson . Deposit date: 3 February 2020

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