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Download fileThe effect of geometry on tensile strength of biodegradable polylactic-acid tensile-test specimens by material extrusion
journal contribution
posted on 2022-01-10, 09:50 authored by Alper Ekinci, Andrew JohnsonAndrew Johnson, Andy GleadallAndy Gleadall, Xiaoxiao HanAdditive 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.
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