Fracture mechanics of laser sintered cracked polyamide for a new method to induce cracks by additive manufacturing
Brugo, T. and Palazzetti, R. and Ciric-Kostic, S. and Yan, X. T. and Minak, G. and Zucchelli, A. (2016) Fracture mechanics of laser sintered cracked polyamide for a new method to induce cracks by additive manufacturing. Polymer Testing, 50. pp. 301-308. ISSN 0142-9418 (https://doi.org/10.1016/j.polymertesting.2016.01.0...)
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Abstract
This paper presents an experimental investigation on specimens manufactured by Selective Laser Sintering (SLS), with the purposes of giving designers advice when designing 3D printed parts, and laying the basis for a step forward in the field of fracture mechanics of 3D complex parts. The aim is to investigate the effect of building direction in Polyamide (PA) 3D printed samples and to assess whether a crack can be initiated directly from the sintering process for fracture mechanics study purposes. Six different configurations of Mode I Compact Tension (CT) specimens were manufactured and tested; the experiments were monitored by Digital Image Correlation (DIC) and fractured surfaces were analyzed using microscopy. Results showed that samples with better mechanical performance are those in which all the layers contain a portion of the crack. On the other hand, those with layers parallel to the crack plan offer a preferential pathway for the crack to propagate. DIC and fractography investigations showed that, under certain conditions, small-radius geometries, or too-close surfaces may glue depending on printer resolution. Experiments also showed that SLS is capable of printing specimens with internal cracks that can be used to study fracture mechanics of complex parts or parts with internal cracks.
ORCID iDs
Brugo, T., Palazzetti, R. ORCID: https://orcid.org/0000-0003-3813-4090, Ciric-Kostic, S., Yan, X. T. ORCID: https://orcid.org/0000-0002-3798-7414, Minak, G. and Zucchelli, A.;-
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Item type: Article ID code: 55432 Dates: DateEvent1 April 2016Published2 February 2016Published Online2 February 2016AcceptedSubjects: Technology > Engineering (General). Civil engineering (General) > Engineering design Department: Faculty of Engineering > Design, Manufacture and Engineering Management Depositing user: Pure Administrator Date deposited: 02 Feb 2016 14:45 Last modified: 02 Oct 2024 00:25 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/55432