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Fracture of three-dimensional lattices manufactured by selective laser melting

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)147-159
Number of pages13
JournalInternational Journal of Solids and Structures
Volume180-181
Early online date29 Jul 2019
DOIs
DateAccepted/In press - 28 Jul 2019
DateE-pub ahead of print (current) - 29 Jul 2019
DatePublished - 15 Dec 2019

Abstract

Experimentation has been performed to measure the fracture behaviour of three-dimensional lattices manufactured using a Selective Laser Melting (SLM) technique. Specimens have been designed using a compact tension (CT) geometry with different lattice orientations and fabricated from a relatively brittle Aluminum alloy. The toughness has been measured and an increase in fracture resistance has been observed during crack extension. The influence of lattice orientation has been demonstrated, which shows that a change in orientation will result in a different crack path, but the effect on toughness is small. Finally, the significance of specimen size on toughness measurement has been investigated using finite element (FE) analysis. The results show that the experimentally measured result have overestimated the fracture toughness of the lattice specimens by approximately 10% due to the insufficiently large specimen size.

    Research areas

  • FE analysis, Fracture test, Fracture toughness, Lattice orientation, Lattices

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  • Full-text PDF (author’s accepted manuscript)

    Rights statement: This is the author accepted manuscript (AAM). The final published version (version of record) is available online via Elsevier at https://www.sciencedirect.com/science/article/pii/S0020768319303403?via%3Dihub#!. Please refer to any applicable terms of use of the publisher.

    Accepted author manuscript, 17 MB, PDF document

    Embargo ends: 29/07/20

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    Licence: CC BY-NC-ND

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