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Bioinspired Investigation via X-Ray Microtomography / Laura E. North

DOI (Published version): 10.23889/Suthesis.43706

Abstract

Biological materials and systems are increasingly studied to provide inspiration, throughthe correlation of structure and function, for the design of materials in areas such astechnology, engineering and medicine. X-ray microtomography allows three dimensionaland non-destructive visualisation of bot...

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Published: 2018
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
URI: https://cronfa.swan.ac.uk/Record/cronfa43706
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first_indexed 2018-09-06T12:58:27Z
last_indexed 2018-09-06T12:58:27Z
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spelling 2018-09-06T10:58:44.9794514 v2 43706 2018-09-06 Bioinspired Investigation via X-Ray Microtomography 2018-09-06 Biological materials and systems are increasingly studied to provide inspiration, throughthe correlation of structure and function, for the design of materials in areas such astechnology, engineering and medicine. X-ray microtomography allows three dimensionaland non-destructive visualisation of both internal and external structures. It is the primarymethod used in this study to identify and investigate these natural structures and theirfunctions. Both quantitative and qualitative analysis is performed on the resulting 3D volumetricdata. Further insight is achieved by incorporating complementary methods includinghigh-resolution electron microscopy, nanoindentation and additive layer manufacturing tocharacterise the structures at varying length scales in terms of their structural, chemicaland mechanical properties. Two detailed case studies are given: the vertebrae of the heroshrew (Scutisorex somereni); and the cuttlebone of Sepia officinalis.Hero shrew vertebrae are analysed for the first time using X-ray microtomography. Largevariations in vertebrae volume, surface area and pillar count are shown across samples.Additive layer manufacturing is used to test a simple method for understanding flexibilityacross the vertebrae. The results show limitations of movement in certain directions, givingpotential inspiration for applications in robotics and flexible shafts.The diversity of internal architecture of the cuttlebone is captured for the first time inthree dimensions, highlighting substantial variation in the morphology of pillars. New frameworksare established for pillar morphology across the cuttlebone. These provide a greaterunderstanding to the relationship between pillar morphology and fluid interaction with thestructures of the cuttlebone. Mechanical analysis via time-lapse compression testing showsa progressive collapse mechanism of the chambers. The morphology and properties investigatedcan provide inspiration for improved design of cellular structures, energy absorptionand protection, and potentially for the design of a sophisticated buoyancy device. E-Thesis 31 12 2018 2018-12-31 10.23889/Suthesis.43706 A selection of third party content is redacted or is partially redacted from this thesis. COLLEGE NANME COLLEGE CODE Swansea University Doctoral Ph.D EPSRC 2018-09-06T10:58:44.9794514 2018-09-06T10:11:39.3054641 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Laura E. North 1 0043706-06092018105825.pdf North_Laura_E_PhD_Redacted.pdf 2018-09-06T10:58:25.9170000 Output 56957603 application/pdf Redacted version - open access true 2018-09-06T00:00:00.0000000 true
title Bioinspired Investigation via X-Ray Microtomography
spellingShingle Bioinspired Investigation via X-Ray Microtomography
,
title_short Bioinspired Investigation via X-Ray Microtomography
title_full Bioinspired Investigation via X-Ray Microtomography
title_fullStr Bioinspired Investigation via X-Ray Microtomography
title_full_unstemmed Bioinspired Investigation via X-Ray Microtomography
title_sort Bioinspired Investigation via X-Ray Microtomography
author ,
author2 Laura E. North
format E-Thesis
publishDate 2018
institution Swansea University
doi_str_mv 10.23889/Suthesis.43706
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 1
active_str 0
description Biological materials and systems are increasingly studied to provide inspiration, throughthe correlation of structure and function, for the design of materials in areas such astechnology, engineering and medicine. X-ray microtomography allows three dimensionaland non-destructive visualisation of both internal and external structures. It is the primarymethod used in this study to identify and investigate these natural structures and theirfunctions. Both quantitative and qualitative analysis is performed on the resulting 3D volumetricdata. Further insight is achieved by incorporating complementary methods includinghigh-resolution electron microscopy, nanoindentation and additive layer manufacturing tocharacterise the structures at varying length scales in terms of their structural, chemicaland mechanical properties. Two detailed case studies are given: the vertebrae of the heroshrew (Scutisorex somereni); and the cuttlebone of Sepia officinalis.Hero shrew vertebrae are analysed for the first time using X-ray microtomography. Largevariations in vertebrae volume, surface area and pillar count are shown across samples.Additive layer manufacturing is used to test a simple method for understanding flexibilityacross the vertebrae. The results show limitations of movement in certain directions, givingpotential inspiration for applications in robotics and flexible shafts.The diversity of internal architecture of the cuttlebone is captured for the first time inthree dimensions, highlighting substantial variation in the morphology of pillars. New frameworksare established for pillar morphology across the cuttlebone. These provide a greaterunderstanding to the relationship between pillar morphology and fluid interaction with thestructures of the cuttlebone. Mechanical analysis via time-lapse compression testing showsa progressive collapse mechanism of the chambers. The morphology and properties investigatedcan provide inspiration for improved design of cellular structures, energy absorptionand protection, and potentially for the design of a sophisticated buoyancy device.
published_date 2018-12-31T03:55:01Z
_version_ 1763752753521229824
score 11.014537

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