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Micromechanics of sea urchin spines

Tsafnat, Naomi; Fitz Gerald, John D.; Le, Hai N.; Stachurski, Zbigniew H.

Description

The endoskeletal structure of the Sea Urchin, Centrostephanus rodgersii, has numerous long spines whose known functions include locomotion, sensing, and protection against predators. These spines have a remarkable internal microstructure and are made of single-crystal calcite. A finite-element model of the spine's unique porous structure, based on micro-computed tomography (microCT) and incorporating anisotropic material properties, was developed to study its response to mechanical loading....[Show more]

dc.contributor.authorTsafnat, Naomi
dc.contributor.authorFitz Gerald, John D.
dc.contributor.authorLe, Hai N.
dc.contributor.authorStachurski, Zbigniew H.
dc.date.accessioned2015-11-24T23:57:44Z
dc.date.available2015-11-24T23:57:44Z
dc.identifier.issn1932-6203
dc.identifier.urihttp://hdl.handle.net/1885/16707
dc.description.abstractThe endoskeletal structure of the Sea Urchin, Centrostephanus rodgersii, has numerous long spines whose known functions include locomotion, sensing, and protection against predators. These spines have a remarkable internal microstructure and are made of single-crystal calcite. A finite-element model of the spine's unique porous structure, based on micro-computed tomography (microCT) and incorporating anisotropic material properties, was developed to study its response to mechanical loading. Simulations show that high stress concentrations occur at certain points in the spine's architecture; brittle cracking would likely initiate in these regions. These analyses demonstrate that the organization of single-crystal calcite in the unique, intricate morphology of the sea urchin spine results in a strong, stiff and lightweight structure that enhances its strength despite the brittleness of its constituent material.
dc.format10 pages
dc.publisherPublic Library of Science
dc.rights© 2012 Tsafnat et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
dc.sourcePLoS ONE
dc.subjectanimal structures
dc.subjectanimals
dc.subjectaustralia
dc.subjectbiomechanical phenomena
dc.subjectcalcium carbonate
dc.subjectcrystallization
dc.subjectelasticity
dc.subjectfinite element analysis
dc.subjectimage processing, computer-assisted
dc.subjectmodels, biological
dc.subjectsea urchins
dc.subjectstress, mechanical
dc.subjecttorsion, mechanical
dc.subjectx-ray microtomography
dc.titleMicromechanics of sea urchin spines
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume7
dcterms.dateAccepted2012-07-30
dc.date.issued2012-09-11
local.identifier.absfor040599
local.identifier.ariespublicationf5625xPUB1337
local.publisher.urlhttps://www.plos.org/
local.type.statusPublished Version
local.contributor.affiliationTsafnat, N, University of New South Wales, Australia
local.contributor.affiliationFitz Gerald, John, College of Physical and Mathematical Sciences, CPMS Research School of Earth Sciences, RSES General, The Australian National University
local.contributor.affiliationLe, Hai, College of Engineering and Computer Science, College of Engineering and Computer Science, Research School of Engineering, The Australian National University
local.contributor.affiliationStachurski, Zbigniew, College of Engineering and Computer Science, College of Engineering and Computer Science, Research School of Engineering, The Australian National University
local.identifier.essn1932-6203
local.bibliographicCitation.issue9
local.bibliographicCitation.startpagee44140
local.bibliographicCitation.lastpage10
local.identifier.doi10.1371/journal.pone.0044140
local.identifier.absseo970104
dc.date.updated2015-12-10T10:35:49Z
local.identifier.scopusID2-s2.0-84866297915
local.identifier.thomsonID000308638700045
CollectionsANU Research Publications

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