Micromechanics of Sea Urchin spines.

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...

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Autores principales:	Naomi Tsafnat, John D Fitz Gerald, Hai N Le, Zbigniew H Stachurski
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/157ccc5f477c43f9868388b1c43b7d30
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spelling	oai:doaj.org-article:157ccc5f477c43f9868388b1c43b7d302021-11-18T07:06:05ZMicromechanics of Sea Urchin spines.1932-620310.1371/journal.pone.0044140https://doaj.org/article/157ccc5f477c43f9868388b1c43b7d302012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22984468/?tool=EBIhttps://doaj.org/toc/1932-6203The 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.Naomi TsafnatJohn D Fitz GeraldHai N LeZbigniew H StachurskiPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 9, p e44140 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Naomi Tsafnat John D Fitz Gerald Hai N Le Zbigniew H Stachurski Micromechanics of Sea Urchin spines.
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. 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.
format	article
author	Naomi Tsafnat John D Fitz Gerald Hai N Le Zbigniew H Stachurski
author_facet	Naomi Tsafnat John D Fitz Gerald Hai N Le Zbigniew H Stachurski
author_sort	Naomi Tsafnat
title	Micromechanics of Sea Urchin spines.
title_short	Micromechanics of Sea Urchin spines.
title_full	Micromechanics of Sea Urchin spines.
title_fullStr	Micromechanics of Sea Urchin spines.
title_full_unstemmed	Micromechanics of Sea Urchin spines.
title_sort	micromechanics of sea urchin spines.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/157ccc5f477c43f9868388b1c43b7d30
work_keys_str_mv	AT naomitsafnat micromechanicsofseaurchinspines AT johndfitzgerald micromechanicsofseaurchinspines AT hainle micromechanicsofseaurchinspines AT zbigniewhstachurski micromechanicsofseaurchinspines
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Micromechanics of Sea Urchin spines.

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