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Stress deformation and fluid pressure of bone specimens under cyclic loading / Ling, Hoe I. in Journal of engineering mechanics, Vol. 135 N° 5 (Mai 2009) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 135 N° 5 (Mai 2009) . - pp. 375-381 Titre : Stress deformation and fluid pressure of bone specimens under cyclic loading Type de document : texte imprimé Auteurs : Ling, Hoe I., Auteur ; Emi Ling, Auteur ; Jui-Pin Wang, Auteur Article en page(s) : pp. 375-381 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Human  factors  Biological  properties  Mechanical  properties  Deformation  Cyclic  loads. Résumé : Cyclic loading has been known to induce fluid flow and thus mechanotransduction in bones. In the past, four-point bending tests have been used exclusively in studying fluid flow in bones. In order to better understand the mechanism of deformation and fluid flow under loading, compression tests were done on trabecular bone specimens under drained and undrained conditions. In the drained tests, the volume change was observed, whereas in the undrained tests, excess pore fluid pressure was measured. Cyclic loading tests were conducted in addition to monotonic loading tests to observe the permanent volume change or excess pore fluid pressure with loading cycles. A fast loading rate gave a sharp rise in the excess fluid pressure compared to a slow loading rate. The strength and stiffness of the specimens appeared to deteriorate with an increased speed of loadings, but there was no appreciable difference between the results obtained from drained and undrained tests. The drained and undrained tests as described allowed a better understanding of bone behavior under loadings for a coupled stress-flow analysis. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JENMDT000 [...] [article] Stress deformation and fluid pressure of bone specimens under cyclic loading [texte imprimé] / Ling, Hoe I., Auteur ; Emi Ling, Auteur ; Jui-Pin Wang, Auteur . - pp. 375-381. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 135 N° 5 (Mai 2009) . - pp. 375-381 Mots-clés : Human  factors  Biological  properties  Mechanical  properties  Deformation  Cyclic  loads. Résumé : Cyclic loading has been known to induce fluid flow and thus mechanotransduction in bones. In the past, four-point bending tests have been used exclusively in studying fluid flow in bones. In order to better understand the mechanism of deformation and fluid flow under loading, compression tests were done on trabecular bone specimens under drained and undrained conditions. In the drained tests, the volume change was observed, whereas in the undrained tests, excess pore fluid pressure was measured. Cyclic loading tests were conducted in addition to monotonic loading tests to observe the permanent volume change or excess pore fluid pressure with loading cycles. A fast loading rate gave a sharp rise in the excess fluid pressure compared to a slow loading rate. The strength and stiffness of the specimens appeared to deteriorate with an increased speed of loadings, but there was no appreciable difference between the results obtained from drained and undrained tests. The drained and undrained tests as described allowed a better understanding of bone behavior under loadings for a coupled stress-flow analysis. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JENMDT000 [...]