Fracture characterization of human cortical bone under mode II loading using the end-notched flexure test.

Autor:	Silva FGA; INEGI - Instituto de Ciência e Inovação em Engenharia Mecânica e Engenharia Industrial, Rua Dr. Roberto Frias, 400, 4200-465, Porto, Portugal., de Moura MFSF; Departamento de Engenharia Mecânica, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal., Dourado N; CMEMS-UMinho, Departamento de Engenharia Mecânica, Universidade do Minho, Campus de Azurém, 4804-533, Guimarães, Portugal. nunodourado@dem.uminho.pt., Xavier J; INEGI - Instituto de Ciência e Inovação em Engenharia Mecânica e Engenharia Industrial, Rua Dr. Roberto Frias, 400, 4200-465, Porto, Portugal.; Centre for the Research and Technology of Agro-Environmental and Biological Sciences, CITAB, University of Trás-os-Montes and Alto Douro, UTAD, Quinta de Prados, 5000-801, Vila Real, Portugal., Pereira FAM; Departamento de Engenharia Mecânica, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal.; Centre for the Research and Technology of Agro-Environmental and Biological Sciences, CITAB, University of Trás-os-Montes and Alto Douro, UTAD, Quinta de Prados, 5000-801, Vila Real, Portugal., Morais JJL; Centre for the Research and Technology of Agro-Environmental and Biological Sciences, CITAB, University of Trás-os-Montes and Alto Douro, UTAD, Quinta de Prados, 5000-801, Vila Real, Portugal., Dias MIR; Centre for the Research and Technology of Agro-Environmental and Biological Sciences, CITAB, University of Trás-os-Montes and Alto Douro, UTAD, Quinta de Prados, 5000-801, Vila Real, Portugal., Lourenço PJ; Banco de Tecidos Ósseos do Centro Hospitalar e Universitário de Coimbra - CHUC, EPE, Faculdade de Medicina da Universidade de Coimbra, Praceta Prof. Mota Pinto, 3030-396, Coimbra, Portugal., Judas FM; Banco de Tecidos Ósseos do Centro Hospitalar e Universitário de Coimbra - CHUC, EPE, Faculdade de Medicina da Universidade de Coimbra, Praceta Prof. Mota Pinto, 3030-396, Coimbra, Portugal.
Jazyk:	angličtina
Zdroj:	Medical & biological engineering & computing [Med Biol Eng Comput] 2017 Aug; Vol. 55 (8), pp. 1249-1260. Date of Electronic Publication: 2016 Oct 25.
DOI:	10.1007/s11517-016-1586-6
Abstrakt:	Fracture characterization of human cortical bone under mode II loading was analyzed using a miniaturized version of the end-notched flexure test. A data reduction scheme based on crack equivalent concept was employed to overcome uncertainties on crack length monitoring during the test. The crack tip shear displacement was experimentally measured using digital image correlation technique to determine the cohesive law that mimics bone fracture behavior under mode II loading. The developed procedure was validated by finite element analysis using cohesive zone modeling considering a trapezoidal with bilinear softening relationship. Experimental load-displacement curves, resistance curves and crack tip shear displacement versus applied displacement were used to validate the numerical procedure. The excellent agreement observed between the numerical and experimental results reveals the appropriateness of the proposed test and procedure to characterize human cortical bone fracture under mode II loading. The proposed methodology can be viewed as a novel valuable tool to be used in parametric and methodical clinical studies regarding features (e.g., age, diseases, drugs) influencing bone shear fracture under mode II loading.
Databáze:	MEDLINE
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