Mixed-mode I+II fracture characterization of human cortical bone using the Single Leg Bending test

F G A Silva; M F S F de Moura; N Dourado; J Xavier; F A M Pereira; J J L Morais; M I R Dias

doi:10.1016/j.jmbbm.2015.09.004

Mixed-mode I+II fracture characterization of human cortical bone using the Single Leg Bending test

J Mech Behav Biomed Mater. 2016 Feb:54:72-81. doi: 10.1016/j.jmbbm.2015.09.004. Epub 2015 Sep 11.

Authors

F G A Silva¹, M F S F de Moura², N Dourado³, J Xavier⁴, F A M Pereira⁵, J J L Morais⁶, M I R Dias⁶

Affiliations

¹ INEGI - Instituto de Ciência e Inovação em Engenharia Mecânica e Engenharia Industrial, Rua Dr. Roberto Frias 400, 4200-465 Porto, Portugal.
² Faculdade de Engenharia da Universidade do Porto, Departamento de Engenharia Mecânica, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
³ 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. Electronic address: ndourado@utad.pt.
⁴ 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.
⁵ Faculdade de Engenharia da Universidade do Porto, Departamento de Engenharia Mecânica, 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.
⁶ 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.

PMID: 26433088
DOI: 10.1016/j.jmbbm.2015.09.004

Abstract

Mixed-mode I+II fracture characterization of human cortical bone was analyzed in this work. A miniaturized version of the Single Leg Bending test (SLB) was used owing to its simplicity. A power law criterion was verified to accurately describe the material fracture envelop under mixed-mode I+II loading. The crack tip opening displacements measured by digital image correlation were used in a direct method to determine the cohesive law mimicking fracture behavior of cortical bone. Cohesive zone modeling was used for the sake of validation. Several fracture quantities were compared with the experimental results and the good agreement observed proves the appropriateness of the proposed procedure for fracture characterization of human bone under mixed-mode I+II loading.

Keywords: Fracture characterization; Human cortical bone; Mixed-mode I+II; Single Leg Bending test.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Adult
Algorithms
Biomechanical Phenomena
Finite Element Analysis
Fractures, Bone / physiopathology*
Humans
Leg / physiopathology*
Male
Mechanical Phenomena*
Models, Biological
Tibia / injuries
Young Adult