Mode I fracture characterization of human bone using the DCB test

• Tipo: Artigo em Livro de Atas de Conferência Nacional
• Data: 2014-02-06

Autores

M. F. S. F. de Moura (Autor) FEUP; F. Silva (Autor) Outra; N. Dourado (Autor) Outra; F. A. M. Pereira (Autor) Outra; J. J. L. Morais (Autor) Outra; M. I. R. Dias (Autor) Outra; P. J. Lourenço (Autor) Outra; F. M. Judas (Autor) Outra

Ata de Conferência Nacional

Título: XIV Portuguese Conference on Fracture

Páginas: 53-60

Outras Informações

Abstract (EN): Fracture characterization of human cortical bone under pure mode I loading is performed in this work. A miniaturized version of the double cantilever test (DCB) test was used for the experimental tests. A data reduction scheme based on crack equivalent concept and Timoshenko beam theory is proposed to overcome difficulties inherent to crack length monitoring during the test. The application of the method propitiates an easy determination of the Resistance-curves that allow defining the fracture energy under mode I loading from the plateau region. The average value of fracture energy was subsequently used in a numerical analysis with element method involving cohesive zone modelling. The aim is to validate the proposed test and procedure concerning fracture characterization of human cortical bone under pure mode I loading. A bilinear cohesive zone model was used to simulate damage initiation and growth. The cohesive parameters were determined by an inverse procedure involving the fitting of numerical and experimental load-displacement curves. The excellent agreement obtained reveals that the proposed test and associated methodology is quite effective concerning fracture characterization of human cortical bone under pure mode I loading.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8