Direct and inverse methods applied to the determination of mode I cohesive law of bovine cortical bone using the DCB test

• Type: Article in International Scientific Journal
• Date: 2017

Authors

de Moura, MFSF (Author) FEUP; Fábio Pereira (Author) Other; Nuno Dourado (Author) Other; José Morais (Author) Other; José Xavier (Author) Other; Maria Dias (Author) Other

Journal

Title: International Journal of Solids and Structures

Vol. 128

Pages: 210-220

ISSN: 0020-7683

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 5 Citations

ISI Web of Science

Scopus - 12 Citations

Scientific classification

CORDIS: Technological sciences > Engineering > Mechanical engineering

FOS: Engineering and technology > Mechanical engineering

Other information

Authenticus ID: P-00N-5HX

DOI: 10.1016/j.ijsolstr.2017.08.028

Abstract (EN): This work addresses the determination of the cohesive law under mode I loading of bovine cortical bone tissue using the Double Cantilever Beam (DCB) test. Direct and inverse methods were proposed to assess the cohesive laws representative of bone fracture under mode I loading. The direct method combines the evolution of the strain energy release rate under mode I loading with the crack tip opening displacement that is monitored by digital image correlation technique. According to this method, the cohesive law is obtained by differentiation of such relation with respect to the crack opening. The inverse procedure is performed through a finite element analysis including cohesive zone modelling, conjointly with a developed optimization algorithm. This identification strategy does not require a pre-established shape of the cohesive law as with the conventional inverse based procedures, which is viewed as a novelty of this work. It was concluded that both methods provide consistent results, being appellative tools concerning systematic and methodical studies dedicated to bone fracture characterization.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11