Mixed-mode I+II continuum damage model applied to fracture characterization of bonded joints

• Type: Article in International Scientific Journal
• Date: 2013

Authors

Chousal, JAG (Author) FEUP; de Moura, MFSF (Author) FEUP

Journal

Title: International Journal of Adhesion and Adhesives

Vol. 41

Pages: 92-97

ISSN: 0143-7496

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 6 Citations

ISI Web of Science

Scopus - 14 Citations

Scientific classification

FOS: Engineering and technology > Chemical engineering

Other information

Authenticus ID: P-002-031

DOI: 10.1016/j.ijadhadh.2012.10.014

Abstract (EN): A continuum mixed-mode I+II damage model allowing simulation of damage initiation and propagation in adhesive bonded joints is presented. The model is based on a stress criterion to identify damage onset and a fracture mechanics criterion to simulate gradual degradation of stiffness during loading. It is implemented in two-dimensional solid elements thus allowing identifying the volumetric shape of damaged regions in the vicinity of the crack tip. Additionally, the model is able to predict crack kinking which occurs as a function of the used criteria. The application of the proposed methodology in the context of pure modes (I and II) fracture characterization tests of bonded joints provide the evaluation of the influence of asymmetric propagation on the measured fracture energies. This phenomenon becomes more relevant with the increase of adhesive thickness.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6