Cohesive and continuum mixed-mode damage models applied to the simulation of the mechanical behaviour of bonded joints

• Type: Article in International Scientific Journal
• Date: 2008

Authors

De Moura, MFSF (Author) FEUP; Goncalves, JPM (Author) Other; Chousal, JAG (Author) FEUP; Campilho, RDSG (Author) Other

Journal

Title: International Journal of Adhesion and Adhesives

Vol. 28 No. 8

Pages: 419-426

ISSN: 0143-7496

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 159 Citations

Scopus - 190 Citations

Scientific classification

FOS: Engineering and technology > Chemical engineering

Other information

Authenticus ID: P-003-TGC

DOI: 10.1016/j.ijadhadh.2008.04,004

Abstract (EN): The objective of this work is to discuss the adequacy of cohesive and continuum damage models for the prediction of the mechanical behaviour of bonded joints. A cohesive mixed-mode damage model appropriate for ductile adhesives is presented. The double cantilever beam and the end-notched flexure tests are proposed in order to evaluate the cohesive properties of the adhesive as a thin layer under mode I and mode II, respectively. A new data reduction scheme based on the crack equivalent concept is also proposed to overcome crack-monitoring difficulties during propagation in these fracture characterization tests. An inverse method to determine the cohesive parameters of the trapezoidal softening law is discussed. A continuum mixed-mode damage model is developed in order to better simulate the cases where adhesive thickness plays an important role. The model is applied to evaluate the effect of adhesive thickness on fracture characterization of adhesive joints. Some important conclusions about the advantages and drawbacks of cohesive and continuum damage models are reported.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8