A procedure for superposing linear cohesive laws to represent multiple damage mechanisms in the fracture of composites

• Type: Article in International Scientific Journal
• Date: 2009

Authors

Davila, CG (Author) Other; Rose, CA (Author) Other; Camanho, PP (Author) FEUP

Journal

Title: International Journal of Fracture

Vol. 158

Pages: 211-223

ISSN: 0376-9429

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 166 Citations

Scopus - 197 Citations

Other information

Authenticus ID: P-003-H2W

DOI: 10.1007/s10704-009-9366-z

Abstract (EN): The relationships between a resistance curve (R-curve), the corresponding fracture process zone length, the shape of the traction-displacement softening law, and the propagation of fracture are examined in the context of the through-the-thickness fracture of composite laminates. A procedure for superposing linear cohesive laws to approximate an experimentally-determined R-curve is proposed. Simple equations are developed for determining the separation of the critical energy release rates and the strengths that define the independent contributions of each linear softening law in the superposition. The proposed procedure is demonstrated for the longitudinal fracture of a fiber-reinforced polymer-matrix composite. It is shown that the R-curve measured with a Compact Tension Specimen test cannot be predicted using a linear softening law, but can be reproduced by superposing two linear softening laws.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 13