Mode II fracture toughness of carbon-epoxy bonded joints with femtosecond laser treated surfaces

• Type: Article in International Scientific Journal
• Date: 2018

Authors

R. D. F. Moreira (Author) Other; V. Oliveira (Author) Other; F. G. A. Silva (Author) Other; R. Vilar (Author) Other; Marcelo F. S. F. de Moura (Author) FEUP

Journal

Title: International Journal of Mechanical Sciences

Vol. 148

Pages: 707-713

ISSN: 0020-7403

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 5 Citations

Scopus - 7 Citations

Other information

Authenticus ID: P-00P-NSB

DOI: 10.1016/j.ijmecsci.2018.09.029

Abstract (EN): Mode II fracture toughness of carbon-epoxy bonded joints considering laser treated surfaces was evaluated using the End-Notched Flexure (ENF) test. Four different surface preparations were performed using distinct processing conditions before bonding the specimen arms. The Resistance-curves of the fracture tests were obtained considering an equivalent crack length based procedure. The influence of the different surface treatments on the mode II fracture behaviour was assessed comparing the average values of the fracture toughness. It was verified that a laser treatment employing two interfering laser beams, which produces a complex multi-scale surface morphology free of contaminants, is the best surface preparation regarding higher values of the mode II fracture energy. A cohesive zone analysis was used aiming to validate the followed procedures. The excellent agreement obtained between numerical and experimental results reveals that the used techniques are sound.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7