Mode II fracture characterization of a hybrid cork/carbon-epoxy laminate

• Type: Article in International Scientific Journal
• Date: 2015

Authors

Marcelo Francisco Moura (Author) FEUP; R. Fernandes (Author) Other; F. G. A. Silva (Author) Other; N. Dourado (Author) Other

Journal

Title: Composites Part B: Engineering

Vol. 76

Pages: 44-51

ISSN: 1359-8368

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 10 Citations

ISI Web of Science

Scopus - 19 Citations

Scientific classification

FOS: Engineering and technology > Mechanical engineering

Other information

Authenticus ID: P-00A-7WF

DOI: 10.1016/j.compositesb.2015.02.010

Abstract (EN): Fracture characterization under mode II loading of a hybrid laminate composed by a unidirectional carbon fiber-epoxy composite and cork was performed using the End Notched Flexure test. A data reduction scheme based on equivalent crack length concept, specimen compliance and Timoshenko beam theory was applied to evaluate fracture toughness under mode II loading of a composed beam (cork and carbon-epoxy composite). The adopted procedure depends exclusively on the data issuing from load displacement (P-6) curve and does not require crack length monitoring during the test which is a difficult task to be accomplished with the necessary accuracy in the ENF test. A numerical analysis using cohesive zone modeling and an inverse procedure was performed to assess the mode II cohesive law that simulates the material fracture under shear loading. It was concluded that hybridization is advantageous relative to monolithic carbon-epoxy laminate in which concerns the observed failure mode, which altered from typically brittle to very ductile thus contributing to avoid sudden shear failures in real applications.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8