Determining mode II cohesive law of Pinus pinaster by combining the end-notched flexure test with digital image correlation

• Type: Article in International Scientific Journal
• Date: 2014

Authors

J. Xavier (Author) Other; M. Oliveira (Author) Other; J. J. L. Morais (Author) Other; Marcelo Francisco Moura (Author) FEUP

Journal

Title: Construction and Building Materials

Vol. 71

Pages: 109-115

ISSN: 0950-0618

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 6 Citations

ISI Web of Science

Scopus - 13 Citations

Scientific classification

FOS: Engineering and technology > Mechanical engineering

Other information

Authenticus ID: P-009-T95

DOI: 10.1016/j.conbuildmat.2014.08.021

Abstract (EN): This work addresses the direct identification of cohesive law of Pinus pinaster in mode II. The end-notched flexure (ENF) test is selected for mode II loading. The strain energy release rate in mode II (G(II)) is determined according to the compliance-based beam method (CBBM) by processing the global load-displacement curve, without requirements to monitor the crack length during test. The fracture test is coupled with digital image correlation (DIC) for the local measurement of the crack tip opening displacement in mode II (w(II)). Using a direct method, the cohesive law in mode II (sigma(II)-w(II)) is determined by differentiating the G(II)-w(II) relationship. The procedure is validated from both numerical, using finite element analyses including cohesive zone modelling, and experimental approaches. The methodology and accuracy on this reconstruction is discussed. It is concluded that the proposed data reduction scheme is suitable for assessing the cohesive law of P. pinaster in mode II.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7