Wood fracture characterization under mode I loading using the three-point-bending test. Experimental investigation of Picea abies L.

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

Authors

de Moura, MFSF (Author) FEUP; Dourado, N (Author) Other; Morel, S (Author) Other; Morais, JJL (Author) Other

Journal

Title: International Journal of Fracture

Vol. 194

Pages: 1-9

ISSN: 0376-9429

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 7 Citations

Scopus - 0 Citations

Scientific classification

CORDIS: Technological sciences > Engineering > Mechanical engineering

FOS: Engineering and technology > Mechanical engineering

Other information

Authenticus ID: P-00G-CKB

DOI: 10.1007/s10704-015-0029-y

Abstract (EN): Mode I fracture characterization was performed in wood using the single-edge-notched beam loaded in three-point-bending (SEN-TPB). A data reduction scheme based on equivalent linear elastic fracture mechanics concept was used to evaluate the Resistance-curve instead of classical methods. The method is founded on assessment of an equivalent crack from specimen compliance using beam theory and the existence of a stress relief region in the crack vicinity. Crack length monitoring is unnecessary during the loading process, providing a complete Resistance-curve which is essential for a clear identification of the fracture energy. Experimental results were obtained from fracture tests involving geometrically similar SEN-TPB specimens of different sizes. It was observed that the smallest tested specimen is inadequate to estimate the fracture energy due to fracture process zone confinement. Contrarily, the other two are suitable for such purpose. An inverse method was used to determine a bilinear cohesive law representative of wood material fracture. It was concluded that a unique cohesive law is able to mimic the fracture behaviour of considered specimen sizes.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9