A New Procedure for Mode I Fracture Characterization of Cement-Based Materials

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

Authors

de Moura, MFSF (Author) FEUP; Dourado, N (Author) Other; Xavier, J (Author) Other; Pereira, FAM (Author) Other

Journal

Title: Strain

Vol. 51

Pages: 483-491

ISSN: 0039-2103

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 3 Citations

Scopus - 6 Citations

Scientific classification

CORDIS: Technological sciences > Engineering > Mechanical engineering

FOS: Engineering and technology > Mechanical engineering

Other information

Authenticus ID: P-00J-Y7F

DOI: 10.1111/str.12165

Abstract (EN): Fracture characterization under mode I loading of a cement-based material using the single-edge-notched beam loaded in tree-point-bending was performed. A new method based on beam theory and crack equivalent concept is proposed to evaluate the Resistance-curve, which is essential to determine fracture toughness with accuracy. The method considers the existence of a stress relief region in the vicinity of the crack, dispensing crack length monitoring during experiments. A numerical validation was performed by finite element analysis considering a bilinear cohesive damage model. Experimental tests were performed in order to validate the numerical procedure. Digital image correlation technique was used to measure the specimen displacement with accuracy and without interference. Excellent agreement between numerical and experimental load-displacement curves was obtained, which validates the procedure.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9