Mixed mode fracture analysis in a polymer mortar using the Brazilian disk test. (March 2016)

• Record Type: Journal Article
• Authors: Martínez-López, M.; Martínez-Barrera, G.; Nunes, L.C.S.; Reis, J.M.L.; da Costa Mattos, H.S.
• Is Part Of: Engineering fracture mechanics. Volume 154(2016)
• Page Start: 140
• Page End: 151
• Publication Date: 2016-03
• Subjects: Polymer mortar -- Mixed mode fracture -- Brazilian disc test -- Failure criterion; Fracture mechanics -- Periodicals; Rupture, Mécanique de la -- Périodiques; Fracture mechanics; Periodicals; 620.112605
• DOI: 10.1016/j.engfracmech.2016.01.007
• Languages: English
• ISSNs: 0013-7944

Abstract

Highlights: The fracture of polymer mortar in combined mode I and II is analysed. The Brazilian disk test is used in the experimental study. DIC method is used to obtain the full-field displacement close to the crack tip. Unilateral contact and friction between the crack lips depend on the crack orientation. A failure criterion is proposed with a good correlation with the experimental results. Abstract: Up to now the failure load assessment of cracked polymer mortar plates is still not fully understood, especially when complex fracture modes are involved. The present paper is concerned with the failure analysis of cracked polymer mortar plates in combined mode I and II. The Brazilian disk, a classic mixed mode fracture test specimen, was adopted for the experimental characterisation of the crack initiation. Digital Image Correlation (DIC) method was used to obtain the full-field displacement close to the crack tip and a failure criterion is proposed with a good correlation with the experimental results.