Analytical solution of the bond behavior of FRCM composites using a rigid-softening cohesive material law. (1st October 2019)

• Record Type: Journal Article
• Authors: Calabrese, Angelo Savio; Colombi, Pierluigi; D'Antino, Tommaso
• Is Part Of: Composites. Number 174(2019)
• Publication Date: 2019-10-01
• Subjects: FRCM -- TRM -- Analytical approach -- Cohesive material law -- Debonding; Composite materials -- Periodicals; Materials science -- Periodicals; Composite materials; Periodicals; Electronic journals; 620.118
• DOI: 10.1016/j.compositesb.2019.107051
• Languages: English
• ISSNs: 1359-8368

Abstract

Abstract: The study of the bond behavior of fiber-reinforced composite materials applied to cohesive substrates is a fundamental topic to correctly understand the composite-substrate stress-transfer mechanism. Bond tests of fiber reinforced cementitious matrix (FRCM) composites comprising one layer of fiber textile generally showed failure due to debonding of the textile at the matrix-fiber interface. This failure mode was described considering a fracture mechanics pure Mode-II loading condition, which provided a bond differential equation that was solved once a certain shape of the interface cohesive material law was assumed. In this paper, a rigid-softening cohesive material law, which considers the possible presence of friction stress contributions at the debonding interface, is adopted to provide the analytical solution of the matrix-fiber interface full-range behavior in FRCM composites. The solution obtained is employed to reproduce the load responses of a PBO FRCM composite subjected to a recently-developed pull-out test and validate the analytical approach.