Fracture and resistance-curve behavior in hybrid natural fiber and polypropylene fiber reinforced composites

This article presents the results of a combined experimental and theoretical study of fracture and resistance-curve behavior of hybrid natural fiber- and synthetic polymer fiber-reinforced composites that are being developed for potential applications in affordable housing. Fracture and resistance-curve behavior are studied using single-edge notched bend specimens. The sisal fibers used were examined using atomic force microscopy for fiber bundle structures. The underlying crack/microstructure interactions and fracture mechanisms are elucidated via in situ optical microscopy and ex-situ environmental scanning microscopy techniques. The observed crack bridging mechanisms are modeled using small and large scale bridging concepts. The implications of the results are then discussed for the design of eco-friendly building materials that are reinforced with natural and polypropylene fibers.

Princeton University

Princeton University

Division of Civil and Mechanical Science Foundation [CMS 0303492]

Division of Civil and Mechanical Science Foundation

Division of Materials Research of the National Science Foundation

Division of Materials Research of the National Science Foundation [DMR 0231418]

Brazilian agency FAPESP

Brazilian agency Fapesp [Fapesp 2010/16524-0]

Brazilian agency CNPq

Brazilian agency CNPq [CNPq. 305792/2009-1]