Micro-mechanical Analysis of Fiber Reinforced Cementitious Composites

Abstract

This paper discusses the mechanism appearing during fiber debonding in fiber reinforced cementitious composites with special emphasis on Engineered Cementitious Composites (ECC). The investigation is performed on the micro scale by use of a Finite Element Model. The model is 3 dimensional and the Fictitious Crack Model (FCM) and a mixed mode interface model are implemented. It is shown that the cohesive law for a unidirectional fiber reinforced cementitious composite can be found through superposition of the cohesive law for mortar and the fiber bridging curve. A comparison between the numerical and an analytical model for fiber pull-out is performed.