Title: Modeling the Stress-Strain Response of Continuous Fber Reinforced Cement Composites

Author(s): Sadatoshi Ohno and D. J. Hannant

Publication: Materials Journal

Volume: 91

Issue: 3

Appears on pages(s): 306-312

Keywords: cements; composite materials; fiber reinforced concretes; polypropylene fibers; stress transfer; Materials Research

DOI: 10.14359/4293

Date: 5/1/1994

Abstract:
This paper describes a theoretical model of stress transfer between polypropylene fibrillated fibers and the matrix in fiber cement composites. The model is based on microscopic observations of the tensile fracture process which demonstrate that slip occurs within the polymer due to shear stress during multiple cracking, as well as at the fiber-matrix interface. Therefore, the proposed model allows for frictional stress transfer at two different interfaces, i.e., the matrix-fiber interface and the polymer slip surface within the fibers. The tensile stress-strain curve predicted by this model has two different slopes in the multiple cracking region, i.e., a horizontal part and a rising stress part. Also, the predictions of this model provide reasonable agreement with the experimental results of fibrillated polypropylene fiber cement composites.