Prediction and Verification of Interface Debonding for Fiber Reinforced Cementitious Material

ABOUT THE INTERNATIONAL CONCRETE ABSTRACTS PORTAL

  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal

  


Title: Prediction and Verification of Interface Debonding for Fiber Reinforced Cementitious Material

Author(s): S. H. Li, S. P. Shah, Z. Li, and T. Mura

Publication: Special Publication

Volume: 156

Issue:

Appears on pages(s): 125-152

Keywords: cracking (fracturing); fiber reinforced concretes; fluorescence; fracture properties; mathematical models; microscopy; tension; Materials Research

Date: 9/1/1995

Abstract:
A new method to predict the debonding behavior of fiber-matrix interface has been proposed by applying the principles of the micromechanics of inclusion and fracture mechanics. The validity of the mathematical model is further verified by uniaxial tension tests carried out on steel fiber reinforced cementitious composite specimens by employing a digitally controlled closed-loop MTS testing machine. It was demonstrated that the debonding occurs before the bend over point; the debonded lengths are largely influenced by the sequence of the occurrence of transverse matrix cracks and the loading stage. A stable growth of debonding was observed in the investigation. The measured debonded lengths were compared with the theoretical prediction of the proposed model. A reasonable agreement was observed.