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Micromechanical theory and uniaxial tensile tests of fiber reinforced cement composites

Published online by Cambridge University Press:  31 January 2011

C.C. Yang ,
T. Mura  and
S.P. Shah
C.C. Yang
Affiliation:
National Science Foundation Center for Science and Technology of Advanced Cement-Based Materials, Northwestern University, Evanston, Illinois 60208
T. Mura
Affiliation:
National Science Foundation Center for Science and Technology of Advanced Cement-Based Materials, Northwestern University, Evanston, Illinois 60208
S.P. Shah
Affiliation:
National Science Foundation Center for Science and Technology of Advanced Cement-Based Materials, Northwestern University, Evanston, Illinois 60208
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Abstract

The mechanism of fracture arrest in brittle-matrix composites with strong, long fibers is analyzed by using the inclusion method. The maximum stress contribution of the matrix in composites is discussed in this paper. A critical volume fraction of fibers fc is theoretically derived. If the volume fraction f is less than fc, then debonding between fibers and matrix occurs before the crack propagates through the whole section. If f is greater than fc, then no debonding occurs before the crack propagates through the whole section. The value of fc depends on the matrix and fiber properties and the bond character of the interface. To verify the analytical predictions, experiments on fiber reinforced cement composites subjected to uniaxial tension were conducted. The results of the theoretical predictions were also compared satisfactorily with other published experimental data.

Type
Articles
Information
Journal of Materials Research , Volume 6 , Issue 11 , November 1991 , pp. 2463 - 2473
Copyright
Copyright © Materials Research Society 1991

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