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Analysis of Synthetic Fiber Pull-Out from a Cement Matrix

Published online by Cambridge University Press:  21 February 2011

Youjiang Wang ,
Victor C. Li  and
Stanley Backer
Youjiang Wang
Affiliation:
Department of Mechanical Engineering; Massachusetts Institute of Technology, Cambridge, MA 02139
Victor C. Li
Affiliation:
Department of Civil Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139
Stanley Backer
Affiliation:
Department of Mechanical Engineering; Massachusetts Institute of Technology, Cambridge, MA 02139
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Abstract

Experiments were conducted on specimens containing nylon or polypropylene monofilaments embedded in a precracked matrix. During pull-out tests, it was generally observed that the pulling force continued to increase after one or both sides of the filament had begun to slip out, even though one or both of the embedded filament lengths were decreasing. This indicated that the fiber/matrix shear stress increased with the fiber slippage distance. Examination of the extracted filaments under a scanning electron microscope (SEM) revealed the increased shear resistance to be the result of fiber surface abrasion. The severity of abrasion was observed to increase with the fiber slippage distance before complete pull-out. A theoretical model has been developed to predict the pull-out force versus displacement relationship based on given fiber/matrix shear strength as an increasing function of the slippage distance. The model gives good prediction in comparison with experimental results.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 114: Symposium R – Bonding in Cementitious Composites , 1987 , 159
Copyright
Copyright © Materials Research Society 1988

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References

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