The Influence of the matrix Modulus on the interfacial Shear Strength Parameter

Published

February 25, 1998

Author(s)

Gale A. Holmes, R C. Peterson, Donald L. Hunston, Walter G. McDonough

Abstract

In composite structures, adhesion at the fiber-matrix interface is typically determined indirectly from experimental data and theoretical models. These models make varying assumptions about the fiber, matrix, and fragmentation process. Therefore, the success of this approach is dependent on how accurately the model captures the reality of fiber fragmentation in the tested system. Recent experimental data on the DGEBA/m-PDA epoxy resin system indicates that the simplifying assumption concerning the modulus in most interfacial shear strength models is not met in actual practice. This non-ideal behavior was shown to result in a value for the interfacial shear strength that is at least 15% lower than the value obtained from the linear elastic Cox model and 300% higher than the value obtained using the Kelly-Tyson model. The latter model assumes the matrix to be elastic-perfectly plastic.

Proceedings Title

Proceedings of the 21st Annual Meeting of the Adhesion Society

Conference Dates

February 22-25, 1998

Conference Location

Savannah, GA

Conference Title

The Adhesion Society

Pub Type

Conferences

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Keywords

Cox model, Kelly-Tyson Model, modulus, nonlinear viscoelasticity, secant modulus

Citation

Holmes, G. , Peterson, R. , Hunston, D. and McDonough, W. (1998), The Influence of the matrix Modulus on the interfacial Shear Strength Parameter, Proceedings of the 21st Annual Meeting of the Adhesion Society, Savannah, GA, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=851395 (Accessed October 20, 2025)