The shear strength of the adhesive bond between a steel wire and an epoxy resin has been measured and it has been found that when the composite is under pressure the strength corresponds closely to the shear yield stress of the resin determined in a plane strain compression test. Discrepancies at low pressure may be due to the nucleation of stress-concentrating cracks. Measurements of the friction stress between the wire and the resin as a function of pressure indicated that the coefficient of friction was 0·5 and that the compressive stress at the interface due to resin shrinkage was 7 Nmm−2 (1000 psi).
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Bowden, P.B. The effect of hydrostatic pressure on the fibre-matrix bond in a steel-resin model composite. J Mater Sci 5, 517–520 (1970). https://doi.org/10.1007/BF00556039
- Shear Strength
- Compressive Stress