Summary
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1.
The dynamic elastic modulus E′ and the loss factor tan δ of adhesive joints have been measured at a ultrasonic frequency of 50 kc/s by means of a coupled resonant bar method and the results of these resonance properties have been considered in their relation to those of the thickness b and the strength F of the joints.
From the results it was found that E′ as well as tan δ are so intimately correlated with the bond strength F that a single E′−F or tan δ−F correlation curve, typical of the adherend material, is obtained, independently of the type of adhesive and of the condition of adhesion employed, so long as comparison is made of the resonance properties and F at a fixed joint thickness b for each of adherends used.
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The results indicate the possibility that the resonant method for determining the resonance properties of an adhesive joint can be used as a nondestructive quality test of the joint.
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3)
The results obtained as regards E′−F and E'(F)−b relationships, and the effect upon them of adding some fillers has been qualitatively considered, taking into account the residual stresses and their distribution in the adhesive joint.
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Kanamaru, K., Ikari, K., Kishimoto, T. et al. Non-destructive quality test of adhesive joints by means of resonance measurements. Kolloid-Zeitschrift 170, 123–131 (1960). https://doi.org/10.1007/BF01525171
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DOI: https://doi.org/10.1007/BF01525171