The time dependence of shear strains and shear stresses due to creep and relaxation in adhesive bondlines of specimens with thick metal adherends was investigated at ambient temperature. The interpretation of the creep com pliance curves indicates a nonlinear viscoelastic behavior of the adhesive bondlines. Hence, simple spring dashpot models cannot properly describe the creep and relaxation of adhesives. For design purposes isochronous shear stress-strain curves are preferable as demonstrated for a typical lap joint.
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References
1.
Rutherford, J.L. and Hughes, E.J.Creep in Adhesive-Bonded Metal Joints. Adhesive Age, Nov. 1979, pp. 55-58.
2.
Althof, W. and Brockmann, W.New Test Methods for the Prediction of Environmental Resistance of Adhesive-Bonded Joint. SAMPE Vol. 21 ( 1976), pp. 581-591, Azusa, Cal. (USA).
3.
Althof, W.Progress in Structural Bonding Through Effective Bondline Stress Analysis . SAMPE Vol. 22 ( 1977), pp. 784-795, Azusa, Cal. (USA).
4.
Fluegge,W.Viscoelasticity. Blaisdell Publ. Comp.: Waltham, Mass.-Toronto- London (1967).
5.
Findley, W.N.Creep and Relaxation of Plastics. Machine Design, Vol. 32 (1960), 10, pp. 205-208.
