doi: 10.1080/00218468808071258pmid: N/A
Abstract This is a scanned image of the original Editorial Board page(s) for this issue.
Palley, Igor; Signorelli, Anthony J.
doi: 10.1080/00218468808071259pmid: N/A
Abstract There are several well-known methods for evaluating the level of fiber-to-matrix adhesion. For example, the single filament pull out test is the most direct way of measuring the level of the debonding strength. However, the method is not always applicable because Of fiber brittleness or the geometry and/or size of the fibers. Incorporation of fibers in a fiber/matrix composite and arranging the composite failure in such a way that fiberlmatrix debonding is the dominant failure mode is another well-known method for evaluating the interfacial adhesion level. The short beam shear method, popular because of convenience, is an example of this class of methods.
Ouezdou, Mongi Ben; Chudnovsky, Alexander; Moet, Abdelsamie
doi: 10.1080/00218468808071260pmid: N/A
Abstract A model to evaluate the Energy Release Rate (ERR) of adhesives using the Double Cantilever Beam (DCB) specimen is described. The model accounts for the adhesive bond thickness and its material properties. The analysis, considered as an improvement to the built-in cantilever beam model, treats the adherend as a finite beam which is partly free and partly supported by an elastic foundation and the adhesive bond as a thin strip under prescribed displacement. The results show significant effect of the adhesive parameters on the total ERR and that the built-in cantilever model underestimates the ERR. In general, the contribution of the adhesive bond to the ERR increases for softer adhesives, shorter cracks and thicker bonds.
Jozavi, Hooshang; Sancaktar, Erol
doi: 10.1080/00218468808071261pmid: N/A
Abstract A first order kinetic reaction model is utilized to model the cure process of epoxy adhesive Metlbond 1113. Actual states of full cure corresponding to a spectrum of cure temperature-time schedules are identified using the DTA method. Comparison of these experimental results with the corresponding theoretical predictions reveals that the first order kinetic reaction model provides accurate prediction of full cure when low temperature-long time schedules in close proximity to Tg are used. These cure schedules also result in the highest adhesive bulk tensile strength.
Dillard, John G.; Burtoff, Chuck; Buhler, Timothy
doi: 10.1080/00218468808071262pmid: N/A
Abstract Surfaces of commercial sheet molded composite (SMC) materials have been characterized by X-ray photoelectron spectroscopy (XPS) before and after various surface treatments. Surface treatments included cleaning with methylene chloride, abrasion using methylene chloride and a Scotch Brite ® abrasive pad, and application of an isocyanate primer. The pretreated SMC materials were bonded using a polyurethane adhesive. Bonded coupons were tested under a variety of conditions using the lap shear technique. Lap shear test results for specimens bonded following the abrasion and primer pretreatment indicated a favorable fracture force and mode of failure. Surface analysis studies were used to characterize the pretreated and failed surfaces.
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