Abstract
Dynamic photoelasticity was used to study the stresses when an impulse wave propagates through a single lap joint. An explosive was detonated in one of the adherends. The resulting stress wave propagated down the adherend and through the joint area. At the junction between the adherends, the stress wave interacted with the ends of the adherends and significant changes in the stress wave occurred. The stress wave then propagated through the joint and, in doing so, interacted with the two square corners at the adhesive/adherend interface. It was found that a significant biaxial tensile stress occurs at one of the corners.
With only the usual black and white photographs, the ordering and interpretation of the photoelastic-fringe orders was difficult. The paper indicates how color photographs were used to simplify identification of the fringes.
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Zachary, L.W., Burger, C.P. Dynamic wave propagation in a single lap joint. Experimental Mechanics 20, 162–166 (1980). https://doi.org/10.1007/BF02327119
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DOI: https://doi.org/10.1007/BF02327119