Abstract

An infinitely long elastic plate is under compression and adhering to a flat rigid base. Many studies have investigated such a layer with a pre-existing flaw in the bond (i.e. an initially de-bonded region) which may then lead to buckling and possibly to delamination. The present investigation considers the possibility of spontaneous de-bonding and simultaneous buckling, followed by delamination, in an initially homogeneous stress field without a pre-existing flaw. It is shown that a sufficiently large pre-stress can lead to this sequence of events. This limiting pre-stress depends on the plane strain elastic modulus, the layer thickness and the stiffness characteristic of the adhesion law. These results lead to theoretical limits on the pre-stress for the prevention of de-bonding, buckling and subsequent delamination under ideal bond conditions.

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