Abstract
Abstract
Stress intensity factors are found for cracks arising in an elastic layer, perfectly bonded to an elastic substrate and propelled by surface contact loading, in a range of different distributions. In each case the loading is normal or very nearly normal, with only a modest frictional shearing force present. It is shown that the most favoured regions for crack growth, i.e. where tension occurs, are adjacent to the interface (at 45°) and normal to the free surface, based on the assumption that cracks grow mainly in mode I.
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