Modelling a crack using Abaqus

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In many cases it is important to know whether a crack will propagate. Simulating this requires special techniques, especially for sharp cracks. In a perfectly sharp crack, loading is applied to a single point, causing a singularity with an infinitely large stress. In a simulation it is not possible to obtain an infinitely large stress. The loading will be localised in a single element and therefore the results will depend strongly on the mesh, which is unwanted. In the real world, perfectly sharp cracks do not exist; a crack will always have a finite thickness.

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