Wang, Lu, Barber, & Thouless (WLBT, 2016) have written recently an interesting paper on the crack growth in visco-elastic and creeping materials, using a simple Maxwell "liquid" material, and the Double Cantilever Beam (DCB) model under pure moment. Using correspondence principle, they obtained an analytical solution for a viscoelastic beam on an elastic foundation, corresponding to a simple linear force-separation law for the cohesive law.
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