Crack Propagation in a Viscoelastic Lattice

                                   by

                 Leonid I. Slepyan, Tel Aviv University

                  JTB110,  3:30pm Thursday, May 21st, 1998

                                Abstract
A plane, periodic, square-cell lattice is considered, consisting
of point particles connected by viscoelastic bonds. Local-to-global  
energy-release-rate ratios, stress and strains of the breaking  
bonds as well as crack opening displacements are found. The 
influence of viscosity, the discrete structure, cell size and 
crack speed on the wave/viscous resistances to the crack propagation 
are revealed. Along with dynamic crack propagation, a theory for a 
slow crack is derived.

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