Abstract
The transient elastodynamic stress intensity factor was determined for a cracked linearly viscoelastic body under impact loading. Two separate geometries along with associated loading conditions were considered. In the first case, the body is in the form of an infinite strip containing a central finite-length crack and is subjected to anti-plane shear tractions. Various strip heights are considered including the possibility of a body of nearly infinite extent. In the second case, the body is of infinite extent containing a finite-length penny-shaped crack and is subjected to radial shear and torsional (twisting) tractions. The analytical parts of the solutions are either given by a previous analysis of H. G. Georgiadis or are obtained from results by G. C. Sih through the use of the correspondence principle. The numerical procedure consists of solving integral equations and then inverting the Laplace transformed solution by the Dubner-Abate-Crump technique. Numerical results were given for the standard linear solid by considering several combinations of material constants.
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