Impact of Torsional Load on a Penny-Shaped Crack in an Elastic Layer Sandwiched Between Two Elastic Half-Space

Sudden impact of torsional load on a penny-shaped crack in an elastic layer sandwiched between two elastic half-spaces has been analyzed in this paper. The axi-symmetric mixed boundary value problem is reduced to the problem of solving a pair of dual integral equations by using Hankel and Laplace transforms. The problem is further reduced to Fredholm integral equation of second kind which is solved numerically. Taking numerical inversion of Laplace transform, stress intensity factor at the tip of the crack is calculated and plotted for different values of the parameters.