A STUDY ON TORSION OF A NONLINEAR VISCOELASTIC SLAB ABOUT NONCOINCIDENT AXES

In this work, the torsion of a non-linear viscoelastic slab between tw o infinite plates about non-coincident axes, where the top and the bot tom boundary surfaces are bounded to rigid plates, is studied. The bou ndary-initial value problem is formulated and is solved numerically, w ith deformation prescribed at boundaries. The numerical procedure is s uch that at each time step, the problem is equivalent to a system of t hree coupled non-linear partial integro-differential equations for tim e and the displacement functions.