FORCED VIBRATION OF AN INITIAL STRESSED RECTANGULAR COMPOSITE THICK PLATE WITH A CYLINDRICAL HOLE

Abstract

Within the framework of the Three-Dimensional Linearized Theory of Elastic Waves in Initially Stressed Bodies, the influence is studied of the initial stretching of a composite thick plate containing a cylindrical hole on the stress concentration around a hole caused by the action of the additional uniformly distributed dynamic (time-harmonic) normal forces on the upper face of the plane. The corresponding problem formulation is presented and, in order to find the solution to this problem, the finite element method is employed The numerical results on the concentration of the stress around the hole and the influence of the initial stretching on this concentration are presented According to these results, in particular It is established that the stress distributions around the cylindrical hole changed significantly with the initial stretching force.