Wave Surfaces Due to Impact on Anisotropic Plates

Abstract

The stress waves induced in anisotropic plates by transverse, short- duration impact forces are examined in this report The anisotropy is related to the layup angles of the fibers of a fiber composite laminated plate. Using a modification of Mindlin's approximate theory of plates, it is shown that both extensional and bending waves are generated by transverse impact. The magnitudes of the wave velocities in different directions are calculated for graphite fiber-epoxy matrix plates for various layup angles. Finally, the shapes of the wave fronts or wave surfaces due to point impact are also presented for the cases mentioned.