Propagation of Discontinuities in Heterogeneous Anisotropic Plates.

摘要

Elastic stress waves propagating in thin,laminated composite plates are analyzed on the basis of a lamination theory. The theory is based on the Kirchhoff assumptions,but it includes the effects of shear deformation and rotary inertia,similar to Mindlin's theory for homogeneous isotropic plates. The individual layers comprising the plate are assumed to possess different thicknesses and material properties. In particular,each layer may be arbitrarily anisotropic. Thus, a general coupling in shear,bending,twisting and extensional effects is present in the plate constitutive relations. This coupling results in simultaneously coupled stress waves propagating in the plane of the plate. Several numerical examples involving laminated fiber-reinforced composite plates are presented. (Author)