DYNAMIC INTERACTION OF A PLATE AND AN IMPACTOR

The interaction of an impactor and a clamped, anisotropic plate at low velocities is studied. A series expansion for the plate deflection is assumed and the equations of motion are derived from the Lagrangian o f the system. The resulting system of equations is solved using Newmar k's beta-method. Large plate deflections are taken into account by app lying von Karman's equations for the strain components. Contact forces between impactor and plate and the center deflection of tile plate ar e calculated for various isotropic and orthotropic plates and are comp ared to literature values. Finally the model was used to check the for ce-time curve of an impacted CFRP-facesheet that was recorded in the c ourse of the material qualification of a satellite-carrier structure.