Author(s)

M. El-Raheb & R. Tham

Abstract

Transient waves were initiated by allowing a thick PMMA disk to strike a periodic stack of ceramic layers bonded by thin weak silicone rubber layers. Pressure at interfaces of ceramic and bond layers was measured by carbon gauges along the centerline of the stack. Comparison of experimental histories with those from a 1-D analysis (JASA 94(1), 1993) and a 2-D axisymmetric analysis reveals that the waves propagate two-dimensionally and that flexure of the ceramic layers controls attenuation and shape of compressive wave of first arrival. Visco-elasticity of the bond material sharply reduces tensile stresses. 1 Experiment Transient stress waves were initiated in a weakly coupled periodic stack of square Aluminum Nitride (A1N) ceramic tiles 10.16 cm in size, bonded by a

Keywords