Acoustic waves in rubberlike layered media

The paper focuses on the propagation of 1-D acoustic waves in an elastic isotropic material with the elastic potential proposed by Blatz and Ko [1]. Two special models of materials are described by this potential: foamed polyurethane elastomers and solid polyurethane rubbers. The problem of reflection and transmission of 1-D acoustic waves at the interface of two different media and the problem of multiple reflections in an elastic layer of finite length bounded by two elastic half spaces are discussed. The standard procedure for the linearisation of equations of motion was used. This approach is based on the assumption that small, time-dependent motions are superimposed on large static deformations.