ONE-DIMENSIONAL PREDICTION OF THE ACOUSTIC WAVES GENERATED IN A MULTILAYER VISCOELASTIC BODY BY MICROWAVE IRRADIATION

A one-dimensional method to predict the acoustic waves generated by a rapid thermal expansion in a multilayer viscoelastic body (rod or plate) is presented. In particular, the method can predict the acoustic waves generated by microwave irradiation. The temperature rise in each layer is assumed to be known. The solution is validated experimentally with a rod made with two different materials and irradiated by a pulsed microwave. An example of application is given in the case of the acoustic wave generation in a metallic medium by means of the microwave irradiation of an absorbing layer.