The influence of external tensile stress on surface elastic waves on piezoelectric ceramic plates

Experimental results on the output voltage via a propagating surface elastic wave and the convolution output of two oppositely propagating surface elastic waves on a piezoelectric ceramic plate are described as a function of external tensile stress. The convolution output increases with the cummulative load, while the output voltage via the surface elastic wave decreases. The variation of the output voltage is considered to be due to the change in nonlinearity that arises from the external load.