论文部分内容阅读
The non-linear behaviour of PZT-5 ceramics under coupled electrical-mechanical loading (Es and σ11 ) is experimentally studied. The effect of different levels of compressive stress on the electrical-mechanical response is examined. With the increase of compressive stress, shapes of the electric hysteresis loop and the butterfly curve are slightly changed, while the reversed butterfly curve (ε11 vs E3) varies significantly, and the value of the piezoelectric constant d31 decreases evidently. Based on these experimental results, a simple design is proposed to improve the sensitivity and reliability of the submarine detectors and sensors.