(1. 中南大學(xué) 粉末冶金國家重點(diǎn)實(shí)驗(yàn)室，長沙 410083；
2. 濟(jì)南大學(xué) 材料科學(xué)與工程學(xué)院，濟(jì)南 250022)
摘 要: 壓電纖維復(fù)合物在驅(qū)動(dòng)、傳感、結(jié)構(gòu)健康檢測等領(lǐng)域具有廣泛應(yīng)用，研究壓電纖維復(fù)合物的驅(qū)動(dòng)性能對于壓電纖維復(fù)合物實(shí)際應(yīng)用具有重要意義。通過實(shí)驗(yàn)研究不同驅(qū)動(dòng)電壓條件(峰值、頻率及偏置)對壓電纖維復(fù)合物懸臂梁結(jié)構(gòu)頂端位移的影響，探討懸臂梁基板材料與壓電纖維復(fù)合物驅(qū)動(dòng)性能的關(guān)系，基于歐拉-伯努利梁理論利用懸臂梁頂端位移計(jì)算壓電纖維復(fù)合物的驅(qū)動(dòng)力。結(jié)果表明：壓電纖維復(fù)合物的驅(qū)動(dòng)性能具有明顯的遲滯性。懸臂梁頂端位移的大小與驅(qū)動(dòng)電壓峰的峰值呈線性關(guān)系，且其不僅與驅(qū)動(dòng)電壓的峰值有關(guān)，還與驅(qū)動(dòng)電壓的偏置、頻率有關(guān)。壓電纖維復(fù)合物的驅(qū)動(dòng)性能隨基板不同而不同，其對剛性鋁板的驅(qū)動(dòng)力為5.2 mN，對柔性麥拉膜的驅(qū)動(dòng)力為0.2 mN。
關(guān)鍵字: 壓電纖維復(fù)合物；歐拉-伯努利梁；驅(qū)動(dòng)力；遲滯性；壓電陶瓷
（1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China
2. School of Materials Science and Engineering, Jinan University, Jinan 250022, China）
Abstract:The piezoelectric fiber composites have important application in the field of actuation, sensing, structural health monitoring and etc. It is important to study the actuation characteristics of piezoelectric fiber composites for a range of applications. The influences of driving voltage conditions (peak-to-peak voltage, frequency, bias) on the actuation characteristics of piezoelectric fiber composites were studied. The relationship between cantilever beam actuation performance of DFCs was investigated through the tip displacement of the cantilever, which was also used to calculate the blocking force based on Euler-Bernoulli beam theory. The results show that the hysteresis of piezoelectric fiber composite exists obviously. The tip displacement of the cantilever has a linear relationship with the driving voltage amplitude, and also is influenced by the driving voltage bias and frequency. The actuation characteristics of the piezoelectric fiber composites differ with different substrates. The blocking force for aluminum-based substrate is 5.2 mN, while it is 0.2 mN for mylar-based substrate.
Key words: piezoelectric fiber composites; Euler-Bernoulli beam; blocking force; hysteresis; piezoelectric ceramics
