摘要
提出了一个全新概念的压电陶瓷形状记忆合金(piezo-SMA)复合材料,作为一种新的驱动材料,它具有驱动速度快和应变大的特点。为了验证该观点,构造了一种基于Eshelby公式的新模型,在公式中运用了线性压电本构方程和SMA超弹性等式。由应力和电场诱发的应变,可产生两种简单的压电形状记忆合金(piezo-SMA)复合材料,一维串联模型和一维并联模型复合材料。该模型表明,一维并联强化结构提供的由偏应力和在其他复合结构的外加电场诱导下产生最高应变力。
A new concept of a piezoelectric ceramic/shape memory alloy（SMA） composite is proposed with aim of using this as a new actuator material with fast actuation speed and large strain.To prove the new concept,a new model is constructed based on Eshelby formulation where linear piezoelectric constitutive equations and bi-linear superelastic equations of SMA are used.The strain induced by applied stress and electric field are made for design of two simple piezo-SMA composites,that is 1-D series and 1-D parallel laminated composites.The proposed model indicated that the 1-D parallel reinforced structure can provide the highest strain induced under bias stress and applied electric field among other composite geometries.
出处
《压电与声光》
CSCD
北大核心
2013年第4期580-584,587,共6页
Piezoelectrics & Acoustooptics
