冲击载荷下压电双稳态层合板瞬态响应

Transient response of piezoelectric bi-stable laminates under impact load

从理论上研究了中心固支边界下含压电材料层双稳态碳纤维复合材料层合板在受到冲击载荷后的机电响应。以含17个未知参数的假设位移场为基础,利用一阶剪切变形理论得到应变位移关系。根据能量原理,通过拉格朗日方程得到系统的机电运动方程,分别研究了系统在受到突加载荷、递增载荷、正弦载荷、空气爆炸载荷等瞬态冲击下的机电响应。研究结果显示,跳变现象的产生与外力功输入大小密切相关,跳变产生的瞬时电压幅值约为未跳变的10倍。

The electromechanical response of bi-stable carbon fiber composite laminates containing piezoelectric material layers under a centrally solidly supported boundary was theoretically investigated after being subjected to an impact load.Based on a hypothetical displacement field containing 17 unknown parameters,the strain-displacement relationship was obtained by using the first-order shear deformation theory.According to the energy principle,the electromechanical motion equation of the system was obtained by the Lagrange equation,and the electromechanical response of the system under the transient impact of sudden load,incremental load,sinusoidal load and air explosion load were studied,respectively.The results show that the snap-through phenomenon is closely related to the input of external work,and the instantaneous voltage amplitude generated by the snap-through is about 10 times that of the non-snap-through.