This paper presents a novel approach for improving the reliability and driving capability of piezoelectric actuators by developing braided fiber piezoelectric composite (BFPC) actuators. The nonlinear analysis of laminated beams integrated with the BFPC actuators under electric load is presented. According to Timoshenko beam theory and von Kármán nonlinear geometric relation, the strain components of the piezoelectric laminated beams are obtained. The nonlinear governing equations of the piezoelectric laminated beams are derived by the Galerkin method and principle of minimum potential energy, and then are solved through the direct iterative method. The accuracy of this method is demonstrated by its comparison with the published results. The driving capability of the BFPC actuator and the existing piezoelectric composite actuator is compared. The influences of the fiber volume fraction, actuator thickness, simply supported beam thickness and applied voltage on the driving capability of the BFPC actuators are discussed through a comprehensive parametric study. The numerical results illustrate that the BFPC actuators with excellent driving capability can effectively control the deformation of smart structures.

中文翻译：

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带编织纤维压电复合驱动器的叠层梁非线性分析

本文提出了一种通过开发编织纤维压电复合材料 (BFPC) 致动器来提高压电致动器的可靠性和驱动能力的新方法。提出了与BFPC 执行器集成的叠层梁在电负载下的非线性分析。根据Timoshenko梁理论和von Kármán非线性几何关系，得到压电叠层梁的应变分量。利用Galerkin方法和最小势能原理推导出压电叠层梁的非线性控制方程，然后通过直接迭代法求解。该方法的准确性通过与已发表结果的比较来证明。比较了BFPC致动器与现有压电复合致动器的驱动能力。通过综合参数研究讨论了光纤体积分数、致动器厚度、简支梁厚度和施加电压对 BFPC 致动器驱动能力的影响。数值结果表明，具有优异驱动能力的BFPC执行器可以有效控制智能结构的变形。