Concept and Electro-elastic Modeling of Shear Actuated Fiber Composite using Micro-mechanics Approach
Concept and Electro-elastic Modeling of Shear Actuated Fiber Composite using Micro-mechanics Approach
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DOI：
10.1177/1045389x07084177
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发表时间：
2008-10
影响因子：
2.7
通讯作者：
S. Raja;T. Ikeda
中科院分区：
文献类型：
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作者：
S. Raja;T. Ikeda
剪切致动纤维复合材料（SAFC）的概念，可能会发现在结构驱动和健康监测任务的应用。SAFC的制造方面进行了简要讨论。采用均匀场模型研究了SAFC的电弹性行为。复合材料驱动器被建模为一个一般的层合板有七层，和有效的性能进一步评估使用剪切变形层合理论。考虑了纤维体积分数、纤维厚度、纤维取向等几何参数对SAFC性能的影响。据观察，更高的纤维厚度可以为SAFC致动器提供更好的剪切致动能力;但是顺应性要求对需要优化的纤维厚度带来约束。85-95%的纤维体积含量似乎为SAFC致动器提供了设计包络。SAFC已经显示出一个有前途的功能，同时耦合两个横向剪切应变，如果极化PZT纤维定向。因此，SAFC可用作扭转致动器，用于开发电弹性定制的智能层合或夹层结构。也可以预期，SAFC致动器可以提供一个更好的解决方案，主动气动弹性控制应用，扭转模式是至关重要的。
A Shear Actuated Fiber Composite (SAFC) concept is developed that may find application in structural actuation and health monitoring tasks. The fabrication aspects of SAFC are briefly discussed. A uniform field model is employed to study electro-elastic behavior of the SAFC. The composite actuator is modeled as a general laminate having seven layers, and the effective properties are evaluated further using shear deformation lamination theory. The geometric parameters such as fiber volume fraction, fiber thickness, and fiber orientation are considered, and their influence on the characteristics of SAFC is analyzed. It is observed that a higher fiber thickness may provide better shear actuation capability for the SAFC actuator; but conformability requirements bring a constraint on fiber thickness that needs to be optimized. A fiber volume content of 85—95% appears to provide a design envelope for the SAFC actuator. SAFC has shown a promising feature of simultaneously coupling both transverse shear strains, if the poled PZT fibers are oriented directionally. Therefore, SAFC can be used as a torsional actuator for developing electro-elastically tailored smart laminated or sandwich structures. It is also expected that the SAFC actuator may provide a better solution for active aeroelastic control applications, where torsion mode is critical.