Nonlinear Mechanical Modeling For Axial Compression Cantilever Macro-Fiber Composite Bimorph

The traditional lead zirconate titanate ceramic (PZT) bimorph deformation is small, it is difficult to be used as MAV morphing wing actuator. Thus, a cantilever axial compression macro-fiber composite (MFC) bimorph is proposed in this paper. Firstly, the theoretical model and linear finite element method (FEM) model of MFC bimorph are established based on the homogenization parameters of MFC. The inactive part of MFC and nonlinear tensile stiffness of MFC are unconsidered in these models. Then, the nonlinear tensile stiffness of MFC is introduced into the FEM model of whole bimorph to obtain the deformation characteristics and design space. The result shows that the free end displacement of 12.7 mm can be achieved in the case of the driving voltage of 1440/-480V with the axial compressed force of 8 N, which is three times larger than the same bimorph without axial compressed force. The corresponding design space has been expanded three times.