Borowiec Marek, Gawryluk Jaroslaw, Bochenski Marcin
Department of Applied Mechanics, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland.
Polymers (Basel). 2020 Dec 26;13(1):66. doi: 10.3390/polym13010066.
In this paper, the dynamical behavior of composite material is analyzed, including the energy harvesting effect. The composite is modeled by the Finite Element Method (FEM) and is made of pre-impregnate with a matrix of thermosetting epoxy resin reinforced with high-strength R-type glass fibers, and it is designed as a beam structure that is exposed to mechanical vibrations. The structure assumed the form of a beam with a substantially rectangular cross section. The couplings of motion occurring between mode shapes at properly selected fiber orientations are investigated. The beams with determined sets of composite layers and a coupling effect are used to recover electricity from the mechanical vibrations in the vicinity of the first resonance zone. The composite with a certain number of fiber glass layers has assumed an orientation relative to the beam axis. The new values found in this paper are the intensity of the coupling between the bending in the stiff and flexible directions of the beam for a chosen fiber layer stacking sequence. Additionally, the influence of layer configuration on the energy harvesting efficiency of the Macro-Fiber Composite (MFC) piezoelectric element is assessed.
本文分析了复合材料的动力学行为，包括能量收集效应。该复合材料采用有限元法（FEM）建模，由预浸料制成，基体为热固性环氧树脂，增强材料为高强度R型玻璃纤维，设计为承受机械振动的梁结构。该结构假定为具有大致矩形横截面的梁的形式。研究了在适当选择的纤维取向时振型之间发生的运动耦合。具有确定的复合层组和耦合效应的梁用于从第一共振区附近的机械振动中回收电能。具有一定数量玻璃纤维层的复合材料相对于梁轴具有特定取向。本文发现的新值是对于选定的纤维层堆叠顺序，梁的刚性和柔性方向弯曲之间的耦合强度。此外，评估了层配置对宏观纤维复合材料（MFC）压电元件能量收集效率的影响。
