Experimental studies on fatigue behavior of macro fiber composite (MFC) under mechanical loading

2016 ◽  
Author(s):  
Akash Pandey ◽  
A. Arockiarajan
Keyword(s):  
Mechanical Loading ◽  
Fiber Composite ◽  
Fatigue Behavior ◽  
Experimental Studies ◽  
Macro Fiber Composite

Long-term fatigue behavior of a cantilever piezoelectric energy harvester

2016 ◽  
Vol 28 (9) ◽  
pp. 1188-1210 ◽  
Author(s):  
Panduranga Vittal Avvari ◽  
Yaowen Yang ◽  
Chee Kiong Soh
Keyword(s):  
Energy Harvesting ◽  
Fiber Composite ◽  
Fatigue Behavior ◽  
Piezoelectric Energy Harvesting ◽  
Mean Square ◽  
Mean Square Deviation ◽  
Base Excitation ◽  
Dimensional Model ◽  
Piezoelectric Energy ◽  
Macro Fiber Composite

Piezoelectric energy harvesting has attracted extensive research in the advancement of new designs and techniques over the last decade. The cantilever shaped piezoelectric energy harvesting beam is one of the most employed designs, due to its simplicity and flexibility for further performance enhancement. The strain distribution along the cantilever piezoelectric energy harvesting beam is nonuniform, which would induce fatigue damage at the root of the cantilever on the long run. This particular issue has seldom been addressed in the literature. This article presents an experimental investigation on the fatigue behavior of a cantilever piezoelectric energy harvesting beam at different base excitation levels. The experimental study is augmented with analytical formulation to examine the strain levels and with finite element analysis formulation to model the piezoelectric energy harvesting beam with a macro fiber composite piezoelectric transducer. A two-dimensional model is developed based on the three-dimensional model to investigate crack propagation in the piezoelectric energy harvesting beam. Furthermore, the electromechanical impedance technique is employed to monitor the progression of damage in the experimental specimens. The root mean square deviation and relative root mean square deviation of the impedance values and voltage obtained from the macro fiber composite transducer provide a profound introspection into the damage propagation in the piezoelectric energy harvesting beam. This study provides an insight into the behavior of the piezoelectric energy harvesting beam undergoing fatigue loading due to a uniform sinusoidal base excitation by analyzing the output voltage, resonant frequency, tip displacement, tip velocity, and impedance variations. It will pave the way for future studies on the fatigue-based design guides for piezoelectric energy harvesting beams.

Macro-Fiber Composite Actuators for Flow Control of a Variable Camber Airfoil

2010 ◽  
Vol 22 (1) ◽  
pp. 81-91 ◽  
Author(s):  
Onur Bilgen ◽  
Carlos De Marqui ◽  
Kevin B. Kochersberger ◽  
Daniel J. Inman
Keyword(s):  
Flow Control ◽  
Fiber Composite ◽  
Macro Fiber Composite

Analysis of Wrinkled Membranes Bounded With Macro-Fiber Composite (MFC) Actuators

2010 ◽  
Author(s):  
Alireza Doosthoseini ◽  
Armaghan Salehian ◽  
Matthew Daly
Keyword(s):  
Finite Element ◽  
Fiber Composite ◽  
The Other ◽  
Horizontal Direction ◽  
Finite Element Code ◽  
Rectangular Shape ◽  
Macro Fiber Composite

In this paper we focus on a study which involves quantifying the effects of Macro Fiber Composite (MFC) actuators on the pattern and magnitude of wrinkles in a membrane when exposed to various loadings. An ABAQUS finite element code is employed for this research. The membrane in this study has a rectangular shape which is clamped at one edge and is free to move in the horizontal direction at the other edge. MFC actuators are bounded to the membrane to make a bimorph configuration.

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