scholarly journals Experimental and Theoretical Investigations of the Impact Localization of a Passive Smart Composite Plate Fabricated Using Piezoelectric Materials

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
M. M. S. Dezfouli ◽  
Mohd Roshdi Hassan ◽  
Mohd Hafidz Ruslan ◽  
Sohif Mat ◽  
B. Bakhtyar
Keyword(s):  
Composite Plate ◽  
Piezoelectric Materials ◽  
Low Cost ◽  
Composite Plates ◽  
Smart Composite ◽  
Impact Location ◽  
Theoretical Investigations ◽  
Cartesian Coordinate ◽  
The Impact ◽  
Impact Localization

Two passive smart composite plates are fabricated using one and two PZT patches that are cheaper than the PZT wafer. The composite plate is fabricated in low temperature through the hand lay-up method to avoid PZT patch decoupling and wire spoiling. The locus of the impact point is identified using the output voltage to identify the impact location using one sensor. The output voltages of the sensors are analyzed to identify the impact location using two sensors. The locations of the impacts are determined based on the crossing points of two circles and the origin of an intended Cartesian coordinate system that is concentric with one of the sensors. This study proposes the impact location identification of the passive smart composite using the low-cost PZT patch PIC155 instead of common embedded materials (wafer and element piezoelectric).

Detection of Impact Location for Composite Stiffened Panel Using FBG Sensors

2010 ◽  
Vol 123-125 ◽  
pp. 895-898 ◽  
Author(s):  
Sang Oh Park ◽  
Byeong Wook Jang ◽  
Yeon Gwan Lee ◽  
Yoon Young Kim ◽  
Chun Gon Kim ◽  
...  
Keyword(s):  
Signal Processing ◽  
Noise Level ◽  
Composite Plate ◽  
Composite Plates ◽  
Stiffened Panel ◽  
Arrival Times ◽  
Fbg Sensor ◽  
Composite Stiffened Panel ◽  
Fbg Sensors ◽  
The Impact

We carried out experiments to detect impact locations on a composite plate using two types of composite plates, a composite flat plate with a constant thickness of 5 mm and a composite stiffened panel with stringers. Four multiplexed FBG sensors were attached to the bottom surface of the composite plates to acquire impact signals. The FBG sensor wavelength shift data were collected at a sampling frequency of 40 kHz using a high-speed FBG interrogator (SFI-710, Fiberpro Inc., Korea). The arrival times of the impact signals at each FBG sensor were obtained using a signal processing procedure. The arrival times were affected by noise level and signal-to-noise ratio. In order to overcome this weakness, signal processing techniques such as wavelet decomposition, normalization using each noise level and filtering with a moving average were adopted. To calculate the impact locations of the composite plate, a neural network algorithm was applied.

Impact Localization on a Composite Plate With Unknown Material Properties Using PWAS Transducers and Wavelet Transform

2017 ◽  
Author(s):  
Asaad Migot ◽  
Victor Giurgiutiu
Keyword(s):  
Wavelet Transform ◽  
Nonlinear Equations ◽  
Material Properties ◽  
Composite Plate ◽  
Linear Equations ◽  
Active Sensors ◽  
Piezoelectric Wafer Active Sensors ◽  
Piezoelectric Wafer ◽  
The Impact ◽  
Impact Localization

In this work, an impact experiment on a composite plate with unknown material properties (its group velocity profile is unknown) is implemented to localize the impact points. A pencil lead break is used to generate acoustic emission (AE) signals which are acquired by six piezoelectric wafer active sensors (PWAS). These sensors are distributed with a particular configuration in two clusters on the plate. The time of flight (TOF) of acquired signals is estimated at the starting points of these signals. The continuous wavelet transform (CWT) of received signals are calculated with AGU Vallen wavelet program to get the accurate values of the TOF of these signals. Two methods are used for determining the coordinates of impact points (localization the impact point). The first method is the new technique (method 1) by Kundu. This technique has two linear equations with two unknowns (the coordinate of AE source point). The second method is the nonlinear algorithm (method 2). This algorithm has a set of six nonlinear equations with five unknowns. Two MATLAB codes are implemented separately to solve the linear and nonlinear equations. The results show good indications for the location of impact points in both methods. The location errors of calculated impact points are divided by constant distance to get independent percentage errors with the site of the coordinate.

Analytical modeling of laminated composite plates integrated with piezoelectric layer using Trigonometric Zigzag theory

2020 ◽  
Vol 54 (29) ◽  
pp. 4691-4708
Author(s):  
Aniket Chanda ◽  
Rosalin Sahoo
Keyword(s):  
Transverse Shear ◽  
Piezoelectric Layer ◽  
Composite Plate ◽  
Laminated Composite ◽  
Composite Plates ◽  
Solution Technique ◽  
Shear Stresses ◽  
Smart Composite ◽  
Laminated Composite Plate ◽  
Zigzag Theory

The analytical solution for static analysis of laminated composite plate integrated with piezoelectric fiber reinforced composite actuator is obtained using a recently developed Trigonometric Zigzag theory. The kinematic field consists of five independent field variables accommodating non-linear variation of transverse shear strains through the thickness of the laminated composite plate. The principle of minimum potential energy is adopted to derive the governing equations of equilibrium. Navier’s solution technique is employed to convert the system of coupled partial differential equations into a system of algebraic equations. The electric potential is assumed to vary linearly through the thickness of the piezoelectric layer. The analytical formulation also does not include voltage as an additional primary variable. The response in the form of deflection and stresses are obtained for smart composite plates subjected to electro-mechanical loads and compared with the elasticity solutions and available results reported by other researchers in the existing literature. The transverse shear stresses are accurately determined by an efficient post-processing technique of integrating the equilibrium equations of elasticity. Parametric studies on actuation in the response of the smart composite plate are also presented graphically in order to have a clear understanding of the static behavior.

Forced Vibration Responses of Smart Composite Plates using Trigonometric Zigzag Theory

2021 ◽  
pp. 2150067
Author(s):  
Aniket Chanda ◽  
Rosalin Sahoo
Keyword(s):  
Forced Vibration ◽  
Piezoelectric Materials ◽  
Composite Plates ◽  
Solution Technique ◽  
Integration Scheme ◽  
Shear Stresses ◽  
Smart Composite ◽  
Plate Structure ◽  
Vibration Responses ◽  
Zigzag Theory

The Trigonometric Zigzag theory is utilized in this research for analytically evaluating the forced vibration responses of smart multilayered laminated composite plates with piezoelectric actuators and sensors. This theory, as the name suggests, incorporates a trigonometric function, namely the secant function for describing the nonlinear behavior of transverse shear stresses through the thickness of the smart composite plates. The kinematics for the in-plane displacement components are obtained by superposing a globally varying nonlinear field through the thickness of the plate structure on a piecewise linearly varying zigzag field with slope discontinuities at the layer interfaces. The model also satisfies the inter-laminar continuity conditions of tractions at the interfaces of the multilayered plate. The equations of motion are derived using Hamilton’s principle, and the separation of the variables technique is extended to assume the solutions for the primary variables in space and time and solved analytically using Navier’s solution technique along with Newmark’s time integration scheme. A detailed analytical investigation of the dynamic behavior of the smart laminated plate coupled with piezoelectric materials like PVDF and piezoelectric fiber-reinforced composite (PFRC) is carried out by considering several forms of the time-dependent electromechanical excitations and also covering different geometrical and material features of the smart plate structure. The responses are found to be in close agreement with the elasticity solutions and some new results are also presented to show the dynamic controlling capacity of the piezoelectric layers.

Impact Localization System by Using FBG Sensors and Extreme Learning Machine Algorithm

2015 ◽  
Vol 740 ◽  
pp. 664-667
Author(s):  
Ming Shun Jiang ◽  
Xiang Yang Li ◽  
Shi Cheng Wang ◽  
Shi Zeng Lu ◽  
Yin Qing ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Extreme Learning Machine ◽  
Time Difference ◽  
Localization System ◽  
Impact Location ◽  
Fbg Sensors ◽  
Learning Machine ◽  
The Impact ◽  
Impact Localization ◽  
Signal Time

Aluminum alloy structure impact localization system by using fiber Bragg grating (FBG) sensors and impact localization algorithm were investigated. The impact localization method was proposed based on Extreme Learning Machine (ELM). Cross-correlation analysis method was used to extract the impact signal time difference. And ELM was used to realize impact localization. ELM model’s input was signal time difference and the output was the impact location. At last, FBG impact localization system was established. In aluminum alloy plate’s 500mm*500mm*2mm experiment area, the FBG impact localization system was used to identify the impact location. The experimental results showed that the impact location abscissa and ordinate localization errors were both less than 10mm. The research results provided an alternative method for the aluminum alloy material structure impact localization.

scholarly journals Experimental Investigation of Impact Localization in Composite Plate Using Newly Developed Imaging Method

2018 ◽  
Author(s):  
Mohammad Faisal Haider ◽  
Asaad Migot ◽  
Md Yeasin Bhuiyan ◽  
Victor Giurgiutiu
Keyword(s):  
Composite Plate ◽  
High Energy ◽  
Temperature Cycle ◽  
Imaging Method ◽  
Impact Event ◽  
Scanning Method ◽  
Time Frequency ◽  
Energy Impact ◽  
The Impact ◽  
Impact Localization

This paper focused on impact localization of composite structures, which possess more complexity in the guided wave propagation because of the anisotropic behavior of composite materials. In this work, a composite plate was manufactured by using a compression molding process with proper pressure and temperature cycle. Eight layers of woven composite prepreg were used to manufacture the composite plate. A structural health monitoring (SHM) technique is implemented with piezoelectric wafer active sensors (PWAS) to detect and localize the impact on the plate. There are two types of impact event are considered in this paper (a) low energy impact event (b) high energy impact event. Two clusters of sensors recorded the guided acoustic waves generated from the impact. The acoustic signals are then analyzed using a wavelet transform based time-frequency analysis. The proposed SHM technique successfully detect and localize the impact event on the plate. The experimentally measured impact locations are compared with the actual impact locations. An immersion ultrasonic scanning method was used to visualize the composite plate before and after the impact event. A high frequency 10 MHz 1-inch focused transducer was used to scan the plate in the immersion tank. Scanning results show that there is no visible manufacturing damage in the composite plate. However, clear impact damage was observed after the high-energy impact event.

scholarly journals Shape Memory Alloy Hybrid Composites for Improving Impact Properties

2021 ◽  
pp. X
Author(s):  
Chuanliang SHEN ◽  
Xiaodong XU ◽  
Xiaoyu MA ◽  
Yibo HU ◽  
Shan ZHANG ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Composite Plate ◽  
Hybrid Composites ◽  
Mechanical Energy ◽  
Impact Resistance ◽  
Composite Plates ◽  
Impact Response ◽  
Impact Properties ◽  
The Impact

This paper investigates the method to improve the property that can decrease the impact response of composite plate. Embedding the super-elastic shape memory alloy wires into composite plates has increased the attention of material researchers. Super-elastic shape memory alloy has the properties of absorbing mechanical energy, large recoverable deformation and so on. In this study, experiments were conducted to analyze the impact properties of composite plates with Ni-Ti SMA wires. Composite plates with Ni-Ti SMA wires and without Ni-Ti SMA wires were subjected to two impacts respectively. This study measured the responses of two impacts. The results showed that the composite plate with Ni-Ti SMA wires were subjected to a second impact with a peak deflection of 5.47 mm, which was only 0.22 mm larger than the first impact. The relevant data of the composite plate without Ni-Ti SMA wires were 9.02 mm, 1.22 mm, and serious damage occurred. It was verified that the Ni-Ti SMA wires improved the impact resistance of the composite plate. After studying the impact tests of variable diameters of SMA wires embedded at the low layer of composite plate, it was shown that as the diameter of SMA wires increased, the impact resistance of composite plates was improved.

Wave-based impact localization on laminated composite plates using a coarse network of sensors

2019 ◽  
Vol 18 (5-6) ◽  
pp. 2040-2055
Author(s):  
Theodosis C Theodosiou ◽  
Christoforos S Rekatsinas ◽  
Christos V Nastos ◽  
Dimitris A Saravanos
Keyword(s):  
Laminated Composite ◽  
Composite Plates ◽  
Wave Dispersion ◽  
Laminated Plates ◽  
Accurate Estimation ◽  
Frequency Content ◽  
Laminated Composite Plates ◽  
Impact Site ◽  
The Impact ◽  
Impact Localization

This article demonstrates a methodology for the detection of foreign object impact locations on laminated composite plates using a low number of sensors. The proposed approach exploits the wave-dominated transient response of the target structure and addresses the challenges induced by the non-uniform wave propagation due to the anisotropy of composite plates on the impact localization. Captured sensor signals are processed and their frequency content is identified. Semi-analytical wave dispersion models and time-domain spectral finite element impact models encompassing the effects of laminate anisotropy on wave dispersion characteristics are employed to extract the wave velocity from their frequency content. The method for localizing the impact site is formulated as an optimization problem and involves signal correlation from different sensors, refinement of the candidate locations, and finally accurate estimation of the impact site. Numerical and experimental validations of the developed method are presented for low-velocity impacts on glass/epoxy laminated plates.

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