Impact localization on a composite plate based on error outliers with Pugh’s concept selection

2018 ◽  
Vol 200 ◽  
pp. 449-465 ◽  
Author(s):  
Sang-Woo Kim ◽  
Hosung Jang
Keyword(s):  
Composite Plate ◽  
Concept Selection ◽  
Impact Localization

Composite plate low energy impact localization system based on FBG sensing network and hybrid algorithm

2015 ◽  
Vol 24 ◽  
pp. 84-88 ◽  
Author(s):  
Yaozhang Sai ◽  
Mingshun Jiang ◽  
Qingmei Sui ◽  
Shizeng Lu ◽  
Lei Jia
Keyword(s):  
Hybrid Algorithm ◽  
Composite Plate ◽  
Low Energy ◽  
Localization System ◽  
Energy Impact ◽  
Impact Localization

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.

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).

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.

FBG sensor array-based-low speed impact localization system on composite plate

2015 ◽  
Vol 63 (5) ◽  
pp. 462-467 ◽  
Author(s):  
Yaozhang Sai ◽  
Mingshun Jiang ◽  
Qingmei Sui ◽  
Shizeng Lu ◽  
Lei Jia
Keyword(s):  
Composite Plate ◽  
Sensor Array ◽  
Localization System ◽  
Low Speed ◽  
Fbg Sensor ◽  
Impact Localization
Sign in / Sign up

Export Citation Format

Share Document