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Ultrasonic non-destructive testing of plate-like structures using piezoelectric arrays transducers

Grant number: 10/16400-0
Support type:Scholarships in Brazil - Doctorate (Direct)
Effective date (Start): March 01, 2011
Effective date (End): September 30, 2014
Field of knowledge:Engineering - Electrical Engineering - Electrical, Magnetic and Electronic Measurements, Instrumentation
Principal researcher:Ricardo Tokio Higuti
Grantee:Vander Teixeira Prado
Home Institution: Faculdade de Engenharia (FEIS). Universidade Estadual Paulista (UNESP). Campus de Ilha Solteira. Ilha Solteira , SP, Brazil
Associated scholarship(s):13/00330-0 - Beamforming for ultrasonic array imaging of plate structures using lamb waves, BE.EP.DD

Abstract

This plan proposes the study and implementation of non-destructive testing techniques of plate-like structures using piezoelectric arrays transducers and guided acoustic waves, associated with image formation and compounding methods. Damage detection in structures using guided waves and arrays is a relatively new and promising research area, specially in the aerospace and energy fields, where the use of plate-like structures, often with composite materials, demands thorough inspection due to the high safety levels of operation. Guided acoustic wave techniques can be used to inspect relatively large areas without the necessity of moving the transducers, in a non-destructive way. Furthermore they can be tuned to be sensitive to specific types of defects, like notches, delamination, surface defects. Wave propagation, interaction with defects and modes of propagation and dispersion characteristics will be studied. Finite element simulation using the software PZFlex will be used to get further insight in the theoretical aspects, and will be important as a virtual prototyping tool and to obtain dispersion curves, interaction with defects and array response. Experimental analysis will validate the simulations with isotropic materials. An important aspect of the project will be the study and implementation of piezoelectric array transducers and image formation techniques, which will be used to damage detection and characterization. The possible geometries and distribution of transducers (linear and sparse), number of elements and different apodizations with image compounding and signal processing techniques will be explored to improve the image with respect to contrast and resolution. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
PRADO, VANDER TEIXEIRA; HIGUTI, RICARDO TOKIO; KITANO, CLAUDIO; MARTINEZ-GRAULLERA, OSCAR. Instantaneous Phase Threshold for Reflector Detection in Ultrasonic Images. IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL, v. 61, n. 7, p. 1204-1215, JUL 2014. Web of Science Citations: 4.
PRADO, VANDER T.; HIGUTI, RICARDO T.; KITANO, CLAUDIO; MARTINEZ-GRAULLERA, OSCAR; ADAMOWSKI, JULIO C. Lamb mode diversity imaging for non-destructive testing of plate-like structures. NDT & E INTERNATIONAL, v. 59, p. 86-95, OCT 2013. Web of Science Citations: 25.
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
PRADO, Vander Teixeira. Ultrasonic non-destructive testing of plate-like structures using piezoelectric array transducers = Ensaios não-destrutivos por ultrassom de estruturas tipo placa utilizando arrays de transdutores piezelétricos. 2014. Doctoral Thesis - Universidade Estadual Paulista "Júlio de Mesquita Filho" Faculdade de Engenharia (Campus de Ilha Solteira)..

Please report errors in scientific publications list by writing to: cdi@fapesp.br.