Directionality detection of delaminations basing on analysis of CT slices using wavelet and Hough transforms-based algorithm

• Autorzy: Katunin A. , Wronkowicz A.

Warianty tytułu

PL

Wykrywanie kierunkowości delaminacji na podstawie analizy przekrojów CT z zastosowaniem algorytmu opartego na transformacji falkowej i Hougha

• Języki publikacji: EN

Abstrakty

EN

Growing demands for high reliability of constructions made of composite materials lead to a significant development of non-destructive testing methods of structural diagnostics. Among the most accurate and sensitive techniques used for analysis of internal defects, is the computed tomography (CT). However, since the results obtained from CT are highly precise, certain problems with their interpretation occur. The visual information about defects has isotropic character, thus it is not possible to evaluate directions of propagation of defects. The following study presents an investigation on a problem of identifying the directionality of delaminations evolution in layered composites. The tests were performed on specimens made of polymeric composites with delamination resulted from water-jet cutting. The images of cross sections of specimens were acquired by CT scanning. In the paper, the developed algorithm based on wavelet and Hough transforms as well as other methods of image processing and analysis is presented. The proposed method allows for automatic detection of directionality of delaminations and could be applied in quality control of composite components as well as non-destructive testing during their operation.

PL

Rosnące wymagania dotyczące wysokiej niezawodności konstrukcji wykonanych z materiałów kompozytowych prowadzą do znaczącego rozwoju metod badań nieniszczących przy diagnostyce strukturalnej. Jedną z najbardziej dokładnych i wrażliwych technik stosowanych do analizy defektów wewnętrznych jest tomografia komputerowa. Jednak, poza wysoką dokładnością wyników otrzymywanych tą metodą, istnieją pewne problemy z ich interpretacją. Informacja wizyjna o defektach ma charakter izotropowy, dlatego nie jest możliwa ocena kierunków propagacji defektów. Niniejsze studium przedstawia badania dotyczące problemu identyfikacji kierunkowości propagacji delaminacje w kompozytach warstwowych. Badania przeprowadzono na próbkach wykonanych z kompozytów polimerowych z delaminacją wynikającą z cięcia próbek strumieniem wody. Obrazy przekrojów próbek uzyskano z wykorzystaniem tomografii komputerowej. W niniejszym artykule przedstawiono algorytm oparty na transformacjach falkowej i Hougha oraz innych metod przetwarzania i analizy obrazów. Zaproponowana metoda pozwala na automatyczne wykrywanie kierunkowości delaminacji i mogłaby być zastosowana przy kontroli jakości elementów kompozytowych, jak i badań nieniszczących podczas ich eksploatacji.

Słowa kluczowe

EN

directionality detection; delamination; computed tomography; image processing; wavelet transform; Hough transform

PL

wykrywanie kierunkowości; delaminacja; tomografia komputerowa; przetwarzanie obrazów; transformacja falkowa; transformacja Hougha

• Wydawca: Polskie Towarzystwo Diagnostyki Technicznej
• Czasopismo: Diagnostyka
• Rocznik: 2015
• Tom: Vol. 16, No. 2
• Strony: 3--10
• Opis fizyczny: Bibliogr. 43 poz., rys.

Twórcy

autor

Katunin A.

• Institute of Fundamentals of Machinery Design, Silesian University of Technology, Konarskiego 18A, 44-100 Gliwice, Poland

autor

Wronkowicz A.

• Institute of Fundamentals of Machinery Design, Silesian University of Technology, Konarskiego 18A, 44-100 Gliwice, Poland

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