Damage detection on laminated composite materials using several NDT techniques

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Amaro, AM (Author) Other; Reis, PNB (Author) Other; de Moura, MFSF (Author) FEUP; Santos, JB (Author) Other

Journal

Title: Insight

Vol. 54

Pages: 14-20

ISSN: 1354-2575

Publisher: British Institute of Non-Destructive Testing

Indexing

ISI Web of Knowledge - 31 Citations

ISI Web of Science

Scopus - 44 Citations

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

Other information

Authenticus ID: P-002-H57

DOI: 10.1784/insi.2012.54.1.14

Abstract (EN): The aim of this study is to evaluate the features and capabilities of four different methods when utilised to detect and quantify impact damage on composite laminates subjected to low-velocity impact. Carbon fibre-reinforced epoxy composite was used and the experimental tests were performed on [0,90,0,90](2s) and [90(4),0(4)](s) laminates using a drop-weight testing machine. The tests were performed with an impact energy of 3 J, corresponding to a maximum load of 3000 N. The damage in the laminates was analysed by electronic speckle pattern interferometry (ESPI), shearography, ultrasonic testing and X-radiography. All these techniques were able to detect almost all the defects, although the interferometric methods showed some limitations. X-radiography is an interesting alternative technique, but was not able to localise delaminations in the thickness direction. The ultrasonic methods, A-scan and C-scan, were shown to be the best solutions for inspecting the samples. According to the experimental results, these techniques were able to detect and measure the damage extent with great precision.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7