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Fabrication and Mechanical Behavior of Al/APC-2 Centrally Notched Nanocomposite Laminates at Elevated Temperature

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The Al/AS-4/PEEK (Al/APC-2) hybrid quasi-isotropic nanocomposite laminates were successfully fabricated first. 2024-T3 Al alloy sheets were 0.5 mm thick, APC-2 quasi-isotropic laminae were [0/±45/90]s eight layers, and the average diameter of nanoparticles SiO2 15±5 nm. Then, the panels were cut into samples and each sample was drilled a hole in the center of different diameters. Their mechanical responses were obtained by conducting tensile and cyclic tests at room and elevated temperatures. From the received data the longitudinal moduli are almost unchanged as temperature rising, and reduced less than 11% as the hole diameter increasing. However, the ultimate loads and nominal stresses decrease significantly as both the hole diameter increasing and temperature rising. At elevated temperature, the S–N curves go downwards as the hole diameter increasing. They are closely together for the normalized S–N curves, especially at 125 °C. Almost no delaminations were observed in both tests at elevated temperature and after a million cycles. A suitable model was proposed to analyze the responses of notched samples at elevated temperature. The predicted results were found in good agreement with the empirical data.
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Document Type: Research Article

Publication date: November 1, 2013

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  • ADVANCED SCIENCE LETTERS is an international peer-reviewed journal with a very wide-ranging coverage, consolidates research activities in all areas of (1) Physical Sciences, (2) Biological Sciences, (3) Mathematical Sciences, (4) Engineering, (5) Computer and Information Sciences, and (6) Geosciences to publish original short communications, full research papers and timely brief (mini) reviews with authors photo and biography encompassing the basic and applied research and current developments in educational aspects of these scientific areas.
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