Manufacturing and mechanical response of nanocomposite laminates

• Published in: Composites science and technology 2005-04, Vol.65 (5), p.775-779
• Main Authors: Jen, Ming-Hwa R., Tseng, Yu-Chung, Wu, Chun-Hsien
• Format: Article
• Language: English
• Subjects: Applied sciences; B. Fatigue; B. Mechanical properties; B. Strength; C. Laminates; Exact sciences and technology; Forms of application and semi-finished materials; Laminates; Nanoparticles; Polymer industry, paints, wood; Technology of polymers
• ISSN: 0266-3538; 1879-1050
• DOI: 10.1016/j.compscitech.2004.10.010

A newly developed methodology is proposed first to manufacture AS-4/PEEK APC-2 nano-composite laminates. The improvement of mechanical properties of nano-laminates is verified by a series of testings systematically. The achievement of empirical results is highlighted as follows. From tensile tests it is found that the optimal content of nanoparticles (SiO 2) is 1% by total wt. The ultimate strength increases about 12.48% and elastic modulus 19.93% in quasi-isotropic nano-laminates. Whilst, the improvement of cross-ply nano-composite laminates is less than that of quasi-isotropic laminates. At elevated temperatures the ultimate strength decreases slightly below 75 °C and the elastic modulus reduces slightly below 125 °C, however, both properties degrade highly at 150 °C (≈ T g) for two layups generally. Finally, after the constant stress amplitude tension–tension (T–T) cyclic testing, it is found that both the stress-cycles (S–N) curves are very close below 10 4 cycles for cross-ply laminates w/wo nanoparticles, and the S–N curve of nano-laminates slightly bent down after 10 5 cycles. Whilst in quasi-isotropic laminates, the S–N curve of nano-laminates is always slightly below that of APC-2 laminates through the life.