Fabrication and mechanical properties of Ti/APC-2 hybrid nanocomposite laminates at elevated temperatures

Abstract

The Ti/APC-2 hybrid cross-ply nanocomposite laminates were successfully fabricated by the modified diaphragm curing process. The titanium thin sheets were surface treated by chromic acid anodizing to achieve superior bonding with APC-2 laminates. The nanoparticles SiO2 were uniformly spread on the interfaces of APC-2. The tensile tests at room and elevated temperatures were conducted to obtain the mechanical properties. It is interesting to find a knee point in each stress–strain curve. To predict and verify the feature of knee point the residual stresses and strains were calculated by simple methods. Adopting the residual stress effect and rule of mixtures, the analytical stress–strain curves at elevated temperatures were obtained. The data and mechanisms of the knee point in hybrid laminates were verified and highlighted. The predicted results of ultimate strength, longitudinal stiffness and the knee point are all in very good agreement with the experimental data.

Fatigue crack growth and delamination mechanisms of Ti/CFRP fibre metal laminates at high temperatures

“…Burianek et al predicted crack growth using the virtual crack closure technique (VCCT). Jen et al found that the maximum strain failure theory was not suitable for Ti/APC‐2 FMLs under high temperatures.…”

Title: Fatigue Crack Growth and Mechanical Behavior of Double-Edge-Cracked Ti/APC-2 Nanocomposite Laminates

“…Considering the metal alloys as cover sheets. Jen et al developed Mg/CF/PEEK nanocomposite laminates 1 as well as Ti/CF/PEEK nanocomposite laminates 2 and obtained their mechanical properties at elevated temperatures. AS-4/Polyether-etherketone (PEEK), called APC-2, thermoplastic composites were adopted, since PEEK polymer matrix can sustain its mechanical properties at temperatures up to 143°C 3 and offers excellent toughness properties.…”

Fatigue responses of cracked Ti/APC-2 nanocomposite laminates at elevated temperature

“…Vlot 4,5 investigated GLARE and ARALL and found that the impact resistance of FMLs was superior to that of the fiberreinforced plastic. Jen et al developed Magnesium/ carbon fiber (CF)/polyether-ether-ketone (PEEK) nanocomposite laminates 6 as well as Titanium/CF/ PEEK nanocomposite laminates 7 and obtained their mechanical properties at elevated temperatures.…”

“…Jen et al 10 developed a methodology to fabricate AS-4/PEEK aromatic polymer composite (APC-2)-nanocomposite laminates and found the optimal content of nanoparticles (SiO 2 ) was 1% by total weight. Jen et al 11 also fabricated the high performance Ti/APC-2 hybrid nanocomposite laminates to find the kink angle of Ti sheets in the stress vs. strain curves and the enhancement effect on mechanical properties by adding the optimal nanoparticles. Sutton and Varvani-Farahani 12 performed fatigue analysis on Al-Al 2 O 3 composite samples with different volume fractions of alumina particles.…”