Title: Fatigue Crack Growth and Mechanical Behavior of
Double-Edge-Cracked Ti/APC-2 Nanocomposite Laminates
Abstract
The mechanical properties and fatigue responses of double-edge-cracked
Ti/APC-2 hybrid nano-composite laminates by tensile and cyclic tests
were obtained. The double-edged cracks were cut with the crack lengths
of 2.0 mm and 3.0 mm symmetrically and anti-symmetrically. The
mechanical properties of symmetrically cracked samples are more
detrimentally than those of anti-symmetrically counter parts. The
greater the cracked angles, the greater the maximum load, however, the
results of crack lengths were on the contrary. The fatigue life
increased with the crack angle increasing, and also decreased with the
crack length increasing. The enhancement of laminates by adding
nano-powder did improve the fatigue life and maximum load, but not
significantly. It is attributed to the local stress intensity factors at
the crack tips mainly dominating the mechanical properties. Hence, the
spreading of nano-power at the interface does not effectively strengthen
the resistance to fatigue and fracture globally.