The SCG parameters were determined using the ratio of inert strength Weibull modulus to lifetime Weibull modulus. ![]() All tests were performed using a fully articulated four-point flexure fixture in deionized water at 37 ☌. Additional polished specimens were subjected to cyclic loading at two frequencies, 2 Hz ( N = 44) and 10 Hz ( N = 36), and at various stress amplitudes. Two groups of specimens ( N = 30/group) with polished (15 μm) or air-abraded surface were tested under rapid monotonic loading. Rectangular beam specimens were fabricated using the lost-wax process. ![]() ![]() The objective of this study was to test the following hypotheses: (1) both cyclic degradation and stress-corrosion mechanisms result in subcritical crack growth (SCG) in a fluorapatite glass-ceramic (IPS e.max ZirPress, Ivoclar-Vivadent) and (2) there is an interactive effect of stress corrosion and cyclic fatigue to accelerate subcritical crack growth.
0 Comments
Leave a Reply. |