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References in periodicals archive ?
In this study, the critical crack tip opening displacement (CTOD) of X80 pipeline steel was studied both experimentally and numerically.
Figure 8 presents the variations of the critical crack mouth opening displacement ([CMOD.sub.c]) and the critical crack tip opening displacement ([CTOD.sub.c]) of the three-point bending beam specimens of the concrete containing nano-Si[O.sub.2] with different values of relative notch depth, respectively.
Shin, "Effects of microstructure on tensile, charpy impact, and crack tip opening displacement properties of two API X80 pipeline steels," Metallurgical and Materials Transactions A, vol.
Jakusovas and Daunys [14] investigated crack opening in the low cycle fatigue case using analytical, experimental and FEM techniques, where the influence of specimen size on crack tip opening displacement contour curve has been taken into consideration.
Effects of axiality of stress, Crack arrest theory, Stress intensity representation, Stress gradient, Rate of Strain, Effect of Cyclic Stress, Fatigue Crack, Crack Propagation, (KIc = [sigma] [square root of ([pi]a)] Griffith's theory of fracture mechanics, Irwin's K = [square root of (E)] x G, Crack Surface Displacement Mode, Crack Tip Opening Displacement (CTOD), (BS 5762-1979 and BS 7448 part-I) R-Curve Test methods J-Integral Test method, Linear-Elastic Fracture Mechanics (LEFM) (ASTM E 399), Elastic-Plastic Fracture Mechanics (EPFM), Nil Ductility Temperature (NDT).
The recorded maximum load [P.sub.u], the recorded crack mouth opening displacement CMODc at [P.sub.u], the calculated crack tip opening displacement [CTOD.sub.c] based on (20), the initial cracking load Pini determined by graphical method, the calculated residual Young's modulus E based on (18), the double-K fracture parameters, that is, [k.sup.ini.sub.Ic] and [K.sup.un.sub.Ic], and the residual fracture energy [G.sub.F] are summarized in Table 1.
Owing to the fact that the crazes which bridged the crack are shortened, the magnitude of crack tip opening for the specimen in water is smaller than that for the specimen in air.
Instead of the popular inexpensive Charpy V-Notch (CVN) test for fracture toughness, Appendix A specifies the crack tip opening displacement (CTOD) test to obtain a better assessment of fracture toughness.
10a, the crack tip opening in PVC-M is larger than PVC-U which is consistent with a tougher material.
He evaluated the crack growth rate based on an energy balance and crack tip opening displacement formulation.
Since, the work of fracture is equal to the crack tip opening displacement multiplied by the craze strength, materials with higher craze strength also exhibit increased SCG resistance.