... be taken as the crack tip opening displacement for initiation, CTOD i , and the angle CTOA for growth. SLFM1 has different response functions of only the stress and slip as driving parameters. Slip line analyses for exact and approximate stress and deformation fields are given for typical specimens...

... Mode II fracture crack tip opening displacement crack tip sliding displacement stable crack growth flaw assessment Engineering Treatment Model Claudio Dalle Donne I The Crack Tip Displacement Vector Approach to Mixed-Mode Fracture REFERENCE: Dalle Donne, C., "The Crack Tip Displacement Vector...

... for fracture experiments with CRB. fracture toughness cracked round bars constraint J-integral crack tip opening displacement cleavage ductile tearing Jacques H. Giovanola/ R. W. Klopp/ J. E. Crocker, 2 D. J. Alexander, 3 W. R. Corwin, 3 and R. K. Nanstad, 3 Using Small Cracked Round Bars...

... parameter Q . Comparison of experimental results of CTOD tests gives good agreement with theory. ductile fracture void nucleation void growth crack tip opening displacement J -integral constraint Shang-Xian W u 1 and Yiu-Wing MaiI TWO-PARAMETER (J-Q) FRACTURE CHARACTERIZATION OF DUCTILE...

... fracture mechanics, J-integral, modified J-integral, Jresistance curves, crack tip opening displacement, crack face separation profiles. IPostdoctoral Fellow and 2Professor, G.W.Woodruff School of Mechanical Engineering, The Georgia Institute of Tectmology, Athmta, GA 30332--0405. 284 Copyright9 by ASTM...

... A number of years ago δ 5 was introduced as an experimental technique for determining the crack tip opening displacement. Experience gained since then has confirmed that δ 5 can be used as an operational definition of the CTOD which has the advantage that due to its direct measurement without...

... The paper presents the experimental heat-affected zone (HAZ) crack tip opening displacement (CTOD) test data in terms of the size and number of local brittle zones (LBZ) hit by fatigue precrack which were carried out by the Fracture Toughness of Weldments (FTW) Committee of the Japan Welding...

... The Engineering Treatment Model (ETM) relates the crack tip opening displacement (CTOD) and the J integral with the applied load or applied strain using a geometry independent, master-curve-type, equation. In the present paper, CTOD and J were examined as a function of the applied strain...

... show that the crack tip opening displacement, δ 5 , and the modified J -integral J m , can correlate significantly more stable crack growth than the conventional J -integral. R -curves J -integral modified J -integral crack tip opening displacement size dependence necking of specimens...

..., the flow stress and the plastic CTOD R-curve. KEY WORDS: plastic fracture, limit load, compact tension specimen, crack tip opening displacement, plastic rotation factor, CTOD R-curve The fracture of a cracked body can be broadly characterized as being elastic, elasticplastic, or plastic. In elastic...

... The impact fracture of a tough ductile material is examined by comparing the results of static and dynamic viscoplastic finite element computations with experimental observations of the crack tip opening displacement (CTOD) during static and dynamic (impact) fracture. Experiments measured...

...-intensity factor was measured with high resolution immediately at the crack tip both before an overload and during the subsequent growth rate retardation period. Crack-tip opening displacement and strain were altered in the same way as growth rate following the overload/underload events, and similitude...

... dioxide) and external environment (corrosion, cathodic protection). A case history of the application of fracture mechanics for evaluating the static fracture toughness and subcritical crack growth resistance of an external longitudinal weld toe crack is discussed. crack tip opening displacement...

... Elastic-plastic finite element analyses of the three-point bend specimen geometry were performed as part of an investigation to study the application of the crack tip opening displacement (CTOD) fracture parameter to flawed pressure vessels. The elastic-plastic fracture mechanics (EPFM...

... Crack opening and closure levels are determined for small cracks growing from sharp and blunt notches during cyclic loading. Crack tip opening displacement measurements as low as 0.1 μm are reported. Experimental crack opening levels are compared with analytical crack opening levels for various...

... are then determined by using the dynamic photoelasticity results of rapid tear and stable crack growth in thin polycarbonate sheets. The modified Dugdale model is justified by the good agreement between the computed and directly measured isochromatics. Crack tip opening displacement (CTOD) and crack tip opening angle...

... -integral and of the crack tip opening displacement (CTOD) along the crack front are presented and discussed. The stress intensity factors K 1 calculated by extrapolation from stresses and displacements and by the energy release rate agree well within a tolerance of about 10%. As in linear elasticity...

... J-R curves and δ-R curves were measured on 5-mm-thick compact, three-point bend, and center cracked tension specimens with different widths and different precrack lengths. The crack tip opening displacement ( δ ) was measured at the fatigue crack tip. The materials tested were an age...

... Detailed quantitative measurements of crack tip strains have been made for near-threshold fatigue cracks in 7075-T6 aluminum specimens grown in a vacuum environment. In addition, crack tip opening displacements and crack growth rates have been measured. These data are used in three related...

... cyclic crack growth relation linear elastic fracture mechanics strain intensity J-integral creep-fatigue interaction tension dwell frequency total endurance integrated endurance striation spacing growth models crack tip opening displacement transgranular and intergranular crack...