... specimens leads to a flatter JR-CUrve ("wider-lower" pattern) while in plain sided specimens to a steeper JR-CUrve ("wider-higher" pattern). For geometrically similar specimens with a constant ratio of B/b, the increase of b shows no effects on the JR-CUrve ("wider-no effect" pattern). Results...

... made at several points during the tests. J R -curve crack growth unloading compliance fracture toughness fracture test compliance three-point bend calibration elastic-plastic fracture tunneling Paulus A. J. M. Steenkamp^ JR-Curve Testing of Three-Point Bend Specimens by the Unloading...

... subject to Eq 5. 188 FRACTURE MECHANICS: SIXTEENTH SYMPOSIUM The procedures for developing the J-l curve for the example above are presented graphically in Fig. 2. They can be summarized as follows: 1. Discretize the material Jr-curve (Eq 1) with proper intervals of crack length a (Fig. 2a). 2. Solve Eq 5...

... of this has been observed from tests that were designed to determine /jc, where JR curves are used to characterize stable-crack growth. The /ic-values are defined at the onset of crack growth. In the lower part of the transition region there sometimes is plasticity development followed by cleavage instability...

..., residualstress,JR-Curve The failure assessment diagram procedure for assessing the integrity of flawed structures evolved from the "two criteria" approach due to Dowling and Townley [1].3 The present form of the diagram, also referred to as the R-6 diagram, is due to Harrison, Loosemore, and Milne [2]. Chell [3...

... a curve through the experimental data. However, these conflicts need not concern us for the present, except insofar as we recognize that by any system of measurement Jic will be a point on the early part of the resistance curve. Since this part of the JR-CUrve is, within limits [17,18], geometry- and size...

... I JR-CurveTesting of Large Compact Specimens REFERENCE: McCabe, D. E. and Landes, J. D., "JR-Curve Testing of Large Compact Speelmens~" Elastic-Plastic Fracture: Second Symposium, Volume II--Fracture Resistance Curves and Engineering Applications, A S T M STP 803, C. F. Shih and J. P. Gudas, Eds...

... -curves. elastic-plastic fracture J R -curve A50B steel Donald E. McCabe, 1john D. Landes, 1and Hugo A. Ernst 1 An Evaluation of the JR-Curve Method for Fracture Toughness Characterization REFERENCE: MeCabe, D. E., Landes, J. D., and Ernst, H. A., "An Evaluation of the JR-CUtwe Method...