J-integral testing

Lasher, R. J. "Integrity Testing of Control Systems." Control Engineering. February 1990. 

In this test a specimen, most often a compact tensile specimen, as used in the J-integral tests and shown in Figure 12.19, is placed in a hydraulic load frame, and then oscillated at either a fixed displacement (displacement control) or between fixed loads (load control). The choice of test depends in part on the application for the material. During the test, the crack length, Aa, is periodically measured. The stress intensity factor, K, which depends on the load range used. 

Fukuhara, N. (1999). Influence of molecular weight on J-integral testing of polypropylene. 

In this test, a specimen, most often a compact tensile specimen, as used in the J-integral tests and shown in Figure 24.20, is placed in a hydraulic load frame and then oscillated at either a fixed displacement (displacement... 

J. L. Anastasi and co-workers, "Molten-Caustic-Leaching (Gravimelt Process) Integrated Test Circuit Operation Results," Report to the Gravimelt Process Advisory Board, Summer 1989. 

M. J. Akers, in Parenteral Quality Control Sterility, Pyrogen, Particulate, and Package Integrity Testing, Vol. 1 (J. R. Robinson, ed.), Marcel Dekker, New York, 1985, pp. 207-209. 

Maclaurin s Integral Test. Suppose Is, is a series of positive terms and/is a continuous decreasing function such that/(.r ) > 0 for 1 < x < so and/(n) = an. Then the series and the improper integral j fix) dx either both converge or both diverge. 

Parenteral Quality Control Sterility, Pyrogen, Partioulate, and Paok-age Integrity Testing Third Edition, Revised and Expanded, Michaei J. Akers, Daniei S. Larrimore, and Dana Morton Guazzo... 

Birrer, G.A., Liu, J., Halas, J.M. and Nucera, G.G. (2000) Evaluation of a container closure integrity test model using visual inspection with confirmation by near infrared spectroscopic analysis /. Pharm. Sci. Tech. 54, 373-382. 

F. Hofmann, Integrity Testing of Microfiltration Membranes, J. Parenteral Sci. Tech-nol. 38, 148 (1984). 

Blaauboer, B.J., Barratt, M.D., and Houston, J.B., The integrated use of alternative methods in toxicological risk evaluation — ECVAM Integrated Testing Strategies task force report 1, Alt. Lab. Anim. (ATLA),... 

Ohio University Center for Automatic Identification Executive Summary Datamatrix and PDF417 Data Integrity Test, Russ, Fritz J, Russ, Dolores H. 

K9. Kulin, H. E., Bell, P. M., Santen, R. J., and Ferber, A. J., Integration of pulsatile gonadotropin secretion by timed urinary measurements an accurate and sensitive 3-hour test. J. Clin. Endocrinol. Metab. 40, 783-789 (1975). 

Meltzer, T., Agalloco, J., et al. (2001), Filter integrity testing in liquid applications Revisited, Part 1, Pharm Technol, 25(10), and Part 2, Pharm Technol, 25(11). 

Fig. 38 Evolution of /u, the J-Integral accounting for the fracture toughness, and of the elongation at break, break> as a function of the long period, LP, (left) and the lateral size of /3-crystals, L300, (right). Tests have been performed at room temperature on injection molded samples at 1.5 m s-1 to determine /Icj and at 50 mm min 1 to measure ebreak-Mechanical and structural responses have been varied by varying the concentration of NU-100, the nucleating agent from 0 to 1300 ppm...

Elastic modulus and yield stress were measured by compression tests on 10x5x4 mm prisms cut out from hot pressed plates. The J-integral measurements (J-Aa curve) were performed from tensile tests on CT specimens of 48 x 40 x 4 mm size, with a closed loop controlled machine (Schenk-Trebel). The starting crack was made using a razor blade (notch radius < 50 pm) up to a depth ao of 10 mm. 

Energy release rate, impact test, Charpy, crack closure, finite volume, J integral. 

As there were some doubts about the validity of the crack closure integral in the dynamic case, a J-integral expression from Equation (4) was implemented in the FV program. Because it was found that the J-integral is mesh sensitive and requires a very fine mesh, a test case of a center... 

Keywords rubber-toughened thermoplastic glass fibre ternary blends mechanical tests fracture toughness J-integral image analysis fractographic observations acoustic emission. 

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