Get Advances in Cryogenic Engineering Materials : Volume 30 PDF

By Ronald D. Kriz (auth.), A. F. Clark, R. P. Reed (eds.)

ISBN-10: 1461398681

ISBN-13: 9781461398684

ISBN-10: 1461398703

ISBN-13: 9781461398707

The 5th overseas Cryogenic fabrics convention (ICMC) was once held in Colorado Springs, Colorado in collaboration with the Cryogenic Engineering convention (CEC) on August 15-19, 1983. the expansion and luck of the joint meetings is because of the their complementary application and shut cooperation. fabrics stay a problem within the program of cryogenic know-how and infrequently, as in relation to superconductors, are the motive force for the know-how. The organization of fabrics and cryogenic engineers raises their information of modern study of their respective fi. elds and impacts the process destiny examine and purposes. Many contributed to the good fortune of the 1983 convention: E. W. Collings of Battelle Memorial Institute used to be the ICMC Confer­ ence Chairman; M. Suenaga of Brookhaven nationwide Laboratories, the ICMC application Chairman; and L. L. Sparks of the nationwide Bureau of criteria, the ICMC neighborhood preparations Chairman. J. M. Wells and A. I. Braginski of Westinghouse R & D middle, G. Hartwig of the Nuclear learn heart of Karlsruhe, and ok. T. Hartwig of the collage of Wisconsin assisted this system Chairman in steel metals, superconducting fabrics, nonmetallic fabrics, and cryo­ actual homes, respectively. very good convention administration used to be supplied via Centennial meetings. We particularly thank M. Stieg, who coordinated the guidance of the papers for this quantity. The CEC Board, specifically their convention chairman, C. D. Henning of Lawrence Livermore nationwide Laboratories, contributed very substan­ tially to convention making plans and implementation.

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Extra resources for Advances in Cryogenic Engineering Materials : Volume 30

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From this viewpoint, the acoustic emission (AE) method, which is suitable for inservice inspection, has been applied to the study of FRP fracture at cryogenic temperatures. * This work is supported in part by Grant in Aid for Scientific Research No. 57055035, Ministry of Education in Japan. 25 26 S. Nishijima, T. Okada, and S. Namba (~ 1 L_~,5q I Fig. 1. 85 ,, ¥j Shape and dimensions of tested sample. EXPERIMENT Tensile tests were performed at room (RT), liquid nitrogen (LNT), and liquid helium temperature (LHeT) on commercially available glass-cloth reinforced epoxy.

About five specimens were tested for each kind of specimen. Smm/min, corresponding to strain rate of 2xl0- 3 s- 1 • For compression tests, specimens had dimensions of 2x2x4mm 3 • Tests were made perpendicular to the laminate in the case of laminates and parallel to the fiber direction in unidirectional fiber reinforced plastics. Specimens were set in holes in an aluminium plate and enclosed in aluminium foil which was used to contain radioactive materials arising from fracture of the specimen. The specimen holder having multiple specimens rode manually on the hardened steel plate in liquid helium of cryostat without warm up after irradiation.

Cumulative AE counts measured in the ring-down mode are also presented. The amplification degree is 70 or 30 db. The breaking stresses at RT, LNT, and LHeT were 40 Acoustic Emission from Composite Materials at Low Temperatures 5 ... : ~ ~ ~3 ~ "~ ~ .!! 1 2 Elongation ( mm ) Fig. 2. l K I I 5 a -·- LH~T --- LNT -RT ~ / / i i i I .... , ·"' __ • 0 27 I i ; / 1 i i i i i i i i I / // ' lLNT RT 2 Elongation (mm ) 0 I 2 Elongation ( mm J Load-elongation curves of 0° oriented samples and cumulative AE count obtained at RT, LNT, and LHeT.

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Advances in Cryogenic Engineering Materials : Volume 30 by Ronald D. Kriz (auth.), A. F. Clark, R. P. Reed (eds.)

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