International round Robin test for mechanical properties of BSCCO-2223 superconductive tapes at room temperature |
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| Authors: | K Osamura A Nyilas K-P Weiss H-S Shin K Katagiri S Ochiai M Hojo M Sugano K Ohsawa |
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| Affiliation: | aResearch Institute for Applied Sciences, Sakyo-ku Tanaka, Kyoto 606-8202, Japan;bCryogemic Engineering and Materials Expertise, Margeritenweg 1, D-76297 Stutensee, Germany;cForschungszentrum Karlsruhe, Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany;dAndong National University, Andong, Kyungbuk 760-749, Republic of Korea;eIwate University, Ueda, Morioka 020-8551, Japan;fKyoto University, Yoshida, Kyoto 606-8501, Japan;gKyoto University, Katsura, Kyoto 615-8530, Japan;hYamaha Motor Co. Ltd., Shizuoka 438-8501, Japan |
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| Abstract: | International RRT was carried out in order to establish the test method for mechanical properties of commercial BSCCO superconductive tapes under cooperation of seven research laboratories. From the stress versus strain curve, the following quantities were evaluated; modulus of elasticity, 0.2% proof strength, fracture strength and stresses at fixed strains. The scatter of measured values was analyzed by evaluating the relative standard uncertainty (RSU), which is the standard uncertainty divided by the average. The expected value of RSU for N = 3 was derived for each mechanical quantities. In order to make clear the major contribution to the scatterings, the F test was applied. The major source of RSU’s was attributed mostly to the influence of inter-laboratory scattering. |
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| Keywords: | Superconductive tape BSCCO-2223 Modulus of elasticity 0 2% Yield strength Standard uncertainty |
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