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Elastic Stiffnesses of an Nb-Ti/Cu-Composite Superconductive Wire



Sudook A. Kim, H M. Ledbetter, H Ogi


Elastic-stiffness coefficients were determined on a 1.4-mm-diameter wire consisting of superconducting Nb-Ti fibers in a copper matrix, with a polyvinyl-resin coating. The matrix contained 324 Nb-Ti fibers. An electromagnetic-acoustic-resonance method was used to obtain five independent elastic-stiffness coefficients assuming transverse-isotropic symmetry. From these we calculated Young moduli, bulk modulus, and principal Poisson ratios. As a check, we used a mechanical-impulse-excitation method to directly measure the Young modulus in the fiber direction. The three-phase composite wire showed a 10% anisotropy in the Young modulus.
Journal of Applied Physics
No. 5


copper matrix, elastic-stiffness coefficients, polyvinyl-resin coating


Kim, S. , Ledbetter, H. and Ogi, H. (2000), Elastic Stiffnesses of an Nb-Ti/Cu-Composite Superconductive Wire, Journal of Applied Physics (Accessed April 21, 2024)
Created September 1, 2000, Updated February 17, 2017