Stress analysis of structurally graded long solenoid coils

Conference · Wed Jan 01 04:00:00 EST 1992 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:5162578

Mitchell, N; Mszanowski, U ^[1]

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1. Max-Planck-Institut fuer Plasmaphysik, Garching (Germany)

A long solenoid coil can be considered from the structural viewpoint as a thick cylinder with a distributed radial body force due to the magnetic loads. The coil structure consists of conducting material and reinforcing structure bonded together by insulation. Since the conductor dimensions are small compared to that of the solenoid, smeared elastic properties can be used to represent the overall mechanical behavior of the winding. Varying the proportion of structural material across the radius can produce a graded solenoid. Although finite element analysis can be applied to such situations, a better understanding of the stress behavior can be achieved by solving the governing equilibrium and compatibility equations directly. In this paper it is shown that even radially uniform solenoid coils must contain radially non-uniform axial stresses to maintain plane strain conditions. Without vertical compression, vertical stresses can exist between the insulation layers. Uniform solenoids are under conditions of radial compression which are beneficial to the insulation system. Structural grading easily creates conditions of radial tension.

• OSTI ID: 5162578
• Report Number(s): CONF-910662--
• Conference Information: Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 28:1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602 -- Other Materials-- Structure & Phase Studies
360603 -- Materials-- Properties
360607 -- Other Materials-- Superconducting Properties-- (1992-)
665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BONDING
CHEMICAL COMPOSITION
COMPOSITE MATERIALS
COMPRESSION STRENGTH
CRYSTAL STRUCTURE
ELECTRIC COILS
ELECTRICAL EQUIPMENT
EQUIPMENT
FABRICATION
FINITE ELEMENT METHOD
JOINING
MAGNETIC INSULATION
MATERIALS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NUMERICAL SOLUTION
REINFORCED MATERIALS
SOLENOIDS
STRESS ANALYSIS
SUPERCONDUCTING COILS
SUPERCONDUCTING COMPOSITES
TENSILE PROPERTIES