PSI - Issue 50

V.V. Titkov et al. / Procedia Structural Integrity 50 (2023) 284–293

289

6

Titkov V.V. et al./ Structural Integrity Procedia 00 (2019) 000 – 000

compressive stresses occurs in the solenoid wall near the surface, which prevent the tensile stresses created by electromagnetic forces during subsequent induction pulses. Therefore, the residual deformation after the first pulse differs significantly from residual deformation at subsequent pulses (Fig. 5, Fig. 6). In particular, the steady-state mode of increment of the residual radius at a pulse amplitude of 30 T, which occurs starting from the second pulse, is characterized by a 60 times smaller increment compared to the first pulse.

Fig. 5. Evolution of radial deformation of the inner wall (R1) of the solenoid in a series of six (1, 2, 3, 4, 5, 6) pulses with an amplitude of 40 T.

Fig. 6. Evolution of the residual displacement of the inner wall of the solenoid in a series of six pulses with an amplitude of 30 T.

Based on the practical purposes of using single-turn solenoids, the resource can be estimated based on the retention of the geometric factor G, which connects the current in the solenoid and the induction of the magnetic field in its working volume B=G·i . For a solenoid of rectangular cross section (Shneerson G.A., 2011):



0 0.5 1 R 

.

(8)

G



l

