Fracture behaviors of a functionally graded thin superconducting film with transport currents based on the strain energy density theory

Feng, Wenjie; Liu, Qifang; Su, R.K.L.

doi:10.1016/j.tafmec.2014.07.002

Cited by 14 publications

(3 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, the fracture analysis of nonhomogeneous HTS is a key issue in superconductor crack problems. Feng et al have studied the crack problem for a functionally graded thin superconducting film [19][20][21].…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 99%

Fracture problem of a nonhomogeneous high temperature superconductor slab based on real fundamental solutions

Gao

Zheng

2015

Physica C: Superconductivity and its Applications

View full text Add to dashboard Cite

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 99%

Fracture problem of a nonhomogeneous high temperature superconductor slab based on real fundamental solutions

Gao

Zheng

2015

Physica C: Superconductivity and its Applications

View full text Add to dashboard Cite

“…Therefore, in this paper, based on the previous work [2,[22][23][24][25][26], we set up a 3D model coupled with the magnetic field (H-method) and thermal field to investigate the electromagnetic-thermal behaviors of an HTS levitation system consisting of a cylindrical PM and HTS with a cuboid slot under moving magnetic fields caused by the movement of a PM, which have not been reported so far. Using the 3D coupled model established, we found that the electromagnetic behaviors of an HTS with a cuboid slot is very different from those without damage including its electromagnetic force and loss.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic-thermal behaviors of bulk superconductor with cuboid slot under moving magnetic field

Yu¹,

Feng²,

Gu³

et al. 2020

Supercond. Sci. Technol.

View full text Add to dashboard Cite

We established a 3D coupled model to study the electromagnetic-thermal behaviors of a levitation system containing a bulk high-temperature superconductor (HTS) with a cuboid slot under the nonuniform magnetic field due to the movement of a permanent magnet (PM), analysing the influences of the geometrical parameters of the slot and inclination angle on the electromagnetic-thermal behaviors, giving the dynamic distribution of the global electromagnetic force density in the HTS. The results show that the longer the length of the slot, the smaller the levitation force, and the greater the loss. As its length takes up 7/10 of the HTS diameter, the loss is 4 times that of the HTS without damage. Due to the homodromous induced current appearing near the slot, the maximum guidance force increases with the length. The levitation force decreases with the increase of the slot depth. Its curve near the maximum becomes blunt and the loss increases significantly. As the depth is 3/5-4/5 of the HTS height, the loss is 300-400 times of that without damage. The guidance force and loss increase with the depth. As the inclination angle rises, the levitation and guidance force both drop. At 30 • , their maximums decrease by 70 % and 90 %, respectively. The lateral stability of the system thus becomes poorer, indicating the inclination angle is one of the important factors for instability. As the PM moves vertically, the guidance force density symmetrically distributes near the both wide sides of the slot. Its side faces with the wide sides will bear the shear force, resulting in that the slot has the tendency to tear along these faces. As the PM reciprocates laterally, the slot is subjected to the lateral shear force, proportional to the displacement.

show abstract

“…Content may change prior to final publication. [23][24][25][26][27][28]. Recently, the stress in multi-filamentary superconducting composite was considered, and the results show that lower volume fraction of superconducting filaments has less stress in the composite under magnetic field [29].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Stress in the Superconducting Film Under External Magnetic Field

Yong

Jing

et al. 2016

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

In this paper, the mechanical response is studied for different superconducting films in magnetic field. When the superconductors are under magnetic field, the electromagnetic body force will act on the sample. High mechanical stress can affect the mechanical and electromagnetic properties of the superconductors. Based on the Maxwell's equations and fast Fourier transform, the Lorentz force is obtained for the superconducting film during magnetization. We take into account the square and circular superconducting films with finite element method. In addition, the effects of notches and inclusion on the mechanical stress are presented. Numerical results indicate that square film and circular film have similar stress distributions. In the same magnetic field, the stress along the axis is smaller in the superconducting film with notches or inclusion. Finally, the superconducting film with substrate is considered. The mechanical stability can be enhanced by the substrate.

show abstract

Fracture behaviors of a functionally graded thin superconducting film with transport currents based on the strain energy density theory

Cited by 14 publications

References 32 publications

Fracture problem of a nonhomogeneous high temperature superconductor slab based on real fundamental solutions

Fracture problem of a nonhomogeneous high temperature superconductor slab based on real fundamental solutions

Electromagnetic-thermal behaviors of bulk superconductor with cuboid slot under moving magnetic field

Mechanical Stress in the Superconducting Film Under External Magnetic Field

Contact Info

Product

Resources

About