TY - JOUR
T1 - A double cantilever beam model for fracture toughness analysis of superconductors
AU - Wang, K. F.
AU - Wang, B. L.
PY - 2019
Y1 - 2019
N2 - Due to their high current-carrying property, high-temperature superconductors such as multilayered superconducting cables have great potential applications in space solar power stations. The force induced by flux pinning may be very high and cause damage of superconductors. In this paper, the double cantilever beam (DCB) specimen for high-temperature superconductors is investigated and the energy release rate, mode I and mode II stress intensity factors are obtained in closed-form. For mode I crack, the energy release rate and stress intensity factor under magnetic field are found to be larger than those without magnetic field. However, mode II stress intensity factor is independent of applied magnetic field. In addition, mode I stress intensity factors with root effect are dependent of the ratio of length to thickness. This is contrary to the results without root part, which is independent of the ratio of length to thickness. The results are useful for determining fracture toughness of superconductor materials. © 2018
AB - Due to their high current-carrying property, high-temperature superconductors such as multilayered superconducting cables have great potential applications in space solar power stations. The force induced by flux pinning may be very high and cause damage of superconductors. In this paper, the double cantilever beam (DCB) specimen for high-temperature superconductors is investigated and the energy release rate, mode I and mode II stress intensity factors are obtained in closed-form. For mode I crack, the energy release rate and stress intensity factor under magnetic field are found to be larger than those without magnetic field. However, mode II stress intensity factor is independent of applied magnetic field. In addition, mode I stress intensity factors with root effect are dependent of the ratio of length to thickness. This is contrary to the results without root part, which is independent of the ratio of length to thickness. The results are useful for determining fracture toughness of superconductor materials. © 2018
UR - https://hdl.handle.net/1959.7/uws:64586
U2 - 10.1016/j.physc.2018.10.012
DO - 10.1016/j.physc.2018.10.012
M3 - Article
SN - 0921-4534
VL - 558
SP - 38
EP - 43
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
ER -