Theoretical and experimental determination of magnetic stress intensity factors of a crack in a double cantilever beam specimen
Theoretical and experimental determination of magnetic stress intensity factors of a crack in a double cantilever beam specimen
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DOI：
10.1111/j.1460-2695.2004.00748.x
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发表时间：
2004-03
影响因子：
3.7
通讯作者：
K. Yoshimura;Y. Shindo;K. Horiguchi;F. Narita
中科院分区：
文献类型：
--
作者：
K. Yoshimura;Y. Shindo;K. Horiguchi;F. Narita
本文介绍了双悬臂梁（DCB）试件磁断裂行为的实验和理论研究结果。在超导磁体孔中对铁素体不锈钢SUS430进行了室温DCB试验。采用应变片法测定了应力强度因子。实验结果表明，应力强度因子随磁场的增大而增大。理论分析是基于软铁磁材料中磁弹性相互作用的束板理论。进行了数值计算，得到了不同磁场值下的应力强度因子。对应力强度因子进行了理论与实验的比较，在考虑磁场时符合较好。
This paper presents the results of an experimental and theoretical investigation of the magnetic fracture behaviour of double cantilever beam (DCB) specimens. DCB tests were conducted on ferritic stainless steel SUS430 in the bore of a superconducting magnet at room temperature. A simple experimental technique using strain gauges was used to determine the stress intensity factor. The experiments show the predicted increase in the stress intensity factor with increasing magnetic field. The theoretical analysis is based on a beam-plate theory for magnetoelastic interactions in a soft ferromagnetic material. Numerical calculations are carried out, and the stress intensity factor is obtained for several values of magnetic field. A comparison of the stress intensity factor is made between theory and experiment, and the agreement is good for the magnetic field considered.