Effects of magnetic fields on cracks in a soft ferromagnetic material
The 2D problem of a soft ferromagnetic solid with a finite crack under a uniform magnetic field has been studied based on the linear theory of Pao and Yeh. Especially, in this work,the Maxwell stresses induced by the applied magnetic field are taken into account in the boundary conditions not only along the crack surfaces, but also at infinity. Based on these boundary conditions, the related boundary-value problem is solved by using Muskhelishvilis complex variable method to obtain the complex potentials. Thus, it is found that the obtained complex potentials are constant, which indicates that both magnetic fields and stress are uniform in the solid. This implies that if only a pure magnetic field is applied,it has no effects on a crack in a soft ferromagnetic solid. To confirm this result, the same boundary-value problem is solved by the integral transform technique, which shows the same finding as that by using the complex variable method. This outcome is consistent with available experimental data but different to previously published theoretical results.
Cracks Soft ferromagnetic materials Effect of magnetic fields
Cun-Fa Gao Yiu-Wing Mai Bao-Lin Wang
College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016.C Centre for Advanced Materials Technology (CAMT).School of Aerospace.Mechanical and Mechatronic Engin
国际会议
The Eighth International Conference on Fundamentals of Fracture(ICFF VIII)(第八届断裂基础国际会议)
香港·广州
英文
4863-4875
2008-01-03（万方平台首次上网日期，不代表论文的发表时间）