International Journal of Applied Electromagnetics and Mechanics - Volume 32, issue 1

Authors: Kore, S.D. | Dhanesh, P. | Kulkarni, S.V. | Date, P.P.

Article Type: Research Article

Abstract: Feasibility of electromagnetic welding of flat sheets is ascertained by comparing the minimum impact velocities determined by using software ANSYS/EMAG and ABAQUS with the required minimum velocity obtained from analytical considerations. Magnetic forces acting on the sheets are computed from ANSYS/EMAG simulations. The velocity of impact and the pressure profile acting on the sheets are found from ABAQUS simulations. A criterion for weld formation is subsequently arrived at based on the simulations, which is further …validated using experimental results. The reasons for no-weld zone in Al-to-Al EM weld and complete metal continuity (absence of no-weld zone) in Al-to-SS EM weld have been analyzed based on the numerical and experimental results. Show more

Keywords: Electromagnetic, welding, modeling

DOI: 10.3233/JAE-2010-1062

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 32, no. 1, pp. 1-19, 2010

Authors: Martinez, M. Rigoberto | Minor, M. Arturo

Article Type: Research Article

Abstract: This article describes the design and construction of an electronic device to assist orthopedic surgeons in the intramedullary nailing of long bones. The objective of the system is to reduce the cumulative radiation to which surgeons are exposed while performing the operation, as well as reduce the time required to complete the task. The system uses the magnetic flux of permanent magnets and electronic sensors to determine, without the need for a fluoroscope, the position of …the distal hole in the rod. Tests show the system is feasible. Show more

Keywords: Accumulative radiation, magnetic flux sensors, permanent magnets, portable electronic device

DOI: 10.3233/JAE-2010-1063

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 32, no. 1, pp. 21-30, 2010

Authors: Gao, Yang | Xu, Bai-Xiang

Article Type: Research Article

Abstract: Without employing ad hoc stress or deformation assumptions, various two-dimensional equations and solutions for plane problems have been deduced systematically and directly from thick plate theory by using the general solution of magnetoelastic theory for the soft ferromagnetic elastic solids and the Lur'e method. These equations and solutions are used to construct the refined theory for the plane problems. In the case of homogeneous boundary conditions, the exact governing differential equations and solutions for the …plate are derived, which consist of four governing differential equations. It can be noted that the refined theory is consistent with the decomposition theorem by Gregory. In the case of nonhomogeneous boundary conditions, the approximate governing differential equations and solutions for the plate are accurate up to the second-order terms. The correctness of the stress assumptions in the classic plane stress problems is revised. In two illustrative examples of plates, it is shown that the exact or accurate solutions can be obtained in use of the refined theory deduced herein. Show more

Keywords: Plane problems, plates, the refined theory, magnetoelastic, governing equations

DOI: 10.3233/JAE-2010-1064

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 32, no. 1, pp. 31-46, 2010

Authors: Xu, Y.L. | Xiao, J.H. | Shen, Y.Z.

Article Type: Research Article

Abstract: The electro-magneto-elastic composites containing a doubly periodic parallelogrammic array of coated fibers are dealt with under antiplane shear coupled with inplane electro-magnetic loads, a rigorous analytical method is developed by using the generalized eigenstrain (an aggregation of eigenstrain, eigen-electric-field and eigen-magnetic-field) concept integrated with the doubly quasi-periodic Riemann boundary value problem theory. The expressions of electro-magneto-elastic fields in each phase of composites are obtained. A comparison with the finite element analysis (FEA) …results demonstrates the accuracy of the proposed method. The effects of the coating with different thickness and stiffness on the stress concentration factor and electro-magneto-elastic effective moduli are discussed and a lot of interesting electro-magneto-elastic interaction phenomena are revealed, which are useful to estimate and optimize the performance of such elector-magneto-elastic composites. Also, the present method can provide benchmark results for other numerical and approximate methods. Show more

Keywords: Electro-magneto-elastic fiber composites, double period, coating, effective modulus, stress concentration

DOI: 10.3233/JAE-2010-1066

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 32, no. 1, pp. 47-62, 2010