Results 171 to 180 of about 4,172 (192)
Biomimetic Artificial Muscles Inspired by Nature's Volume-Change Actuation Mechanisms. [PDF]
Biomimetics (Basel)Kim H, Kim M, Noh Y, Jang Y.
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Graphene-Skinned Fiber with Fine-Tunable Electrical Resistance via Radical and Substrate Engineering for Electromagnetic-Thermal Fabric. [PDF]
Nanomicro LettLiang J +6 more
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Current frequency effect on electromagnetic tube expansion
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2020The frequency of capacitor discharge current is an important parameter in the electromagnetic forming process. In the present work, simulation and experimental study of electromagnetic expansion is carried out on aluminium tubes (Al 5052). The aim is to obtain the optimum frequency of discharge current that gives maximum tube expansion at constant ...
Biswaranjan Dikshit, Shantaram Dond
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THE EXPANSION OF A THIN FREE TUBE IN ELECTROMAGNETIC FORMING
International Journal of Production Research, 1970The analysis of electromagnetic forming has been extended to allow for an approximate evaluation of axial inertia, strain rate and temperature effects. Good agreement is obtained with published measurements of time varying displacement and velocity.
M J Hillier
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Numerical Modeling of Electromagnetic Tube Expansion and Formability Assessment
Key Engineering Materials, 2013In the present paper, an EMF numerical model has been developed following an uncoupled approach, being the Lorentz forces acting on the workpiece estimated by solving Maxwells equations and then transferred to solve the mechanical problem. For formability analysis, a fracture indicator based on the linear forming limit diagram was applied through the ...
Inés Oliveira +2 more
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IEEE Transactions on Applied Superconductivity, 2018
At present, the cylindrical coil is used to generate the electromagnetic force in electromagnetic tube expansion process. The obtained radial electromagnetic force in the end of the tube is less than the one in the middle of the tube for the end effects. Hence, the tube deformation is inhomogeneous in the axial direction.
Qi Xiong, Li Qiu, Xiaotao Han
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At present, the cylindrical coil is used to generate the electromagnetic force in electromagnetic tube expansion process. The obtained radial electromagnetic force in the end of the tube is less than the one in the middle of the tube for the end effects. Hence, the tube deformation is inhomogeneous in the axial direction.
Qi Xiong, Li Qiu, Xiaotao Han
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Numerical and experimental investigation in electromagnetic tube expansion with axial compression
International Journal of Advanced Manufacturing Technology, 2019In conventional electromagnetic tube expansion (EMTE), the wall thickness of the tube decreases significantly because the electromagnetic force is mainly in the radial direction. To solve this problem, this paper proposes a new method named electromagnetic tube expansion with axial compression (EMTEAC).
Yantao Li, Pan Su, Qi Xiong
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Estimation of the magnetic pressure in tube expansion by electromagnetic forming
Journal of Materials Processing Technology, 1996Abstract In the analysis of electromagnetic forming processes it is essential to be able to estimate the magnetic pressure acting on the workpiece. For this purpose the analysis of the equivalent electric circuit has been used widely. In this approach, it was assumed that the workpiece and the forming coil are so long that the end effect can be ...
Sung Ho Lee, Dong Nyung Lee
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Metals and Materials International, 2008
The expansion of a metal tube by means of an electromagnetic forming (EMF) process is attractive because EMF has a high forming rate and can reduce residual stress. The forming forces in EMF are Lorentz forces. They are derived from a repulsive interaction between a transient electric current induced in a coil with the aid of a capacitor bank and an ...
Chansun Shin +2 more
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The expansion of a metal tube by means of an electromagnetic forming (EMF) process is attractive because EMF has a high forming rate and can reduce residual stress. The forming forces in EMF are Lorentz forces. They are derived from a repulsive interaction between a transient electric current induced in a coil with the aid of a capacitor bank and an ...
Chansun Shin +2 more
exaly +2 more sources
International Journal of Impact Engineering, 2016
High speed forming processes such as magnetic pulse forming are gaining interest in the sheet metal industry. Their design and development require specific effort on numerical modelling as well as on the characterization of the high strain-rate mechanical behaviour of metals.
Nicolas Jacques, Michel Arrigoni
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High speed forming processes such as magnetic pulse forming are gaining interest in the sheet metal industry. Their design and development require specific effort on numerical modelling as well as on the characterization of the high strain-rate mechanical behaviour of metals.
Nicolas Jacques, Michel Arrigoni
exaly +3 more sources