A Review on Electromagnetic Forming Process

Gayakwad, Dhiraj; Dargar, Mahesh Kumar; Sharma, Pramod Kumar; Purohit, Rajesh; Rana, R.S.

doi:10.1016/j.mspro.2014.07.066

Cited by 61 publications

(16 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Interest of aeronautical and automotive industries in high energy rate forming (HERF) processes, such as explosive, electromagnetic and electrohydraulic forming, has been growing in recent years due to their potential to form aluminium, titanium, high-strength steel and other low formability metallic materials (Song et al, 2004). The high strain rates achieved in HERF processes in comparison to conventional quasi-static metal forming operations lead to significant changes in the constitutive behavior of the materials and give rise to inertial effects which contribute to delay necking localization and ductile fracture (Mamalis et al, 2004;Gayakwad et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

A three-pronged approach to predict the effect of plastic orthotropy on the formability of thin sheets subjected to dynamic biaxial stretching

Rodríguez-Martínez¹,

N'souglo²,

Jacques³

2020

Preprint

View full text Add to dashboard Cite

In this paper, we have investigated the effect of material orthotropy on the formability of metallic sheets subjectedto dynamic biaxial stretching. For that purpose, we have devised an original three-pronged methodology which includes a linear stability analysis, a nonlinear two-zone model and ?finite element calculations. We have studied 5 different materials whose mechanical behavior is described with an elastic isotropic, plastic anisotropic constitutive model with yielding based on Hill (1948) criterion. The linear stability analysis and the nonlinear two-zone model are extensions of the formulations developed by Zaera et al. (2015) and Jacques (2020), respectively, to consider Hill (1948) plasticity. The ?finite element calculations are performed with ABAQUS/Explicit (2016) using the unit-cell model developed by Rodriguez-Martinez et al. (2017), which includes a sinusoidal spatial imperfection to favor necking localization. The predictions of the stability analysis and the two-zone model are systematically compared against the ?finite element results --which are considered as the reference approach to validate the theoretical models-- for loading paths ranging from plane strain stretching to equibiaxial stretching, and for different strain rates ranging from 100 s-1 to 50000 s-1. The stability analysis and the two-zone model yield the same overall trends obtained with the ?finite element simulations for the 5 materials investigated, and for most of the strain rates and loading paths the agreement for the necking strains is also quantitative. Notably, the differences between the ?finite element results and the two-zone model rarely go beyond 5%. Altogether, the results presented in this work provide new insights into the mechanisms which control dynamic formability of anisotropic metallic sheets.

show abstract

Section: Introductionmentioning

confidence: 99%

A three-pronged approach to predict the effect of plastic orthotropy on the formability of thin sheets subjected to dynamic biaxial stretching

Rodríguez-Martínez¹,

N'souglo²,

Jacques³

2020

Preprint

View full text Add to dashboard Cite

show abstract

“…As a consequence, a large magnitude magnetic repulsion force is created between the coil and the sheet which is large enough to overcome the yield strength of the sheet and cause a permanent deformation. EMF process attracts increasing scientific interests owing to the significant properties in improving the formability of metal sheets and reducing spring-back and wrinkling [1,2]. The application prospects of EMF are excellent in solving the problem of forming lightweight metals that are difficult to shape.…”

Section: Introductionmentioning

confidence: 99%

“…the shape function are indicated explicitly at the nodes(1,2,3,4,5,6). Then, the shape function values of other points are obtained by linear interpolation of those at given nodes.In electromagnetic field, magnetic flux density B is defined as…”

mentioning

confidence: 99%

A triangular prism solid and shell interactive mapping element for electromagnetic sheet metal forming process

Cui

She

Feng

et al. 2017

Journal of Computational Physics

View full text Add to dashboard Cite

In this paper, a novel triangular prism solid and shell interactive mapping element is proposed to solve the coupled magnetic-mechanical formulation in electromagnetic sheet metal forming process. A linear six-node "Triprism" element is firstly proposed for transient eddy current analysis in electromagnetic field. In present "Triprism" element, shape functions are given explicitly, and a cell-wise gradient smoothing operation is used to obtain the gradient matrices without evaluating derivatives of shape functions. In mechanical field analysis, a shear locking free triangular shell element is employed in internal force computation, and a data mapping method is developed to transfer the Lorentz force on solid into the external forces suffered by shell structure for dynamic elasto-plasticity deformation analysis. Based on the deformed triangular shell structure, a "Triprism" element generation rule is established for updated electromagnetic analysis, which means inter-transformation of meshes between the coupled fields can be performed automatically. In addition, the dynamic moving mesh is adopted for air mesh updating based on the deformation of sheet metal. A benchmark problem is carried out for confirming the accuracy of the proposed "Triprism" element in predicting flux density in electromagnetic field. Solutions of several EMF problems obtained by present work are compared with experiment results and those of traditional method, which are showing excellent performances of present interactive mapping element.

show abstract

“…The interaction of electromagnetic field with conducting medium is the subject of study in many technical and electrophysical applications. Examples include equipment for high frequency induction heat treatment of metals [1][2][3], installations for processing of metals under the action of high intensity electromagnetic field and high density currents [4][5][6], devices for electromagnetic forming or high-speed forming technology using pulse magnetic field [7][8][9]. A strong skin effect occurs in conducting elements of this equipment, in which the current and electromagnetic field are concentrated in a thin skin layer.…”

mentioning

confidence: 99%

Penetration of non-uniform electromagnetic field into conducting body

Vasetsky¹

2021

Electrical Engineering & Electromechanics

View full text Add to dashboard Cite

The study is based on the exact analytical solution for the general conjugation problem of three-dimensional quasi-stationary field at a flat interface between dielectric and conducting media. It is determined that non-uniform electromagnetic field always decreases in depth faster than uniform field. The theoretical conclusion is confirmed by comparing the results of analytical and numerical calculations. The concept of strong skin effect is extended to the case when penetration depth is small not only compare to the characteristic body size, but also when the ratio of the penetration depth to the distance from the surface of body to the sources of the external field is small parameter. For strong skin effect in its extended interpretation, the influence of external field non-uniformity to electromagnetic field formation both at the interface between dielectric and conducting media and to the law of decrease field in conducting half-space is analyzed. It is shown, at the interface the expressions for the electric and magnetic intensities in the form of asymptotic series in addition to local field values of external sources contain their derivatives with respect to the coordinate perpendicular to the interface. The found expressions made it possible to generalize the approximate Leontovich impedance boundary condition for diffusion of non-uniform field into conducting half-space. The difference between the penetration law for the non-uniform field and the uniform one takes place in the terms of the asymptotic series proportional to the small parameter to the second power and to the second derivative with respect to the vertical coordinate from the external magnetic field intensity at the interface.

show abstract

A Review on Electromagnetic Forming Process

Cited by 61 publications

References 23 publications

A three-pronged approach to predict the effect of plastic orthotropy on the formability of thin sheets subjected to dynamic biaxial stretching

A three-pronged approach to predict the effect of plastic orthotropy on the formability of thin sheets subjected to dynamic biaxial stretching

A triangular prism solid and shell interactive mapping element for electromagnetic sheet metal forming process

Penetration of non-uniform electromagnetic field into conducting body

Contact Info

Product

Resources

About