ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Fracture of pre-cracked thin metallic conductors due to electric current induced electromagnetic force

Sharma, Deepak and Reddy, B Subba and Kumar, Praveen (2018) Fracture of pre-cracked thin metallic conductors due to electric current induced electromagnetic force. In: INTERNATIONAL JOURNAL OF FRACTURE, 212 (2). pp. 183-204.

[img] PDF
Int_Jou_Fra_212-2_183_2018.pdf - Published Version
Restricted to Registered users only

Download (9MB) | Request a copy
Official URL: http://dx.doi.org/10.1007/s10704-018-0299-2

Abstract

We investigated propagation of a sharp crack in a thin metallic conductor with an edge crack due to electric current induced electromagnetic forces. Finite element method (FEM) simulations showed mode I crack opening in the edge-cracked conductor due to the aforementioned (i.e., self-induced) electromagnetic forces. Mode I stress intensity factor due to the self-induced electromagnetic forces, was evaluated numerically as , where is the magnetic permeability, l is the length of the conductor, a is the crack length, j is the current density, w is the width of the sample and f(a / w) is a geometric factor. Effect of dynamic electric current loading on edge-cracked conductor, incorporating the effects of induced currents, was also studied numerically, and dynamic stress intensity factor, , was observed to vary as . Consistent with the FEM simulation, experiments conducted using thick Al foil with an edge crack showed propagation of sharp crack due to the self-induced electromagnetic forces at pulsed current densities of for . Further, effects of current density, pulse-width and ambient temperature on the fracture behavior of the Al foil were observed experimentally and corroborated with FEM simulations.

Item Type: Journal Article
Additional Information: Copy right for this article belong to SPRINGER, VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 06 Sep 2018 15:44
Last Modified: 06 Sep 2018 15:44
URI: http://eprints.iisc.ac.in/id/eprint/60592

Actions (login required)

View Item View Item