EAGER/Collaborative Research: Electromagnetic Pulse Induced Cutting (EPIC) of Metallic Components

University Of Texas At Austin, Austin TX

Investigators

Abstract

The research objective of this Early Concept Grant for Exploratory Research (EAGER) award is to demonstrate proof-of-concept of a novel manufacturing process for cutting thin sheet and plates in a tool-less, freeformed fashion. The process, termed Electromagnetic Pulse Induced Cutting, is based on the controlled advance of a fine crack under combined electromagnetic and mechanical loading. The approach will be to utilize electromagnetic forces associated with a series of electric pulses to advance the crack front while using a mechanical load to define the crack direction. In effect, the goal is to move a crack in a highly controlled manner in virtually any direction on a sheet or plate. Conceptually, the process is akin to a microsized, tool-less, electromagnetic jigsaw with a kerf measured in microns. As part of the proposed research, the principles of electromagnetic Lorentz force generation, localized heating at the crack-tip due to current-crowding, and mixed mode fracture mechanics will be combined to derive the conditions required to advance and turn the crack using a simple experimental prototype. If successful, the benefit to society of the research will include the emergence of a new manufacturing process for precision-cutting of mesoscale thin sheets and foils of brittle, hard-to-process materials. As such, the process has the potential to serve as a new enabling technology for the nation?s manufacturing base. In addition, this project will integrate research and education by advancing discovery and understanding by graduate students at two American universities.