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

EAGER/协作研究：金属部件的电磁脉冲感应切割 (EPIC)

• 批准号: 1103120
• 负责人: David Bourell
• 金额: $ 5万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-02-01 至 2012-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1103120&HistoricalAwards=false
• 关键词: EAGER; Collaborative; Research; Electromagnetic; Pulse

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.

这一早期概念探索性研究(EIGER)奖的研究目标是展示一种新的制造工艺的概念证明，该制造工艺可以在无需刀具的自由成形方式下切割薄板和板材。这种被称为电磁脉冲诱导切割的过程是基于微裂纹在电磁和机械载荷联合作用下的受控推进。该方法将利用与一系列电脉冲相关的电磁力来推进裂纹前沿，同时使用机械载荷来确定裂纹方向。实际上，目标是以高度受控的方式在板材或板材上的几乎任何方向上移动裂纹。从概念上讲，这一过程类似于一种微型、免工具的电磁拼图，其缺口以微米为单位。作为拟议研究的一部分，将结合电磁洛伦兹力产生原理、由于电流拥挤引起的裂纹尖端的局部加热和混合模式断裂力学来推导使用简单的实验原型推进和扭转裂纹所需的条件。如果研究成功，这项研究的社会益处将包括出现一种新的制造工艺，用于精密切割脆性、难以加工的材料的中尺度薄板和薄片。因此，该工艺有可能成为国家--S制造基地--的一项新的使能技术。此外，该项目将通过促进两所美国大学的研究生发现和理解来整合研究和教育。