Three-Dimensional Modeling of Magnetic Shape Memory Alloys

磁性形状记忆合金的三维建模

• 批准号: 1101108
• 负责人: Constantin Ciocanel
• 金额: $ 33.25万
• 依托单位: Northern Arizona University
• 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: 2011-09-01 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1101108&HistoricalAwards=false
• 关键词: Three; Dimensional; Modeling; Magnetic; Shape

The research objective of this grant is to establish a general three-dimensional model capable of predicting the stress-strain-magnetization behavior of magnetic shape memory alloys under any type of magnetic and/or mechanical loading. Magnetic shape memory alloys are unique because they experience a recoverable strain when exposed to a magnetic field as internal martensitic variants reorient. The challenges associated with modeling these materials include, but are not limited to, determining when the variants reorient and the direction of reorientation under any loading. As an initial step towards a three-dimensional model, a complete model for any two-dimensional magneto-mechanical loading is needed. In order to better understand these alloys and to assist with the modeling, all qualitatively different biaxial load cases with compressive stress and/or magnetic field will be tested experimentally. The materials, methodologies, and results of this research will be integrated in the Adaptive Materials and Systems course taught by the principal investigator, providing students with unique training in magnetically adaptive materials. The results of this project will be presented to peers at technical conferences, to students and faculty at Northern Arizona University, and to the general population during the annual Flagstaff Festival of Science, as well as published in journals and conference proceedings. Finally, this work will create a means of predicting the behavior of magnetic shape memory alloys subject to complex loads, which will give engineers insight into potential applications of these alloys and a robust tool for the design of devices that include magnetic shape memory alloys.

本基金的研究目标是建立一个通用的三维模型，能够预测任何类型的磁和/或机械载荷下的磁性形状记忆合金的应力-应变-磁化行为。磁性形状记忆合金是独特的，因为它们在暴露于磁场时经历可恢复的应变，因为内部马氏体变体重新取向。 与这些材料建模相关的挑战包括但不限于确定变体何时重新定向以及在任何载荷下重新定向的方向。作为建立三维模型的第一步，需要一个用于任何二维磁机械负载的完整模型。为了更好地理解这些合金并协助建模，将对具有压应力和/或磁场的所有定性不同的双轴载荷情况进行实验测试。 本研究的材料，方法和结果将被整合到由首席研究员教授的自适应材料和系统课程中，为学生提供磁自适应材料的独特培训。 该项目的成果将在技术会议上向同行、向北方亚利桑那大学的学生和教师以及在一年一度的弗拉格斯塔夫科学节期间向公众展示，并发表在期刊和会议论文集上。 最后，这项工作将创造一种预测磁性形状记忆合金在复杂载荷下的行为的方法，这将使工程师深入了解这些合金的潜在应用，并为设计包括磁性形状记忆合金的设备提供一个强大的工具。