Thermomechanical Analysis of Functionally Graded Shape Memory Alloys

功能梯度形状记忆合金的热机械分析

• 批准号: 0071491
• 负责人: Adrienne Lavine
• 金额: $ 22.95万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-07-15 至 2004-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0071491&HistoricalAwards=false
• 关键词: Thermomechanical; Analysis; Functionally; Graded; Shape

This research program addresses functionally graded thin film shapememory material (nickel titanium) being produced at UCLA. Shapememory alloys have the property that they return to a memorizedshape when heated. The material developed at UCLA has the uniquecapability of two-way actuation, that is it returns to a secondshape when cooled. This project will develop a thermomechanical modelfor this new material, consisting of a thermal model, a mechanicalmodel, a constitutive relation, and a phase transformation model.This research will enable the design of shape memory alloy devices.For example, it may make it possible to produce small devices on thesurfaces of aircraft to reduce drag or control flight. It will enablethe development of new MEMS (micro-electro-mechanical systems)devices. This advancement may be especially valuable in biomedicalapplications since nickel titanium is biocompatible.

这项研究计划针对加州大学洛杉矶分校生产的功能梯度薄膜形状记忆材料(镍、钛)。形状记忆合金具有这样的特性，即当加热时，它们会返回到记忆中的形状。加州大学洛杉矶分校开发的这种材料具有独特的双向致动能力，即当冷却时，它会返回到第二形状。该项目将为这种新材料开发一个热力学模型，包括热模型、力学模型、本构关系和相变模型。这项研究将使形状记忆合金器件的设计成为可能。例如，它可能使在飞机表面制造小型器件以减少阻力或控制飞行成为可能。它将使新的MEMS(微型机电系统)设备的开发成为可能。这一进展在生物医学应用中可能特别有价值，因为镍钛具有生物相容性。