Experimental, Theoretical and Computational Study of Compressed Thin Films Diaphragms

压缩薄膜隔膜的实验、理论和计算研究

• 批准号: 9820823
• 负责人: Alberto Cuitino
• 金额: $ 20万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-08-01 至 2003-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9820823&HistoricalAwards=false
• 关键词: Experimental; Theoretical; Computational; Study; Compressed

Experimental, Theoretical, and Computational Study of CompressedThin-Film DiaphragmsAlberto M. Cuitino and Gustavo Gioia Department of Mechanical & Aerospace Engineering Rutgers University Piscataway, NJ 08854-8058Experimental, theoretical, and computational research is planned tostudy the mechanics of anisotropically compressed thin film diaphragms.The project is motivated by experimental results which indicate thatthe behavior of anisotropically compressed diaphragms is fundamentally different from that of isotropically compressed ones. Thus, in lieu ofthe well-behaved folding patterns which obtain in the isotropic case,the anisotropic case leads to microstructures, i.e. fine foldingpatterns which lack a length scale associated with the boundaryconditions. These microstructures are symptomatic of the spinodalstructure of the underlying energetics.Experimental work will yield quantitative information on the range ofstress states for which folding microstructures occur, the dependence ofmicrostructure configurations on such factors as stress state historyand diaphragm size, and the regularizing effect of bending on foldingrefinement. The theoretical work will allow to determine the appropriateenergy functionals, characterize the associated minimizing sequences,and develop the capability to engineer diaphragms with folding patternssuited to specific purposes. Computational tools will be developed fordetailed comparison with theoretical results, and for use in practicalcases which are not amenable to theoretical treatment.

压缩薄膜膜片的实验、理论和计算研究。Cuitino和Gustavo Gioia机械航天工程系 罗格斯大学 皮斯卡特维，NJ 08854- 8058实验、理论和计算研究计划研究各向异性压缩薄膜膜片的力学。该项目的动机是实验结果表明各向异性压缩膜片的行为与各向同性压缩膜片的行为有根本的不同。因此，代替在各向同性情况下获得的表现良好的折叠图案，各向异性情况导致微观结构，即缺少与边界条件相关联的长度尺度的精细折叠图案。这些微观结构是潜在的能量学的spinodalstructure的症状。实验工作将产生的定量信息的范围ofstress状态的折叠微观结构发生，依赖于微观结构配置等因素，如应力状态的历史和隔膜的大小，和正规化的影响，弯曲foldenefinement。理论工作将允许确定适当的能量泛函，表征相关的最小化序列，并开发能力，工程师与折叠patternssuitable特定用途的隔膜。计算工具将被开发用于与理论结果的详细比较，并用于不适合理论处理的实际情况。