Mathematical Sciences: Analysis of Constitutive Relations and Transport Properties for Composites with Applications toProblems of Optimal Structural Design
Mathematical Sciences: Analysis of Constitutive Relations and Transport Properties for Composites with Applications toProblems of Optimal Structural Design
批准号:
9205158
负责人:
Robert Lipton
金额:
$4.69万
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
1992
资助国家:
美国
项目状态:
已结题
起止时间:
1992-07-01 至 1994-12-31
中文摘要
本项目将重点分析复合材料的传输特性和本构关系,并将其应用于结构优化设计问题。将为复合系统开发改进的界限和自洽的估计。所考虑的复合材料类型包括对称的两相弹性复合材料、部分脱粘的两相弹性复合材料、具有相间表面电阻的两相导热介质以及考虑表面张力效应的两种Stokes流体的随机乳状液。本课程将采用新的数学技巧,包括零拉格朗日、弱下半连续泛函和对偶变分原理的新应用。这些预期的结果以及现有的理论将被应用于结构优化设计问题的数值求解。这里所考虑的优化设计问题是在随机静载荷系综下的复合材料系统的最大强度设计问题。许多现代优化结构设计结合了复合材料的使用。这项研究的目的是利用组合系统表征方面的最新进展来促进最优结构设计问题的解决。预期的应用包括海上石油平台的设计、承受风荷载的大型结构和大型空间结构。
英文摘要
This project will focus on the analysis of transport properties and constitutive relations of composite materials and their application to problems of optimal structural design. Improved bounds and self consistent estimates will be developed for composite systems. The types of composites considered are two phase elastic composites with symmetry, partially debonded two phase elastic composites, two phase thermal conducting media with surface resistance between phases, and random emulsions of two Stokes fluids incorporating surface tension effects. New mathematical techniques involving new applications of null lagrangians, weakly lower semicontinuous functionals, and dual variational principles will be employed. These anticipated results as well as the existing theory will be applied to the numerical solution of optimal structural design problems. The optimal design problem considered here is the previously untreated problem of maximum strength design of composite systems subject to an ensemble of random static loads. Many modern optimal structural designs incorporate the use of composite materials. The goal of the proposed research is to utilize the most recent advances in the characterization of composite systems to facilitate solution of problems of optimal structural design. Anticipated applications include design of offshore oil platforms, large structures subjected to wind loads, and large space structures.
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依托单位:
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依托单位:
国内基金
海外基金
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