Directional Thermal Diffusivity of Deformed Elastomers

变形弹性体的定向热扩散率

• 批准号: 0231574
• 负责人: Neil Wright
• 金额: $ 14.83万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-01-01 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0231574&HistoricalAwards=false
• 关键词: Directional; Thermal; Diffusivity; Deformed; Elastomers

Proposal Number: CTS-0084276Principal Investigator: N. WrightAbstract:The uniaxial thermomechanical response of elastomers has been studied for nearly two centuries, but the multiaxial response has been less studied. The multiaxial mechanical response can yield complex and unique behavior, such as unequal biaxial deformation of sheets of rubber subject to equibiaxial loading. Not surprisingly, complete constitutive models of the elastic response are lacking, largely due to the scarcity of suitable multiaxial data. Scarcer still are multiaxial measurements of thermophysical properties. This project will extend the flash thermal diffusivity method to measure the thermal diffusivity of elastomers subject to multiaxial finite deformation. This extended method will allow for the thermal diffusivity of such materials to be arbitrarily anisotropic. These property measurements and resulting constitutive relations should lead to improved continuum models of the general thermoelastic response of elastomers. Developing new property measurement techniques remains important and relevant even with the increased use of computer modeling, because experiments remain, in most cases, the only method of developing the constitutive relations that the models need. The techniques developed here can be applied to materials other than elastomers, for example composites and biological tissues, whether or not these materials are deformed.

提案编号：CTS-0084276原理研究者：N。Wrightabstract：弹性体的单轴热机械反应已有近两个世纪的研究，但是多用途响应的研究较少。 多轴机械响应可以产生复杂而独特的行为，例如橡胶片的不等性双轴变形，受到肩轴齐还负荷的影响。 毫不奇怪，缺乏弹性响应的完整组成型模型，这主要是由于合适的多轴数据缺乏。 稀缺仍然是热物理特性的多轴测量。 该项目将扩展闪光热扩散方法，以测量经受多轴有限变形的弹性体的热扩散率。 这种扩展的方法将使此类材料的热扩散率任意各向异性。 这些性质测量和由此产生的组成关系应导致弹性体的一般热弹性反应的连续模型改善。 即使使用计算机建模的使用增加，开发新的财产测量技术也仍然重要且相关，因为在大多数情况下，实验仍然是开发模型所需的构成关系的唯一方法。 这里开发的技术可以应用于弹性体（例如复合材料和生物组织）以外的材料，无论这些材料是否变形。