Mechanical Behavior of High-Strength Plastics: Experiments and Modeling

高强度塑料的机械行为：实验和建模

• 批准号: 9114411
• 负责人: Erhard Krempl
• 金额: $ 15.28万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-12-15 至 1994-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9114411&HistoricalAwards=false
• 关键词: Mechanical; Behavior; Strength; Plastics; Experiments

A combined theoretical/experimental study on the deformation behavior of high strength polymeric solids is proposed. The mechanical testing machine capable of exerting uniaxial as well as biaxial loading paths with controlled loading rates. The time-dependent behavior manifested by creep, relaxation and rate sensitivity is of great interest here. Initially we want to complete a uniaxial study of high strength nylon and concurrent microstructural investigations such as x-ray diffraction studies. A fixture to accommodate tubular specimens subjected to axial, torsional and internal pressure loading will be designed and built. Then a new test material will be chosen, preferably from the class of polymeric, anisotropic, liquid crystals such as Xydar or Vectra, on which uniaxial and biaxial testing and microstructural investigations are contemplated. In the theoretical part we propose to model the finite mechanical deformation behavior using state variable theories consisting of coupled nonlinear differential equations. The aim of the research is to combine synergistically phenomenological experiments, microstructural investigations and continuum mechanics to arrive at a mathematical model of the polymeric solid.

变形的理论/实验研究 提出了高强度聚合物固体的性能。 的 也可施加单轴力的机械试验机 作为双轴加载路径与控制加载速率。 的 蠕变、松弛和速率表现出的时间依赖性行为 敏感性在这里很重要。 最初我们想 完成高强度尼龙的单轴研究，同时 微观结构研究如X射线衍射研究。 一种用于容纳经受轴向载荷的管状试样的夹具， 将设计扭转和内压载荷， 建成 然后将选择新的测试材料，优选地从 聚合物、各向异性液晶的种类， Xbracar或Vectra，单轴和双轴测试， 显微结构的研究也在考虑之中。 在 理论部分，我们建议建立有限力学模型， 变形行为，使用状态变量理论，包括 耦合非线性微分方程 的目的 研究是将联合收割机协同现象学 实验、微观结构研究和连续体 力学来达到聚合物的数学模型， 固体