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.

提出了高强度聚合物固体变形行为的理论/实验相结合的研究。 机械试验机能够以受控的加载速率施加单轴和双轴加载路径。 蠕变、松弛和速率敏感性所表现出的时间依赖性行为在这里非常令人感兴趣。 最初，我们希望完成高强度尼龙的单轴研究和并发的微观结构研究，例如 X 射线衍射研究。 将设计和建造一个用于容纳承受轴向、扭转和内压载荷的管状样本的夹具。 然后将选择新的测试材料，最好是从聚合的、各向异性的液晶类别中选择，例如 Xydar 或 Vectra，并考虑在其上进行单轴和双轴测试以及微观结构研究。 在理论部分，我们建议使用由耦合非线性微分方程组成的状态变量理论来模拟有限机械变形行为。 该研究的目的是将现象学实验、微观结构研究和连续介质力学结合起来，得出聚合物固体的数学模型。