Stress analysis and vibration of elastic and viscoelastic systems (Composite materials and structures)

弹性和粘弹性系统的应力分析和振动（复合材料和结构）

• 批准号: 413-2012
• 负责人: Hoa, SuongVan
• 金额: $ 3.28万
• 依托单位: Concordia University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=568119
• 关键词: Stress; analysis; vibration; elastic; viscoelastic

The first objective of this research program is to provide an integrated design and manufacturing procedure for the development of advanced composite structures that offer high performance, cost efficiency, low wastage, and sensing capability that can detect and locate the occurrence of damages in-situ. The second objective is the development of composite structures that have variation in fiber orientation within a layer (in addition to changes in fiber orientation across layers). The work for the first objective will involve the incorporation of nanoparticles into the matrix resin of the polymer composites to enhance the fracture toughness, electrical conductivity, and thermal conductivity of the polymer matrix. This modified polymer matrix is then incorporated into long fibers such as carbon fibers, and glass fibers using a prepreg machine. The combined modified matrix and fibers will be processed using automated fiber placement machine to make composite structures of common shapes such as plates, shells or tubes. The use of machines for processing improves the uniformity of the material properties throughout the structure. The enhanced electrical conductivity of the materials will be utilized to provide sensing capability. This sensing capability will enable the detection and location of incurring damages while the structure is in operation (i.e. in-situ or in-flight damage detection and location). The advantage of this method as compared to current NDT technologies is that the material is sensitive at every point in the structure, which makes the sensing to be universal, rather than local. The work for the second objective will involve the steering of fibers within a layer. This allows the ability to vary the fiber orientation not only across the layers but also within a layer. Optimizaton procedure will be developed to augment the capability of composite structures using this new approach. The use of automated fiber placement machine allows the manufacturing of such a structure. Testing will be done to validate the theories. Step advances for composite materials and structures developments will be made.

该研究计划的第一个目的是为开发高性能，成本效率，低浪费和感应能力的高级复合结构提供集成的设计和制造程序，以检测和定位损害赔偿的情况。第二个目标是复合结构的发展，这些结构在层中具有变化的纤维取向（除了跨层的纤维取向的变化外）。 第一个目标的工作将涉及将纳米颗粒掺入聚合物复合材料的基质树脂中，以增强聚合物基质的断裂韧性，电导率和导热率。然后将此改良的聚合物基质掺入使用预放量机的碳纤维等长纤维，例如碳纤维和玻璃纤维。合并的修饰矩阵和纤维将使用自动纤维放置机进行处理，以制造诸如板，壳或管等常见形状的复合结构。使用机器来处理机器可以改善整个结构中材料特性的均匀性。 将利用材料的增强电导率来提供感应能力。该感应能力将在结构运行时（即原地或飞行中的损害检测和位置），可以检测和位置发生损坏。与当前的NDT技术相比，该方法的优点在于，该材料在结构的每个点都敏感，这使得传感是通用的，而不是局部的。 第二个目标的工作将涉及一层纤维的转向。这使得能够不仅可以在整个层上而且在一层内改变光纤取向。将开发优化程序，以使用这种新方法来增强复合结构的能力。使用自动纤维放置机可以制造这种结构。 测试将进行验证理论。将进行复合材料和结构发展的步骤进展。