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.

这项研究计划的第一个目标是为开发先进的复合材料结构提供一个完整的设计和制造程序，这些结构具有高性能、低成本、低损耗和能够在现场检测和定位损伤发生的传感能力。第二个目标是开发具有层内纤维取向变化(除了层间纤维取向变化之外)的复合结构。 第一个目标的工作将涉及将纳米颗粒加入到聚合物复合材料的基质树脂中，以提高聚合物基质的断裂韧性、导电性和导热性。然后使用预浸机将这种改性的聚合物基质结合到长纤维中，例如碳纤维和玻璃纤维中。将使用自动纤维铺放机处理组合的改性基质和纤维，以制造常见形状的复合材料结构，如板材、贝壳或管子。使用机器进行加工改进了整个结构中材料性能的一致性。材料的导电性增强将被用来提供传感能力。这种传感能力将能够在结构运行时检测和定位发生的损坏(即原地或飞行中的损坏检测和定位)。与目前的无损检测技术相比，这种方法的优点是材料在结构中的每个点都是敏感的，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层内光纤的转向。这使得不仅能够在各层之间而且在层内改变纤维取向。使用这种新方法，将开发优化程序以增强复合材料结构的能力。自动纤维铺放机的使用允许制造这样的结构。将进行测试以验证理论。复合材料和结构的发展将取得阶段性进展。