Hybrid Composite-Nanometal-Polymer Structural Systems

混合复合纳米金属聚合物（HCNP）结构是一种新的结构系统，它轻，强，硬，并提供前所未有的设计灵活性，使添加多功能的能力，如变形或声学剪裁。这些结构使用三种先进的制造技术制造，并依赖于复杂的建模和计算优化方法来创建高效的设计。HCNP结构是通过3D打印复杂的桁架状聚合物预制件制造的，该预制件随后使用脉冲电沉积工艺涂覆纳米晶镍、钴或铁，然后用作夹层结构的核心。具有工程刚度的碳纤维复合材料层压板粘附到桁架上以形成夹层结构的面板。这些结构具有许多自由设计变量：在核心中，设计者选择支柱半径、间距和倾斜度;纳米金属涂层厚度、元素组成和粒度分布;以及在面板中，厚度和刚度分布。由于许多设计变量，HCNP结构可以被定制为在结构上是高效的，并且还可以通过附加的功能特性来增强。该研究计划的目标是开发制造，建模和优化功能化HCNP结构系统的方法。该计划将包括四个同时进行的活动，以推进这项研究。首先，将实施与面板和芯体之间的连接相关的制造改进。其次，X射线断层扫描将被用来确定在纳米聚合物桁架核心的故障机制。这将为随后将用于设计的新力学强度模型的创建提供信息。第三，将开发新的变形和声学性能的多物理场模型。第四，机械和多物理场模型将结合在一个计算优化方案中，以确保设计人员能够选择最轻和性能最好的HCNP结构。一旦完成，我们的工业合作伙伴，Integran Technologies，庞巴迪航空航天公司，普惠加拿大公司和MDA公司将获得这些新技术，为加拿大制造商提供技术优势。

Hybrid composite-nanometal-polymer (HCNP) structures are new structural systems that are light, strong and stiff, and offer unprecedented design flexibility that enables the addition of multifunctional capabilities such as morphing or acoustic tailoring. These structures are fabricated using three advanced manufacturing techniques and rely on sophisticated modelling and computational optimisation methods to create efficient designs. The HCNP structures are fabricated by 3D printing a complex truss-like polymer preform which is subsequently coated with nanocrystalline nickel, cobalt or iron using a pulsed electrodeposition process and then used as the core of a sandwich structure. Carbon fibre composite laminates with engineered stiffness are adhered to the truss to form the face sheets of the sandwich structure. These structures have many free design variables: in the core the designer selects the strut radius, spacing and inclination; the nanometal coating thickness, elemental composition and grain size distribution; and in the face sheets the thickness and stiffness distributions. Because of the many design variables, the HCNP structures can be tailored to be highly efficient structurally, and can also be enhanced with additional functional properties. The goal of this research program is to develop methods to fabricate, model and optimise functionalised HCNP structural systems.******This program will consist of four simultaneous activities to advance this research. First, fabrication improvements associated with the connection between the face sheets and the core will be implemented. Second, x-ray tomography will be employed to identify the mechanisms of failure in the nanometal-polymer truss core. This will inform the creation of new mechanical models of strength that will subsequently be used in design. Third, new multiphysics models of morphing and acoustic performance will be developed. Fourth, the mechanical and multiphysics models will be combined in a computational optimisation scheme to ensure that designers are able to select the lightest and best performing HCNP structure possible. Once this is accomplished, our industrial partners, Integran Technologies, Bombardier Aerospace, Pratt & Whitney Canada and MDA Corporation, will have access to these new technologies, providing a technological advantage to Canadian manufacturers.