Damage tolerant ultralightweight mechanical metamaterials (MMs) for the next-generation large scale all-electric aircrafts

用于下一代大型全电动飞机的耐损伤超轻机械超材料（MM）

• 批准号: 2883275
• 金额: --
• 依托单位: Queen Mary University of London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2883275
• 关键词: Damage; tolerant; ultralightweight; mechanical; metamaterials

Aviation emissions accounted for 7% of UK Greenhouse Gas emissions in 2018, which suggests electrification could have a large impact on decarbonizing the aviation sector. The successful realization of large scale all-electric aircraft architectures is heavily dependent on breakthrough in high-performance structural materials to overcome the various limitations faced by the conventional materials. Mechanical metamaterials (MMs) are a group of man-made architected materials that can be tailored to achieve unprecedented mechanical properties and multifunctionality through geometric arrangements rather than material properties of the constituents. The proposed research aims to establish a feasible design route to create damage tolerant ultralightweight mechanical metamaterials (MMs) for the next-generation large scale all-electric aircrafts. Damage tolerance is a fundamental requirement for high performance structural materials. Structural materials are expected to (i) fail in a progressive manner that can give warning to failure events, and (ii) have good load bearing capacity with presence of flaws. Natural cellular materials, such as marine mussels, honeycombs, woods, trabecular bones, plant parenchyma and sponges, benefit from the disorderliness within their internal microstructures to achieve highly damage tolerant behaviours. Inspired by this, the objectives of this research are to (1) open up a novel design pathway for damage tolerant ultralightweight MMs by engineering controlled degrees of disorderliness into initially periodic, ordered metamaterial systems. The initiative will be supported by novel, mechanics informed data-driven approaches that can tune the distribution of disorderliness within the MMs, (2) design new classes of ultralightweight MMs with high damage tolerance, (3) establish the design principles of high performance, damage tolerant ultralightweight MMs, and (4) evaluate the effectiveness for multifunctional applications of MMs for all-electric aircraft architectures.

2018年，航空排放量占英国温室气体排放量的7%，这表明电气化可能对航空业脱碳产生重大影响。大型全电动飞机结构的成功实现很大程度上依赖于高性能结构材料的突破，以克服传统材料面临的各种限制。机械超材料（MM）是一组人造建筑材料，可以通过几何排列而不是成分的材料属性来定制以实现前所未有的机械属性和多功能性。拟议的研究旨在建立可行的设计路线，为下一代大型全电动飞机制造耐损伤超轻机械超材料（MM）。损伤容限是高性能结构材料的基本要求。结构材料预计会（i）以渐进的方式失效，从而可以对失效事件发出警告，并且（ii）在存在缺陷的情况下具有良好的承载能力。天然细胞材料，如海洋贻贝、蜂窝、木材、小梁骨、植物薄壁组织和海绵，受益于其内部微观结构的无序性，以实现高度耐损伤的行为。受此启发，本研究的目标是（1）通过将受控的无序程度设计到最初周期性的有序超材料系统中，为耐损伤超轻量MM开辟一条新颖的设计途径。该计划将得到新颖的、以力学为基础的数据驱动方法的支持，这些方法可以调整MM内的无序性分布，(2)设计具有高损伤容限的新型超轻量MM，(3)建立高性能、损伤容限超轻量MM的设计原则，以及(4)评估MM在全电动飞机架构中多功能应用的有效性。