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Manufacture, characterisation, and optimisation of WrapToR stiffened skin panels for aerospace applications

用于航空航天应用的 WrapToR 加固蒙皮板的制造、表征和优化

基本信息

批准号：
2273502
负责人：
金额：
--
依托单位：
University of Bristol
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2019
资助国家：
英国
起止时间：
2019 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2273502
关键词：
Manufacture characterisation optimisation WrapToR stiffened

项目摘要

This PhD will pioneer the use of highly efficient composite truss structures as reinforcement members for composite panels, with a particular focus on applications in the aerospace industries.The patented wrapped tow reinforced (WrapToR) truss concept currently being researched at the University of Bristol has already been proven capable of producing low cost, consistent truss beam structures with a quick and simple fabrication process. An adapted filament winding technique allows continuous carbon fibre tow to be laid down as the shear elements, reducing the need for many individual members and automating much of the manufacturing. Previous work has already shown that these beams exhibit far superior stiffness and strength properties when compared to alternative structures of similar mass under a variety of loading conditions. To date, research on this novel composite truss concept has focused on its use as beams and space frames, with the human powered helicopter Gamera II utilising the low mass and high stiffness properties of WrapToR trusses to break several FIA world records in human powered flight. The next step in developing this exciting technology is to integrate these naked beams and frames into closed panel structures to explore their use as reinforcement members. WrapToR reinforcement of skin panels has the potential to offer lower mass and higher stiffness and strength than alternative monolithic stiffening methods through exploitation of the excellent structural efficiency of trusses. This project aims to use a multi-disciplinary approach to characterise and optimise the application of the WrapToR truss concept as a reinforcement member for structural panels, to demonstrate that WrapToR stiffened skin panels can improve the mechanical performance of aerospace vehicles such as rockets and reusable space planes, for a low mass budget. To achieve this aim, several objectives of increasing complexity have been planned out as shown below.- Initially, a stiffened flat panel unit cell will be fabricated and tested to characterise its mechanical performance and validate models currently being developed.- Secondly, validated models and optimisation algorithms will be used to design a larger, optimised flat panel structure to allow for comparative analysis of mechanical performance to alternative structures such as sandwich panels.- Thirdly, the work will move from flat panel geometry to more complex curved geometry, with a curved stiffened panel demonstrator unit built and tested for stiffness and strength. Further development of models will be used for validation.- Finally, a scaled down, curved stiffened structure will be designed, built, and tested for stiffness and strength to demonstrate the true potential of this novel technique. This scaled structure will replicate a relevant space or aerospace application to provide meaningful performance data that can be compared to current industry standards of panel stiffening.Although this work will focus on aerospace vehicle structures, this concept would be suitable for a much wider range of industries and applications. From trains, planes, and rockets, to fuel tanks, ships, and wind turbine blades, where there is a need for mass efficiency in reinforcement, WrapToR stiffened skin panels can lead the way for the next generation of structural reinforcement.

该博士将率先使用高效的复合桁架结构作为复合板的增强构件，特别关注航空航天工业的应用。布里斯托大学目前正在研究的专利缠绕丝束增强（WrapToR）桁架概念已经被证明能够以快速简单的制造工艺生产低成本，一致的桁架梁结构。一种经过调整的纤维缠绕技术允许连续的碳纤维丝束作为剪切元件铺设，减少了对许多单独构件的需求，并使大部分制造过程自动化。以前的工作已经表明，这些梁表现出优越的上级的刚度和强度性能时，在各种负载条件下，类似的质量的替代结构相比。迄今为止，对这种新型复合材料桁架概念的研究主要集中在其作为梁和空间框架的用途上，人力直升机Gamera II利用WrapToR桁架的低质量和高刚度特性打破了FIA在人力飞行中的多项世界纪录。开发这项令人兴奋的技术的下一步是将这些裸露的梁和框架集成到封闭的面板结构中，以探索它们作为加固构件的用途。通过利用桁架的优异结构效率，蒙皮板的WrapToR加固具有比替代的整体加强方法提供更低的质量和更高的刚度和强度的潜力。该项目旨在使用多学科方法来验证和优化WrapToR桁架概念作为结构板加强构件的应用，以证明WrapToR加筋蒙皮板可以提高航空航天器的机械性能，如火箭和可重复使用的航天飞机，质量预算较低。为了实现这一目标，已经计划了几个日益复杂的目标，如下所示。最初，将制造和测试加强平板单元，以验证其机械性能并验证目前正在开发的模型。其次，经过验证的模型和优化算法将用于设计更大的优化平板结构，以允许对替代结构（如夹层板）的机械性能进行比较分析。第三，工作将从平板几何形状转向更复杂的弯曲几何形状，建造弯曲加筋板演示装置并对其刚度和强度进行测试。模型的进一步开发将用于验证。最后，将设计、建造一个按比例缩小的弯曲加强结构，并对其刚度和强度进行测试，以展示这种新技术的真正潜力。这种按比例缩放的结构将复制相关的空间或航空航天应用，以提供有意义的性能数据，这些数据可以与当前的板加强工业标准进行比较。虽然这项工作将集中在航空航天飞行器结构上，但这一概念将适用于更广泛的工业和应用。从火车、飞机和火箭，到油箱、船舶和风力涡轮机叶片，在这些需要质量效率的加固领域，WrapToR加筋蒙皮板可以引领下一代结构加固的方向。