WrapToR hierarchical space frames made from natural material composites

由天然材料复合材料制成的 WrapToR 分层空间框架

• 批准号: 2738821
• 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: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2738821
• 关键词: WrapToR; hierarchical; space; frames; made

Trusses and space frames are some of the most efficient structural configurations developed to date. They achieve very high levels of performance through taking advantage of highly non-linear structural scaling laws by putting small amounts of material into localised members which are spaced far away from each other, allowing them to balance large forces and bending moments with minimal stress. Such structures are typically made from metals, which provide very good performance, but require large amounts of energy and resources to extract, smelt, and form. If such structures could instead be made from natural materials then their environmental impact could be significantly lowered and they could be adopted to a much wider range of applications. However, natural materials tend to have lower mechanical performance than metallic or traditional composite solutions. One potential way of mitigating the lower mechanical properties is to further exploit geometry by creating truss structures made from members which are themselves trusses. These Hierarchical Space Frames have been shown to be very promising in previous initial work with carbon fibre composite materials, and applying them to natural materials is made tenable through adoption of a patented truss beam manufacturing method being developed at Bristol, the Wrapped Tow Reinforced (WrapToR) truss manufacturing approach.WrapToR trusses are made by using a simple adaptation of filament winding that wraps pre-made longitudinal members in a wetted composite tow to produce a rigid web of shear members when cured. These truss beams can then be made into Hierarchical Space Frames by assembling them with joint structures. This, alongside the innate hierarchical makeup of natural materials, would create a synergistic order of hierarchy from the global structure down to the material level. WrapToR trusses and spaceframes made from natural materials are currently a promising but unexplored area of research, and practical, cost effective methods for joining WrapToR beams need to be developed. This work aims to develop the WrapToR method to devise a sustainable and low cost process for producing trusses and spaceframes from natural materials. To fulfil this aim the following objectives are set:- Develop the WrapToR method to maximise structural performance of natural material truss structures, aiming to account for and exploit the unique features of natural materials. - Experimental testing of natural material WrapToR trusses to characterise unique behaviour that is produced as a result of natural materials being used, that may differ from previously tested WrapToR trusses. Determining key relationships between structural performance, structural failure, material properties and truss geometry. Then using computational modelling and optimisation to design both individual trusses and Hierarchical Space Frames.- Investigate relevant, existing contemporary and traditional methods for joining trusses and beams in order to develop a practical and cost-effective process for joining individual WrapToR trusses into hierarchical space frames.These objectives will culminate with the manufacture of a full-scale natural material WrapToR Hierarchical Space Frame demonstrator for a relevant, real world application that can be tested under realistic loading conditions.

桁架和空间框架是迄今为止开发的一些最有效的结构配置。他们通过将少量材料放入彼此之间的局部构件中，通过利用高度非线性的结构缩放定律来实现很高的性能，从而使他们能够平衡较大的力量和弯曲时刻的压力最小。这样的结构通常是由金属制成的，这些金属提供了很好的性能，但需要大量的能量和资源来提取，闻和形式。如果可以用天然材料制成这样的结构，那么它们的环境影响可能会大大降低，并且可以采用更广泛的应用。但是，天然材料的机械性能往往比金属或传统复合解决方案低。缓解较低机械性能的一种潜在方法是通过创建由桁架本身就是桁架的成员制成的桁架结构来进一步利用几何形状。 These Hierarchical Space Frames have been shown to be very promising in previous initial work with carbon fibre composite materials, and applying them to natural materials is made tenable through adoption of a patented truss beam manufacturing method being developed at Bristol, the Wrapped Tow Reinforced (WrapToR) truss manufacturing approach.WrapToR trusses are made by using a simple adaptation of filament winding that wraps pre-made longitudinal members in a wetted composite tow to治愈后，生成剪切成员的僵硬网络。然后，可以将这些桁架梁通过将关节结构组装到分层空间框架中。这与天然天然材料的先天层次结构构成，将创建从全球结构到材料层面的层次结构的协同顺序。当前，由天然材料制成的桁架和空间框架目​​前是一个有前途但尚未开发的研究领域，需要开发可加入环形梁的实用，具有成本效益的方法。这项工作旨在开发塑料方法，以设计一种可持续和低成本的过程，用于生产天然材料的桁架和空间框架。为了实现此目标，设定了以下目标： - 开发塑料方法以最大程度地提高天然材料桁架结构的结构性能，旨在考虑和利用天然材料的独特特征。 - 对天然材料环形桁架的实验性测试来表征由于使用天然材料而产生的独特行为，这可能与先前测试的晶状体桁架不同。确定结构性能，结构性故障，材料特性和桁架几何形状之间的关键关系。然后使用计算建模和优化设计单个桁架和分层空间框架。-调查相关的，现有的当代和传统方法，用于连接桁架和光束，以开发一个实用且具有成本效益的过程，以将单个环境桁架加入层次空间框架中，这些目标将与这些相关的型号供应，以使其与制造商的相关型号的自然物质工具架起完整的天然框架。可以在逼真的加载条件下测试的应用。