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Development of Bonded Joint Technology for a Rigidizable-Inflatable Deployable Truss

机译：刚性可充气可展开桁架的粘结联合技术的发展

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Microwave and Synthetic Aperture Radar antenna systems have been developed as instrument systems using truss structures as their primary support and deployment mechanism for over a decade. NASA Langley Research Center has been investigating fabrication, modular assembly, and deployment methods of lightweight rigidizable/inflatable linear truss structures during that time for large spacecraft systems. The primary goal of the research at Langley Research Center is to advance these existing state-of-the-art joining and deployment concepts to achieve prototype system performance in a relevant space environment. During 2005, the development, fabrication, and testing of a 6.7 meter multi-bay, deployable linear truss was conducted at Langley Research Center to demonstrate functional and precision metrics of a rigidizable/inflatable truss structure. The present paper is intended to summarize aspects of bonded joint technology developed for the 6.7 meter deployable linear truss structure while providing a brief overview of the entire truss fabrication, assembly, and deployment methodology. A description of the basic joint design, surface preparation investigations, and experimental joint testing of component joint test articles will be described. Specifically, the performance of two room temperature adhesives were investigated to obtain qualitative data related to tube folding testing and quantitative data related to tensile shear strength testing. It was determined from the testing that a polyurethane-based adhesive best met the rigidizable/inflatable truss project requirements.
机译：微波和合成孔径雷达天线系统已发展成为使用桁架结构作为其主要支撑和部署机制的仪器系统，已有十多年的历史。在此期间，美国宇航局兰利研究中心一直在研究大型航天器系统的轻质可硬化/可充气线性桁架结构的制造，模块化组装和部署方法。 Langley研究中心的主要研究目标是推进这些现有的最新连接和部署概念，以在相关的空间环境中实现原型系统的性能。在2005年期间，在Langley研究中心进行了6.7米的多机架可展开线性桁架的开发，制造和测试，以展示可硬化/可充气桁架结构的功能和精度指标。本文旨在总结为6.7米可展开线性桁架结构开发的粘结接头技术的各个方面，同时提供整个桁架制造，组装和展开方法的简要概述。将描述基本的接头设计，表面准备研究以及零件接头测试物品的实验接头测试的描述。具体而言，研究了两种室温胶粘剂的性能，以获得与试管折叠测试有关的定性数据和与拉伸剪切强度测试有关的定量数据。通过测试确定，聚氨酯基胶粘剂最能满足可刚性/可充气桁架项目的要求。

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