SBIR Phase I: Blind Fastener Inflation for Structural Joining of Aluminum and Titanium

9860212 这个小型企业创新研究（SBIR）第一阶段项目将评估一种被认为上级铆接接头的盲结构紧固技术。 铆接是装配铝和钛合金机身结构的首选方法;然而，该工艺要求高载荷和进入结构两侧。 第一阶段将分析和测试结构连接的低冲击紧固件膨胀方法的机械性能。 这种方法只需要进入结构的一侧，大大简化了紧固件的安装。 第一阶段项目将进行：紧固件安装力学的数值分析;验证紧固件载荷和变形的实验;以及测试紧固试样的强度。 设计规格将制定为低成本的紧固件和紧凑，低冲击紧固工具，适合手动或机器人安装。 机身装配是军用和商用飞机的主要成本。 这种紧固件技术有望将手工机身制造成本减半，并可用于自动化，灵活的制造环境。 它最终可能会扩展到紧固各种铝，钛和复合材料结构的汽车，运输和土木工程结构。

9860212 This Small Business Innovative Research (SBIR) Phase I project will evaluate a blind structural fastening technique that is thought to be superior to riveted joints. Riveting is the preferred method for assembly of load-bearing aluminum and titanium airframe structures; however, this process requires high loads and access to both sides of the structure. Phase I will analyze and test the mechanical performance of a low-impact fastener inflation approach for structural joining. This approach requires access to only one side of a structure, greatly simplifying fastener installation. The Phase I project will perform: numerical analysis of the mechanics of fastener installation; an experiment to verify fastener loads and deformation; and test the strength of fastened test coupons. Design specifications will be made for a low-cost fastener and a compact, low-impact-fastening tool suited for manual or robotic installation. Airframe assembly is a major cost of military and commercial aircraft. This fastener technology is expected to halve the cost of manual airframe fabrication and can be used in an automated, flexible-manufacturing environment. It may eventually be extended to fastening of a wide variety of aluminum, titanium, and composite structures for automotive, transport, and civil engineering structures.