Design and analysis of hybrid joints (bonded and bolted) for aerospace structures

为了使用复合材料制造有用的结构，必须考虑结构部件连接在一起的方式。该项目的目标是开发一种用于连接复合材料结构的螺栓和粘结连接的优化设计方法。当单独分析时，现有的方法既适用于粘结连接，也适用于螺栓连接。结合在一起作为一个节点内的荷载传递机构，问题变得更加复杂。为了避免航天结构的过度设计和重量损失，必须了解相互作用和失效模式。必须明确定义使用组合螺栓/粘合接头的好处，以便该接头选项可以成为合理的设计选择或替代方案。由于大量预期设计变量的潜在复杂性，意味着任何设计方法都将受益于优化技术，以便获得螺栓/粘合接头设计的最佳解决方案。因此，该项目的目标是开发一种用于连接复合结构的组合螺栓和粘结连接的优化设计方法。这是航空航天工业中关节设计的关键问题，由于问题的复杂性，引起了很大的学术兴趣。此外，由于这项研究的应用性质，有很大的潜力可以培养对将来在航空航天部门就业有用的高素质人员。

To make useful structures using composites materials, consideration must be given to the way structural components are joined together. The goal of this project is to develop an optimized design methodology for combined bolted and bonded joints for attaching composite structures. When analyzed independently, there are existing methodologies for both bonded and bolted joints. Combined together as load transfer mechanisms within a joint, the problem becomes more complex. The interactions and failure modes must be understood in order to avoid overdesign and weight penalty in aerospace structures. The benefits of using a combined bolted/bonded joint must be clearly defined so that this joint option can be a logical design choice or alternative. The underlying complexity due to the large number of expected design variables means that any design methodology will benefit from optimization techniques in order to arrive at an optimal solution for the design of bolted/bonded joints. Thus, the goal of this project is to develop an optimized design methodology for combined bolted and bonded joints for attaching composite structures. This is a problem that is essential to design of joints in the Aerospace industry, and is of great academic interest because of the complexity of the problem. Furthermore, there is great potential, due to the applied nature of the research, for training of highly qualified personnel (HQP) that will be useful for future employment in the aerospace sector.