ABSTRACT

Currently applied manufacturing technologies for hollow composite structures impose design restrictions, such as limited integration potential, whereas differential designs are limited regarding lightweight design and load transfer due to the need of joints. This paper introduces the patented concept of structural carbon fibre-reinforced polymer (CFRP) cores, intending to overcome limitations allowing for integral, yet complex designs. The hollow cores are initially manufactured and partially cured via resin transfer moulding (RTM) with inflatable rubber core. These cores are then integrated in a dry textile-based preform which is impregnated in another RTM process. Here, the cores stabilize the preform during injection and afterwards remain in the component as load-carrying elements. Thereby the partial degree of cure of the cores before the second RTM process is optmised to balance dimensional stability and bonding strength. The process route using structural CFRP cores was successfully applied to a generic structure and proven by structural testing.

摘要

目前应用的中空复合结构制造技术施加了设计限制，例如有限的集成潜力，而由于需要接头，差分设计在轻量化设计和载荷传递方面受到限制。本文介绍了结构碳纤维增强聚合物 (CFRP) 芯的专利概念，旨在克服允许集成但复杂设计的限制。空心芯最初是通过树脂传递模塑 (RTM) 与充气橡胶芯制造和部分固化的。然后将这些芯集成到干燥的基于纺织品的预制件中，该预制件在另一个 RTM 工艺中浸渍。在这里，芯在注射过程中稳定预制件，然后作为承载元件保留在组件中。因此，在第二次 RTM 工艺之前，芯的部分固化程度被优化以平衡尺寸稳定性和粘合强度。使用结构 CFRP 芯的工艺路线已成功应用于通用结构，并通过结构测试得到验证。