ABSTRACT

This work discusses the development and refinement of a polymer/fibre through thickness reinforcement method. Similar in initial concept to the traditional metalworking process of riveting this allows the manufacture of through thickness reinforced 2-D preforms. Pins are placed with deliberate excess length using a veterinary needle to part in-plane fibres. A lay-up with an array of pins is then subjected to a hot-press process flattening the pin ends resulting in a consolidated preform. This preform exhibits useful characteristics such as the ability to be cut and reformed to a new topology, with the through thickness reinforcement also conforming to the new shape. Refinements to the process introduce a multi-stage press process aimed at improving pin orientation with both original and refined processes evaluated using ASTM D5528 to determine the effect on interlaminar fracture toughness.

摘要

这项工作通过厚度增强方法讨论了聚合物/纤维的开发和改进。最初的概念类似于铆接的传统金属加工工艺，这允许制造厚度增强的二维预成型件。使用兽医针将针放置在故意过长的位置以分离平面内的纤维。然后对具有一系列销的叠层进行热压工艺，使销端变平，从而形成坚固的预成型件。这种预成型件具有有用的特性，例如能够被切割并重新形成新的拓扑结构，并且贯穿厚度的加强件也符合新的形状。