This thesis investigates matrix microcracking behaviour in thermoplastic composites at various temperatures, with a focus on Toray Cetex TC1225, a high-performance thermoplastic composite material reinforced with carbon fibres. The research examines the feasibility of using room temperature data to predict low-temperature performance, to minimize the need for extensive cryogenic testing. Both experimental and analytical methods are used to assess how mechanical properties and residual stresses influence microcracking. Comprehensive testing at room and low temperatures (-65°C) was conducted, with the resulting correlations analysed in detail. The findings of this study contribute to the development of more reliable cryogenic storage solutions, particularly

Training in realistic conditions is crucial for fighter pilots. During this training, a red air team is used to represent adversary threats. Currently, the red air team is made up of friendly aircraft that mimic the tactics of the expected adversaries. However, this method has its limitations, such as that these friendly aircraft do not correctly mimic the performance and detectable emissions of the real adversary aircraft. Furthermore, using real combat aircraft has other downsides. They require active fighters and pilots that require expensive training, and using real aircraft means that these expensive combat aircraft need to spend a lot of their service life filling the role of red air instead of flying real missions. As red air flying hours are not considered to be useful training for the pilots flying them, there is no need for using combat-ready aircraft that can carry real armament, nor for a pilot in the cockpit. Using real combat aircraft has other extensive costs attached to it and is unsustainable looking at its real intended purpose. Just to have a real combat aircraft in the red air fleet requires acquisition of the aircraft, taking it away from active service that it was designed for. It needs a (ground)crew to operate it. It also needs lots of maintenance, requiring mechanics, engineers, tools, hardware, and much more. All of this and the combat aircraft is not used for its designed capabilities in flag missions when it is part of the red team. Therefore, there is a desire for a UAV that can match the performance of the real adversaries, is less expensive to operate, and is more sustainable than the current alternatives to fill the role of red air...