University of Twente Student Theses


Structural Health monitoring for landing gears

Boom, R. (2017) Structural Health monitoring for landing gears.

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Abstract:One of the main focus points at Fokker Landing Gear B.V. (FLG) in Helmond is the development and production of landing gear components. A relative new technique has been developed which involves in-flight monitoring. FLG is interested in the applicability and integration of these in-flight monitoring technique, which involves the concept of Structural Health Monitoring (SHM) in a landing gear (LG). Aspects which required special attention were the failure mechanisms of metal as well as composite LG components and how these components are currently inspected by Non-Destructive-Inspection techniques. It became clear that metal components tend to fail due to fatigue and composites would most likely fail due to damage growth after the presence of damage caused by an impact. This revealed two types of failure parameters; loads and damage. In order to monitor these parameters, different monitoring techniques are required. Although a lot of advancements are currently being made in the field of damage detection, there is still a lack in damage monitoring techniques which can detect damage in thick walled structures, such as an LG. This means that the intended functions of SHM cannot be applied to LG's yet This resulted in the development of a flow chart that represents a general foundation for a monitoring system for LG's. By following all steps in this flow chart, the end-user can highly benefit in terms of extended maintenance intervals and a determination of the amount of remaining life. The original equipment manufacturers such as FLG can use this approach by validating the design spectrum, to improve future designs. From this research, it became clear that it would be ideal to be able to use LM as well as SHM on a structure. This would provide even more valuable structural information. The results from this report can be used as a foundation for future research on this topic.
Item Type:Essay (Master)
Faculty:ET: Engineering Technology
Subject:52 mechanical engineering
Programme:Mechanical Engineering MSc (60439)
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