Fatigue Damage Sensor

Fatigue Damage Sensor: Improving fatigue lifetime predictions of aluminium high speed craft

de Korte, Coen (TU Delft Mechanical, Maritime and Materials Engineering; TU Delft Ship Hydromechanics and Structures)

den Besten, Henk (mentor)
Kaminski, Mirek (graduation committee)
Morales Napoles, Oswaldo (graduation committee)
Hulskamp, E. (graduation committee)

Delft University of Technology

Marine Technology

2018-12-03

Monitoring fatigue damage is complex because ships are designed to crack after 20 years, and typically cracks will only occur after a long time. A novel fatigue damage sensor has been invented to indicate damage in corresponding aluminium welded joints. Fatigue damage is accelerated by introducing a stress concentration in the sensor w.r.t. the stress in the structure. New in this fatigue damage sensor compared to sensors invented in the past is the fact that this sensor is both in geometry and fatigue damage mechanisms similar to aluminium welded joints. Based on the time it takes for the sensor to crack, a prediction can be made of the expected lifetime of corresponding aluminium welded joints. This prediction is based on the in the VOMAS joint industry project developed Total Stress Concept in which fatigue resistance of all aluminum welded joints is combined in a single SN curve. It was found that with the total stress concept, resistance of welded joints is significantly higher than used in current fatigue design methods. Since the fatigue resistance increases with the total stress concept it is also investigated what the effects of implementing the total stress fatigue resistance curves at Damen would be on the fatigue design of high speed craft.

fatigue damage sensor
high speed craft
Total stress concept

http://resolver.tudelft.nl/uuid:e5d851c5-148c-496f-b57d-0432597988bf

2023-12-03

Student theses

master thesis

© 2018 Coen de Korte