Measuring variable amplitude loading with fibre optic

AEROTECH VII - Sustainability in Aerospace Engineering and Technology

航空航天工程

Kuntjoro, Wahyu^1,2 ; Ramly, Ramzyzan^1,2 ; Assanah, Najmuddin^2

Aviation Technology Research, Universiti Teknologi MARA, Selangor, Shah Alam

40450, Malaysia^1

Flight Technology and Test Centre (FTTC), Faculty of Mechanical Engineering, Universiti Teknologi MARA, Selangor, Shah Alam

40450, Malaysia^2

关键词: Fatigue failures;    Fatigue loadings;    Fatigue monitoring;    Standard fibers;    Test specimens;    Universal testing machines;    Variable amplitude load;    Variable amplitude loading;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/405/1/012008/pdf
DOI  :  10.1088/1757-899X/405/1/012008

学科分类：航空航天科学

来源: IOP

【 摘 要 】

Cyclic loading is known to be responsible for fatigue failure. The variable amplitude loading is a general type of fatigue load and the most common one in practice. Monitoring of fatigue loading such as variable amplitude loads is commonly conducted using strain gauges. The use of fibre optics like fibre Bragg gratings (FBG) is attractive because this type of sensor is not easily interfered by the electromagnetic fields. Its suitability for measuring accurately the cyclic loadings need to be investigated. This paper is reporting the experiments to investigate the suitability of FBG to measure variable amplitude loadings. FBG test setup using a standard fiber optic measurement system was prepared and the cyclic test was conducted using universal testing machine. The fatigue test specimens used were prepared according to the ASTM E606 standards. The obtained result shows that FBG is able to measure variable amplitude loads and this means that FBG can potentially be used for fatigue monitoring of structures.