scholarly journals Reliability Analysis of CFRP-Packaged FBG Sensors Using FMEA and FTA Techniques

2021 ◽  
Vol 11 (22) ◽  
pp. 10859
Author(s):  
Zheng Liu ◽  
Yongjie Li ◽  
Nan Zhang ◽  
Zhongwei Liang ◽  
Fangyi Li
Keyword(s):  
Reliability Analysis ◽  
Turbine Blades ◽  
Fault Tree Analysis ◽  
Complex Stress ◽  
Structural Testing ◽  
Wind Turbine Blades ◽  
Reinforced Plastics ◽  
Working Environments ◽  
Fbg Sensors ◽  
Important Basis

Carbon fiber-reinforced plastics (CFRP)-packaged fiber Bragg grating (FBG) sensors are widely used in full-scale structural testing of wind turbine blades (WTBs). However, the specific process to make CFRP-packaged FBG sensors, such as packaging, bonding, welding, etc., are mainly manually operated, and no unified standard or rule has been formed yet. Non-standard specific processes, coupled with complex stress distribution, unstable working environments, etc., result in the CFRP-packaged FBG sensors having various failures with time, resulting in inaccurate measurements. Thus, the need to carry out related failure analysis is urgent. This paper therefore performed a reliability analysis for CFRP-packaged FBG sensors using failure mode and effects analysis (FMEA) and fault tree analysis (FTA) techniques. The results provide an important basis towards analyzing performance degradation and functional failures for CFRP-packaged FBG sensors.

Predictions of Structural Testing Characteristics for Wind Turbine Blades

2009 ◽  
Author(s):  
Michael Desmond ◽  
Darris White
Keyword(s):  
Wind Turbine ◽  
Fatigue Testing ◽  
Turbine Blades ◽  
Structural Testing ◽  
Wind Turbine Blades ◽  
Static Testing ◽  
Extreme Load ◽  
Design Loads ◽  
Certification Requirements ◽  
Blade Loads

Static and fatigue structural testing of wind turbine blades provides manufacturers with quantitative details in order to improve designs and meet certification requirements. Static testing entails applying extreme load cases through a combination of winches and weights to determine the ultimate strength of the blade while fatigue testing entails applying the operating design loads through forced hydraulics or resonant excitation systems over the life cycle of the blade to determine durability. Recently, considerable efforts have been put forth to characterize the reactions of wind turbine blades during structural testing in order to develop load and deflection predictions for the next generation of blade test facilities. Incorporating years of testing experience with historical test data from several wind turbine blades, curve fits were developed to extrapolate properties for blades up to one hundred meters in length. Furthermore, conservative assumptions were employed to account for blade variations due to inconsistent manufacturing processes. In short, this paper will outline the predictions of wind turbine blade loads and deflections during static and fatigue structural testing.

A review of full-scale structural testing of wind turbine blades

2014 ◽  
Vol 33 ◽  
pp. 177-187 ◽  
Author(s):  
H.F. Zhou ◽  
H.Y. Dou ◽  
L.Z. Qin ◽  
Y. Chen ◽  
Y.Q. Ni ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Full Scale ◽  
Structural Testing ◽  
Wind Turbine Blades

Mechanical Testing of GFRP Composite Materials Used in Wind Turbine Blades Construction

2020 ◽  
Vol 1157 ◽  
pp. 142-148
Author(s):  
Ciprian Morăraș ◽  
Catalin Andrei Tugui ◽  
Rozina Steigmann ◽  
Paul Doru Barsanescu ◽  
Bogdan Leitoiu ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Pure Shear ◽  
Turbine Blades ◽  
Complex Loading ◽  
Wind Turbine Blades ◽  
Reinforced Plastics ◽  
Glass Fiber Reinforced ◽  
Gfrp Composite ◽  
Woven Reinforcement ◽  
Materials Used

The paper proposes to present the results of the evaluation of glass fiber reinforced plastics (GFRP) used in the construction of wind turbine blades. In a wind turbine, the blades are the most exposed to damages and the defects which appear are various and are connected with the type of manufacture, simple/complex loading, environmental conditions etc. In order to increase the lifetime span and to analyze the degradation phenomena during the materials functioning, destructive evaluation tests are performed to determine the mechanical property, by testing pure shear on specimens Iosipescu, from GFRP with woven reinforcement at [± 45°] and [0°/90°], with the shear fixture, endowment of Technical University Gh.Asachi Iasi.

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