Fatigue crack detection in rotating steel shafts using noncontact ultrasonic modulation measurements

Jeon, Ikgeun; Lim, Hyung Jin; Li, Peipei; Park, Byeongjin; Heinze, A.; Sohn, Hoon

doi:10.1016/j.engstruct.2019.109293

Cited by 22 publications

(6 citation statements)

References 34 publications

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“…Even though, common rotor fault conditions such as unbalance, misalignment, rubbing, and the so-called transversal cracks continue to affect the performance of these rotating machines, Boyko et al (2010). Thus, considerable academic efforts were dedicated to understand the dynamic behavior of faulty rotating shafts and to develop fault detection techniques, Greco et al (1978), Kottke and Menning (1981), Klompas (1983), Dimarogonas (1996), Ostachowicz and Krawczuk (2001), Carden and Fanning (2004), Jeon et al (2019), and Cavalini Jr et al (2020).…”

Section: Introductionmentioning

confidence: 99%

Active crack control approach applied to a horizontal rotating machine

Leão

Pereira

Carvalho

et al. 2022

Journal of Vibration and Control

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The present contribution proposes an active vibration control technique devoted to shafts with cracks aiming to minimize their propagation. The existence of a crack in rotating shafts can be characterized by 2 X and 3 X super-harmonic amplitudes in the vibration responses of the rotor, which can increase as the crack propagates along the shaft’s cross-section. A proportional-integral-derivative control technique is applied to suppress the 2 X and 3 X vibration amplitudes of a cracked shaft, which is performed by using a bandpass filter applied to the vibration responses of the rotor. Numerical and experimental results are obtained through both a representative finite element model of a horizontal rotor and its corresponding test-rig. In this case, electromagnetic actuators are used to apply the control effort to the rotor. The Mayes model is applied for simulating the breathing behavior of the transverse crack. The linear fracture mechanics theory is considered to correlate the crack depth with the corresponding additional rotor flexibility. Both numerical and experimental results demonstrate the possibility of reducing the effects of a transverse crack through active control on the dynamic behavior of a rotating machine. Moreover, it is shown that the proposed control law is capable of controlling the crack effects with the rotor operating in different rotation speeds.

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Section: Introductionmentioning

confidence: 99%

Active crack control approach applied to a horizontal rotating machine

Leão

Pereira

Carvalho

et al. 2022

Journal of Vibration and Control

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“…The environment of underwater concrete structures is harsh. The cracks in underwater concrete structures are more concealed compared with concrete structures on land, which makes it difficult to implement these mature technologies such as ultrasonic detection technology [5,6], raster scanning technology [7], ground penetrating radar [8] etc. Crack meter, slide micrometer and other widely used monitoring instruments belong to point-type monitoring technology with narrow coverage and easy to miss judgment, and the measurement signals of such instruments are generally electrical signals with poor anti-electromagnetic interference ability [9,10].…”

Section: Introductionmentioning

confidence: 99%

Crack width identification for underwater concrete structures using temperature tracer method

Zhang

Chen

Luo

et al. 2021

Meas. Sci. Technol.

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Based on the particularity of underwater concrete structure, a temperature tracer method based on heat transfer theory for crack detection was proposed. The basic way to identify cracks is to change the thermodynamic boundary conditions around cracks after cracking, which will lead to the change of cooling rate of the heat source near cracks. Based on this idea, a set of crack monitoring system composed of a temperature sensing system, a heating system, a monitoring tube and multiple casing tubes was designed. By using this system, a series of crack monitoring tests were carried out on two kinds of concrete specimens. The results show that the monitoring scheme with casing tube can detect the crack position in still water, and this monitoring scheme can detect both crack position and width in flowing water. The sensitivity of it is higher than that of the monitoring scheme without casing tube.

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“…Given the limitations of linear guided waves and the need to recognise damage in its earliest stage, the nonlinear guidedwave-based method offers an alternative for detecting and monitoring the initiation and growth of micro-damage. Much research has been undertaken to detect impairments based on nonlinear wave components in various materials and structures experimentally such as aluminium plate [10] and pipe [11], steel plate [12] and shafts [13], composites [14], metamaterial [15], FRP-reinforced steel [16] and bolt joints [17]. However, current research using nonlinear guided waves is mainly focused on qualitative study of damage, whereas quantitative damage assessment is less reported [18][19][20] yet but conversely important for SHM with the aim of monitoring damage severity.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear guided waves for fatigue crack evaluation in steel joints with digital image correlation validation

Lee

Guan

2020

Smart Mater. Struct.

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This paper presents a study of nonlinear guided-wave-based fatigue crack identification in a steel joint subjected to tensile fatigue loadings. The steel joint is considered as a section of a railway bogie, a vital component of the train structure. Finite element method and experiment were used to evaluate fatigue crack based on the second harmonic method. The symmetric mode (S1) of Lamb waves was selected as the input signal and excited in experiment by piezoelectric transducers installed on the upper surface of the joint. The sensing paths were aligned perpendicularly to and at various distances from the potential crack trajectory. When the waves interacted with the crack, higher order harmonics were produced owing to the phenomenon of contact acoustic nonlinearity. A nonlinear index based on the second harmonic characteristics was exploited to define the nonlinearity. To validate the outcomes based on nonlinear guided waves, a digital image correlation technique was implemented and the results were in good agreement. The findings indicated that the nonlinear guided-wave-based technique is capable of identifying crack initiation and growth in such joint type structures.

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Fatigue crack detection in rotating steel shafts using noncontact ultrasonic modulation measurements

Cited by 22 publications

References 34 publications

Active crack control approach applied to a horizontal rotating machine

Active crack control approach applied to a horizontal rotating machine

Crack width identification for underwater concrete structures using temperature tracer method

Nonlinear guided waves for fatigue crack evaluation in steel joints with digital image correlation validation

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