Lamb Wave-Based Structural Health Monitoring on Composite Bolted Joints under Tensile Load

Yang, Bin; Xuan, Fu‐Zhen; Xiang, Yanxun; Li, Dan; Zhu, Wujun; Tang, Xiaojun; Xu, Jianghao; Yang, Kang; Luo, Chang

doi:10.3390/ma10060652

Cited by 40 publications

(22 citation statements)

References 39 publications

(53 reference statements)

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“…We used the Abaqus/Explicit platform (Version: Abaqus 6.12) to perform the simulation works. The elastic and strength properties of WGF/epoxy composites used in the FE simulation are in according to Table and . Surfaces between different composite layers are tied together in the model.…”

Section: Fe Simulation and Theoretical Analysismentioning

confidence: 99%

“…The dimensions of the laminates are 400 × 400 × 2 mm and 300 × 300 × 2 mm, respectively. In the two non‐isotropic materials, the wave velocity is subject to the direction of propagation . Su et al introduced the “slowness profiles” to visually highlight the discrepancy in the propagation of Lamb waves in different directions .…”

Section: Fe Simulation and Theoretical Analysismentioning

confidence: 99%

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Damage Localization in Composite Laminates by Building in PZT Wafer Transducers: A Comparative Study with Surface‐Bonded PZT Strategy

et al. 2018

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Lamb waves provide sensitive and effective approach for nondestructive inspection of large-scale composite structures. Traditionally in Lamb wavebased damage detection systems, the piezoelectric (PZT) wafer transducers are attached on the surface of composite components. However, surfacebonded PZT wafers are fragile, and they may lose serviceability when external load happens. In this paper, numerical and theoretical investigations are firstly carried out to analyze the Lamb wave features generated by PZT wafers that are located in the mid-thickness of a thin-walled plate. Subsequently, the authors integrate the PZT wafer arrays in woven glass fiber reinforced epoxy (WGF/epoxy) laminates with stacking sequence of [90 /0 ] 4 . It is found that the approximate single S0 Lamb wave mode is generated by the built-in PZT wafers. This makes the received signals very simple and easy to be interpreted. Utilizing the signals obtained by the built-in and surface-bonded PZT wafer transmitter-receiver arrays, damage localization algorithms that considered the slowness profiles are compiled to help locating the defects. The compared results demonstrate that the built-in PZT strategy has great potential for quantitative non-destructive evaluation of composite structures.

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Section: Fe Simulation and Theoretical Analysismentioning

confidence: 99%

Section: Fe Simulation and Theoretical Analysismentioning

confidence: 99%

Damage Localization in Composite Laminates by Building in PZT Wafer Transducers: A Comparative Study with Surface‐Bonded PZT Strategy

et al. 2018

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“…This is known as saturation phenomenon. Similarly, Amerini and Meo and Yang et al used transmitted guided wave energy to detect the bolt preload of different bolt joints, and saturation phenomena were also observed. Therefore, it is difficult to monitor bolt loosening at its early stage with WED method.…”

Section: Introductionmentioning

confidence: 99%

A bolt preload monitoring method based on the refocusing capability of virtual time reversal

Zhang

2019

Struct Control Health Monit

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Bolted joints are widely used in aerospace and civil structures. Nevertheless, bolts may easily lose preload because of inappropriate initial preloads or time-varying servicing loads. Hence, bolt loosening monitoring is important for ensuring the safety and reliability of the bolt-jointed structures. In this paper, a guided wave method based on virtual time reversal (VTR) and tightness index representing refocusing capability is developed for bolt preload monitoring and to mitigate the requirement of baseline. In VTR, a response signal acquired from the bolted structure in fully tightened condition is reversed and used as the excitation signal for the bolted structure in loosening states. On this basis, the ratio of the energy of the refocused wave packet in final received wave signal to the energy of the entire signal is defined as tightness index (TI E ). In this way, the calculation of TI E does not need to compare with baseline acquired in fully tightened condition. The effects of roughness of contact surfaces on guided wave propagation and the refocusing capability are analyzed by a 2D FE model. The proposed method is also experimentally validated by bolt-jointed structures with single and multiple bolts. The experimental results show that TI E increased almost linearly with the decease of bolt preload and is effective at the early stage of bolt loosening. In addition, the effect of temperature on preload detection accuracy is weak. Furthermore, it is important to select a right frequency to ensure that the TI E is sensitive throughout the entire bolt torque range.

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“…A transmission coefficient was defined for crack characterization. Recently, Yang et al [28] presented a study on monitoring composite bolted joints under tensile load. They investigated relations between Lamb wave signals, tightening force, tensile load, and failure modes.…”

Section: Introductionmentioning

confidence: 99%

Monitoring Steel Bolted Joints during a Monotonic Tensile Test Using Linear and Nonlinear Lamb Wave Methods: A Feasibility Study

Rucka

2018

Metals

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The structural integrity of steel bolted joints may be compromised due to excessive loading. Therefore, condition assessment and the detection of potential defects before they cause a failure have become a major issue. The paper is focused on the condition monitoring of a bolted lap joint subjected to progressive degradation in a tensile test. The inspection used Lamb waves propagated through the overlap area. Wave propagation signals were registered automatically by means of piezoelectric transducers. Two damage indices were defined based on linear and nonlinear features of Lamb waves. The use of a network of piezoelectric transducers and the analysis of multiple signals instead of single ones was proved to effectively monitor the state of the bolted joint. The obtained results showed that the method enabled to detect selected stages of the degradation process and to characterize the reduction of the contact area between the plates in the overlap area.

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Lamb Wave-Based Structural Health Monitoring on Composite Bolted Joints under Tensile Load

Cited by 40 publications

References 39 publications

Damage Localization in Composite Laminates by Building in PZT Wafer Transducers: A Comparative Study with Surface‐Bonded PZT Strategy

Damage Localization in Composite Laminates by Building in PZT Wafer Transducers: A Comparative Study with Surface‐Bonded PZT Strategy

A bolt preload monitoring method based on the refocusing capability of virtual time reversal

Monitoring Steel Bolted Joints during a Monotonic Tensile Test Using Linear and Nonlinear Lamb Wave Methods: A Feasibility Study

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