Acousto-elastic measurements and baseline-free assessment of bolted joints using guided waves in space structures

Zagrai, Andrei; Gigineishvili, Vlasi; Kruse, Walter A.; Murray, Andrew; Doyle, Derek; Reynolds, Whitney; Arritt, Brandon; Gardenier, Hugh

doi:10.1117/12.847883

Cited by 12 publications

(9 citation statements)

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“…Thereby, using only two or three possible paths, it is possible to obtain a realistic estimate of the location of damage in the form of single bolt loosening [47]. On this basis, Zagrai et al [48] tried to develop a baseline-free method utilizing [46]. In addition, because received guided waves are very complex, it is difficult to select the correct time window and the corresponding wave speed to calculate phase shift and the distance between wave path and damage.…”

Section: Phase Shiftmentioning

confidence: 99%

Structural Health Monitoring of Bolted Joints Using Guided Waves: A Review

Du¹,

Xu²,

Ren³

et al. 2018

Structural Health Monitoring From Sensing to Processing

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Bolted joints are widely applied in engineering structures. Significant advantages of bolted joints are that they can be easily disassembled and the possibility to design for bearing large working load. However, in practical applications, preload loss in pre-tensioned bolts is inevitable. Reliable detection of bolt loosening is significant to ensure structural reliability and safety. In the past decades, the guided wave-based structural health monitoring (SHM) methods have been developed for the detection of bolt loosening, and considerable advancements have been made in this area. This chapter presents a review of the existing studies on bolt preload monitoring method based on guided wave. The basic principle and characteristics of the typical methods are discussed, which involve wave energy dissipation, time reversal guided wave, contact acoustic nonlinearity, and active chaotic ultrasonic excitation-based methods. In addition, this chapter presents an experimental comparison of the detection sensitivity of wave energy dissipation and time reversal method. The results show that the TR method is more sensitive to bolt loosening.

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Section: Phase Shiftmentioning

confidence: 99%

Structural Health Monitoring of Bolted Joints Using Guided Waves: A Review

Du¹,

Xu²,

Ren³

et al. 2018

Structural Health Monitoring From Sensing to Processing

View full text Add to dashboard Cite

show abstract

“…Prior research has proven feasibility of embedded piezoelectric wafer active sensors (PWAS) to detect, localize, and quantify preload loss at bolted interfaces. [3][4][5][6][7][8][9][10][11][12] These same methods have recently been used to examine thermal characteristics of interfaces. Doyle, Reynolds, and Hengeveld utilized ultrasonic characterization as a means of investigating thermal contact resistance across a lap joint over a range of torque values.…”

Section: Introductionmentioning

confidence: 95%

Ultrasonic Characterization as a Correlating Metric for Evaluating Thermal Contact Resistance

Hengeveld¹,

Doyle²,

Reynolds³

et al. 2012

53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials ConferenceSelf Cite

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Thermal contact resistance inhibits heat removal from electronic components, and can result in overheating, performance degradation, and failure. However, determining and/or verifying contact resistance can be challenging since it is dependent upon surface roughness and waviness; mechanical and thermal properties of mating solids; applied pressures; and properties of interstitial materials. Recent investigations have shown the potential of ultrasonic characterization as a correlating metric for evaluating interface contact resistance. The advantage is the responsive, on-demand nature of this approach compared to traditional, time-intensive thermal testing. The work presented here explores the utility of ultrasonic characterization as a correlating metric for evaluating thermal contact resistance in a vacuum environment. Results show that ultrasonic measurements have significant potential contribution for evaluating thermal interfaces for space systems since they are limited to 'conductive' energy transfer regardless of the presence of atmosphere. Developing a correlation algorithm to relate ultrasonic transmissions to thermal transmission will allow technicians to evaluate systems in real-time and on-demand. This level of responsiveness can result in significant improvements to cost, schedule, performance, and risk. Nomenclature h = convective heat transfer coefficient, W/m 2 -K k = thermal conductivity, W/m-K , cond x q = conductive heat flux, W/m 2 conv q = convective heat flux, W/m 2 rad q = radiative heat flux, W/m 2 T = temperature, K Greek Symbols  = emissivity, dimensionless  = Stefen-Boltzmann constant, 5.67x10 -8 W/m 2 -K 4 Superscripts/Subscripts s = surface, dimensionless

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“…These factors include the location of the sensor, the polyethylene (PE) jacket of the cable, the span of the cable, the sag of the cable, the slant of the cable, the boundary conditions of the cable, and the correctness of the calculation model [18]. The acoustoelastic effect method obtains cable tension by measuring the propagation velocity of the ultrasonic wave within the cable [19,20,21]. Due to the complexity of the cables, establishing suitable dispersion equations is hard.…”

Section: Introductionmentioning
confidence: 99%

Cable Tension Monitoring Based on the Elasto-Magnetic Effect and the Self-Induction Phenomenon
Zhang
¹
,
Zhou
²
,
Zhou
³

et al. 2019
Materials
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Cable tension monitoring is important to control the structural performance variation of cable-supported structures. Based on the elasto-magnetic effect and the self-induction phenomenon, a new non-destructive evaluation method was proposed for cable tension monitoring. The method was called the elasto-magnetic induction (EMI) method. By analyzing the working mechanism of the EMI method, a set of cable tension monitoring systems was presented. The primary coil and the induction unit of the traditional elasto-magnetic (EM) sensor were simplified into a self-induction coil. A numerical analysis was conducted to prove the validity of the EMI method. Experimental verification of the steel cable specimens was conducted to validate the feasibility of the EMI method. To process the tension monitoring, data processing and tension calculation methods were proposed. The results of the experimental verification indicated that different cables of the same batch can be calibrated by one proper equation. The results of the numerical analysis and the experimental verification demonstrated that the cable tension can be monitored both at the tension-applying stage and the tension-loss stage. The proposed EMI method and the given monitoring system are feasible to monitor the cable tension with high sensitivity, fast response, and easy installation.

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Acousto-elastic measurements and baseline-free assessment of bolted joints using guided waves in space structures

Cited by 12 publications

References 0 publications

Structural Health Monitoring of Bolted Joints Using Guided Waves: A Review

Structural Health Monitoring of Bolted Joints Using Guided Waves: A Review

Ultrasonic Characterization as a Correlating Metric for Evaluating Thermal Contact Resistance

Cable Tension Monitoring Based on the Elasto-Magnetic Effect and the Self-Induction Phenomenon

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