SHM reliability and implementation – A personal military aviation perspective

Lindgren, Eric A.

doi:10.1063/1.4940645

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…This leads to even larger uncertainty in the POD of SHM. Lindgren [47] discussed that, for military aviation, because of the validation constraints, Technology Readiness Level (TRL) remains at 4 or less (out of 10) and this becomes a significant barrier for implementing SHM on USAF aircraft.…”

Section: Certification Challenges To Implementing Shm On Aircraftmentioning

confidence: 99%

Cost-Effectiveness of Structural Health Monitoring in Fuselage Maintenance of the Civil Aviation Industry †

Dong

Kim

2018

Aerospace

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Abstract:Although structural health monitoring (SHM) technologies using sensors have dramatically been developed recently, their capability should be evaluated from the perspective of the maintenance industry. As a first step toward utilizing sensors, the objective of the paper is to investigate the possibility of using sensors for inspecting the entire fuselage during C-check. First, we reviewed various sensors for their detection range, detectable damage size, and installed weight, which revealed that the piezoelectric wafer active sensor (PWAS) is the most promising sensor for aircraft SHM. Second, we performed a case study of inspecting the fuselage of Boeing-737NG using PWAS. To maintain the same detecting capability of manual inspection in C-check, we estimated the total number of sensors required. It turned out that utilizing sensors can reduce the maintenance downtime and thus, maintenance cost. However, even with a very conservative estimate, the lifetime cost was significantly increased due to the weight of sensor systems. The cost due to the weight increase was an order of magnitude higher than the cost saved by using SHM. We found that a large number of sensors were required to detect damage at unknown locations, which was the main cause of the weight increase. We concluded that to make SHM cost-effective, it would be necessary either to improve the current sensor technologies so that a less number of sensors are used or to modify the aircraft design concept for SHM.

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Section: Certification Challenges To Implementing Shm On Aircraftmentioning

confidence: 99%

Cost-Effectiveness of Structural Health Monitoring in Fuselage Maintenance of the Civil Aviation Industry †

Dong

Kim

2018

Aerospace

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“…A primary challenge stems from the integration of AE systems into composite structures. This has a long history (e.g., KC-135 military aircraft in the 1980ies [231]) and is still challenging today. Long-term SHM of FRP composite structures either with AE or guided waves may benefit from the integration of the complete monitoring system into the structure.…”

Section: Condition Monitoring (Cm) and Structural Health Monitoring (...mentioning

confidence: 99%

AE in Polymeric Composites

Sause

Brunner

2021

Springer Tracts in Civil Engineering

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Polymeric composites comprise a wide range of materials consisting of continuous or discontinuous fibers, various particles, or combinations of these embedded in a polymer matrix. Beside technical polymer composites, biobased composites with biopolymers or natural fibers, or natural polymer composites such as wood are finding increasing use in structural applications. The complex, multi-scale morphology yields distinctly different mechanisms generating AE under thermo-mechanical loads or environmental exposure. Storage tanks and pressure vessels made from fiber-reinforced composites were among the first components for which AE testing yielded reliable assessments of structural integrity. The empirical Felicity-ratio is important for quantitative predictions of structural damage and remaining service life. Recent advances in AE signal analysis now contribute to improved source location accuracy and to the unambiguous identification of the underlying microscopic signal source mechanisms. AE testing of infrastructure and components tends to move from periodic inspection to continuous structural health or condition monitoring. This also applies to infrastructure made from polymeric composites as well as to structures or parts in the transportation industry. AE implemented for process monitoring related to polymeric composites shows potential for development of AEbased process control. This chapter first reviews the mechanisms generating AE in polymeric composites, then discusses progress in AE signal analysis for source location and identification of mechanisms and presents selected examples of established AE applications from the micro-to the macro-scale. This includes prediction and quantification of damage in materials and structures, and closes with prospects for developments of AE condition monitoring and process control.

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Ultrasonic wavefield imaging in structural health monitoring: A review

He,

Yuan

2024

Structural Health Monitoring/Management (SHM) in Aerospace Structures

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SHM reliability and implementation – A personal military aviation perspective

Cited by 3 publications

References 8 publications

Cost-Effectiveness of Structural Health Monitoring in Fuselage Maintenance of the Civil Aviation Industry †

Cost-Effectiveness of Structural Health Monitoring in Fuselage Maintenance of the Civil Aviation Industry †

AE in Polymeric Composites

Ultrasonic wavefield imaging in structural health monitoring: A review

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