Fatigue fracture analysis of an ADF antenna in a military aircraft

Rebhi, Lamine; Krstic, Branimir; Boutemedjet, Abdelwahid; Totovski, Ljubica; Vučetić, Nikola; Milutinović, Miroslav; Rezgui, Narimane

doi:10.1016/j.engfailanal.2018.04.013

Cited by 9 publications

(5 citation statements)

References 15 publications

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“…Figure 3.3 shows the schematic for the wing root assembly failure for a Martin 202 aircraft. More recently, Rebhi et al examined the reason for the fracturing of the ADF antenna placed just behind the cockpit of a military aircraft (Rebhi et al 2018). Figure 3.4a shows the ADF antenna location on the aircraft while Fig.…”

Section: Fatiguementioning

confidence: 99%

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Defect Types

Faisal

Cora

Bekci

et al. 2021

Structural Health Monitoring Damage Detection Systems for Aerospace

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This chapter provides an overview of the common types of defects found in various structural materials and joints in aircraft. Materials manufacturing methods (including large-scale production) have been established in the aircraft industry. However, as will be seen in this chapter, manufacturing defects and defects during in-service conditions are very common across all material types. The structural material types include metals, composites, coatings, adhesively bonded and stir-welded joints. This chapter describes the defect types as a baseline for the description of their detection with the methods of Chap. 10.1007/978-3-030-72192-3_5 to 10.1007/978-3-030-72192-3_8. Based on the understanding of the defect types, there is great expectation for a technical breakthrough for the application of structural health monitoring (SHM) damage detection systems, where continuous monitoring and assessment with high throughput and yield will produce the desired structural integrity.

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Section: Fatiguementioning

confidence: 99%

“…It is one of the serious concerns especially for older aircraft and responsible for 25% of the metallic component failures. (Rebhi et al 2018) Corrosion-related expenses are estimated as big as 2.2 billion USD (Mouritz 2012a). It is commonly agreed that if corrosion issues are eliminated, maintenance of aircraft can be simplified.…”

Section: Corrosionmentioning

confidence: 99%

Defect Types

Faisal

Cora

Bekci

et al. 2021

Structural Health Monitoring Damage Detection Systems for Aerospace

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“…Nowadays, more and more high-data transmission applications are emerging in daily life, such as high-definition television, autopilot, and augmented reality/virtual reality. − Therefore, typical millimeter-wave bands for short-range wireless communication have been put forward, such as the 45 GHz band (IEEE 802.11aj) and 60 GHz band (IEEE 802.11ad), , which are worldwide license-free, providing the foundation for high-speed wireless communication. , Millimeter-wave wireless communication usually requires the antennas to be miniaturized and of wide bandwidth and high gain. − In addition, with the environment in which antennas operate becoming more and more complex, the explosive growth of antennas and other electronics also puts forward higher requirements for conductive materials. In the past, traditional metal materials such as copper, aluminum, and gold were extensively used for the manufacture of electronic devices, which led to environmental issues due to the pollution from the electronic waste. , In the meantime, the existing millimeter-wave antennas are mostly copper-based, making it difficult to obtain them with corrosion resistance, lightweight, and environmental friendliness to face the increasingly complex and versatile application scenarios. − Therefore, it is urgent to explore new-generation materials for application in millimeter-wave short-range wireless communication (MSWC), which can ensure the good working performance of electronic devices while possessing excellent mechanical stability, chemical stability, and environmental benignancy.…”

Section: Introductionmentioning

confidence: 99%

Millimeter-Wave and Short-Range Wireless Communication Antenna Based on High-Conductivity Graphene-Assembled Film

Xin,

Song,

Jiang

et al. 2023

ACS Appl. Mater. Interfaces

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Millimeter-wave and short-range wireless communication is an important part of the Internet of Things due to its advantages of high transmission speed and large data capacity. In this paper, two antenna arrays operating at typical millimeter-wave bands (45 and 60 GHz) based on graphene-assembled films (GAF) are proposed for short-range wireless communication application. The 45 GHz graphene-assembled film antenna array is in the form of a magnetoelectric dipole antenna with a strip slot coupling to achieve bidirectional radiation, which offers an operating bandwidth of 40–49.5 GHz with a realized gain of 11.8 dBi. The 60 GHz graphene-assembled film antenna utilizes a microstrip discontinuous radiation array to achieve radiation with an operating bandwidth of 59–64 GHz, reaching the peak realized gain of 14.92 dBi over the working frequency. Finally, we proposed an experimental validation to verify the transmission performance of both antenna arrays in an actual conference room. The results show that the signal drops slowly in the room with drop rates of 0.064 dB/cm (at 45 GHz) and 0.071 dB/cm (at 60 GHz), while it steeply dropped through the wall with the drop rates of 2.3 and 3.13 dB/cm, more than 35-fold difference in signal drop rates in the room and through the wall. It has been confirmed that the proposed antenna arrays can successfully realize fast indoor short-range wireless communication while also preventing signal leakage through walls, thereby enhancing the security of information. In summary, this is the first time that we have applied graphene-based materials to millimeter-wave and short-range wireless communications, revealing the significant potential of carbon-based materials in high-frequency communication systems.

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“…And because the fatigue cracks are small and often hidden in the parts that are not easy to check, the detection rate is low during each maintenance. However, once the crack expands to a certain extent, the structure would break suddenly, endangering flight safety [2,26].…”

Section: Introductionmentioning

confidence: 99%

A risk assessment method of aircraft structure damage maintenance interval Indexed by: considering fatigue crack growth and detection rate

Zhang¹,

Mao²,

Liu³

et al. 2023

Eksploatacja i Niezawodność – Maintenance and Reliability

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The accurate assessment of aircraft structure damage risk is the premise of establishing reasonable, economic and reliable maintenance intervals. While many studies have proposed damage risk assessment methods for aircraft structures, these methods lack the quantification of risk. This paper proposed a risk assessment method of aircraft structure damage maintenance interval considering fatigue crack growth rate and crack detection rate. The damage process of aircraft structure was simulated by Monte Carlo simulation to realize the quantitative assessment of aircraft structure damage risk and maintenance interval. Taking an aircraft fleet as an example, the damage risk of its wing structure was simulated and analyzed. The results show that if the risk is controlled within a reasonable range, the maintenance interval should be shortened to 16 flight hours. At the same time, through the analysis of the risk classification standard and the crack detection rate, the quantitative evaluation of the risk classification standard was realized.

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Fatigue fracture analysis of an ADF antenna in a military aircraft

Cited by 9 publications

References 15 publications

Defect Types

Defect Types

Millimeter-Wave and Short-Range Wireless Communication Antenna Based on High-Conductivity Graphene-Assembled Film

A risk assessment method of aircraft structure damage maintenance interval Indexed by: considering fatigue crack growth and detection rate

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