Safety and Airworthiness Verification of Civil Aircraft Engines

Yang, Bin

doi:10.18005/jmet0103003

Cited by 3 publications

(4 citation statements)

References 34 publications

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“…From the point of view of the damage analysis of a composite material, the Hashin's damage material model was used. The expressions for the Hashin tensile fibre failure criteria [15], after some bidimensional simplifications ( 3 = 13 = 0), are shown below in equations (1) and (2). Damage initiation occurs when either of these indices exceeds 1.…”

Section: Numerical Simulationmentioning

confidence: 99%

“…International certification regulations require that all forward-facing aircraft components should be proven to withstand bird strikes to a certain level before they can be employed in an aircraft [2]. A bird impact test provides a direct method for determining bird strike resistance; however, the design of aircraft structures typically involves many iterations from design to manufacturing to testing and back, requiring that many bird impact tests to be conducted.…”

Section: Introductionmentioning

confidence: 99%

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Verification and numerical simulation of advanced composite inlet in compliance of airworthiness impact requirements

Doubrava¹,

Oberthor²,

Raška³

et al. 2019

13th Research and Education in Aircraft Design: Conference Proceedings

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Bird or hail stone strikes are an important phenomenon which must be considered during aircraft design. Most of major bird or hail strike incidents result from engine ingestion. As engines are the sole thrust providing mechanisms of an aircraft, it is critical to investigate and mitigate the effects of bird or hail strikes on engine inlets and systems to the greatest extent possible. The article presents application of test verified numerical simulation for design and full-scale test verification of advanced composite air inlet for new generation of jet trainer aircraft from point of view of high speed impact resistance. The physical bird and hail impact tests were performed at the Czech Aerospace Research Centre (VZLÚ) according to airworthiness requirements. The measurement during impact test were performed by high-speed camera, Fiber Bragg Grating (FGB) sensors and strain gauges in cooperation with Czech Technical University (CTU) in Prague. The results from full-scale bird and hail strike tests were compared with numerical simulation.

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Section: Numerical Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Verification and numerical simulation of advanced composite inlet in compliance of airworthiness impact requirements

Doubrava¹,

Oberthor²,

Raška³

et al. 2019

13th Research and Education in Aircraft Design: Conference Proceedings

View full text Add to dashboard Cite

show abstract

“…An increasing number of aircraft manufacturers, aviation companies and government authorities have been conducting advanced research and development programmes to reduce the annual cost, number of injuries and fatalities which result from the collisions of aircrafts with wildlife (Yang, 2013). To eliminate the harmful effects of bird or hailstone strikes, the following two main approaches are typically implemented:…”

Section: Introductionmentioning

confidence: 99%

“…In this study, the second approach will be further developed. International certification regulations require that all forward-facing aircraft components be proved to withstand bird or hailstone strikes to a certain level before they can be used in an aircraft (Yang, 2013).…”

Section: Introductionmentioning

confidence: 99%

High-speed impact assessment for composite air inlet

Doubrava

Oberthor

Bělský

et al. 2019

IJSI

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Purpose The purpose of this paper is to describe the approach for the design of a jet engine composite air inlet for a new generation of jet trainer aircraft from the perspective of airworthiness requirements regarding high-speed impact resistance. Design/methodology/approach Validated numerical simulation was applied to flat test panels. The final design was optimised and verified by validated numerical simulation and verified by testing on a full-scale demonstrator. High-speed camera measurement and non-destructive testing (NDT) results were used for the verification of the numerical models. Findings The test results of flat test panels confirmed the high durability of the composite structure during inclined high-speed impact with a near-real jet inlet load boundary condition. Research limitations/implications Owing to the sensitivity of the composite material on technology production, the results are limited by the material used and the production technology. Practical implications The application of flat test panels for the verification and tuning of numerical models allows optimised final design of the air inlet and reduces the risk of structural non-compliance during verification tests. Originality/value Numerical models were verified for simulation of the real composite structure based on high-speed camera results and NDT inspection after impact. The proposed numerical model was simplified for application in a real complex design and reduced calculation time.

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Bird and hail stone impact resistance analysis on a jet engine composite air inlet

et al. 2018

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Abstract. Bird or hail stone impacts are an important phenomenon that must be taken into consideration when designing aircraft. As engines are the sole thrust-providing mechanisms of an aircraft, it is critical that the effects of bird or hail stone strikes on engine inlets and systems be investigated and mitigated to the greatest extent possible. A combination of experiments and numerical simulations is necessary to properly understand the behaviour of a bird or hail stone during impact and the reaction of the impacted material with the structure. A simulation methodology is developed and validated to certify the bird or hail stone strike resistance of composite air ducts designed for a new generation of jet training aircraft. Physical impact tests were performed on real composite parts. Numerical simulation results were compared with test results. Numerical simulation was also used for test preparation and optimization of the test rig design from the point of view of the influence of the stiffness of the surrounding aircraft structure. The validated modelling procedure allows the analysis of numerous impact scenarios, improving the optimization procedures for aircraft component design and reducing the cost of development by reducing the need to manufacture test prototypes.

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Safety and Airworthiness Verification of Civil Aircraft Engines

Cited by 3 publications

References 34 publications

Verification and numerical simulation of advanced composite inlet in compliance of airworthiness impact requirements

Verification and numerical simulation of advanced composite inlet in compliance of airworthiness impact requirements

High-speed impact assessment for composite air inlet

Bird and hail stone impact resistance analysis on a jet engine composite air inlet

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