Soft impacts on aerospace structures

Abrate, Serge

doi:10.1016/j.paerosci.2015.11.005

Cited by 62 publications

(22 citation statements)

References 122 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Aircraft engines are the critical front-facing components, and the fan blades may be subjected to bird strike with high probability (Abrate, 2016). Capability of ingesting birds weighing up to 1.8 kg without sustaining damage is required so that no fatal threat will pose to the people in aircraft.…”

Section: Introductionmentioning

confidence: 99%

Impact responses of slender composite plates for bird-strike testing of fan blades

Zhou

Sun

Huang

2019

Lat. Am. j. solids struct.

View full text Add to dashboard Cite

Bird-strike failure of fan blades is one of the basic challenges for the safety of aircraft engines. Simplified slender blade-like plates are always used to evaluate the impact-induced damage mechanism at design stage. One undesirable issue is the failure at the root of clamped slender plates, which cannot recover the real case of twisted blades. For this purpose, three different strategies were exploited to obtain desirable deformation and stress responses, namely the impact location, additional weight, and the boundary condition. Numerical models of the simplified slender blade and the bird projectile were constructed by using finite element method (FEM) and smoothed particle hydrodynamics (SPH) approaches. The impact deformations and stress distributions were comparatively investigated in detail. The numerical results show that changing the boundary condition is the most effective way to obtain preferable impact responses for further failure analysis of real fan blades. Present results will be useful to future experimental design of simplified bird-strike testing.

show abstract

Section: Introductionmentioning

confidence: 99%

Impact responses of slender composite plates for bird-strike testing of fan blades

Zhou

Sun

Huang

2019

Lat. Am. j. solids struct.

View full text Add to dashboard Cite

show abstract

“…Liquid impacts on solids involve physical problems of high engineering interest, as they are linked with erosion development [1] and eventual damage of mechanical structures and machines; therefore, they are of interest to a wide range of hydraulic machinery utilised in many industrial applications. Cavita- 5 tion formation and induced erosion can be also realised during the impact of liquid droplets on steam-turbine blades [2], and rain droplets impacting on airplanes [3] and wind-turbine blades [4]. Moreover, shock-wave interaction with material interfaces has been extensively demonstrated in e.g.…”

Section: Introductionmentioning

confidence: 99%

Cavitation induction by projectile impacting on a water jet

Stavropoulos-Vasilakis

Kyriazis

Koukouvinis

et al. 2019

International Journal of Multiphase Flow

View full text Add to dashboard Cite

This is the accepted version of the paper.This version of the publication may differ from the final published version.Permanent repository link: https://openaccess.city.ac.uk/id/eprint/21817/ Link to published version: http://dx. AbstractThe present paper focuses on the simulation of the high-velocity impact of a projectile impacting on a water-jet, causing the onset, development and collapse of cavitation. The simulation of the fluid motion is carried out using an explicit, compressible, density-based solver developed by the authors using the OpenFOAM library. It employs a barotropic two-phase flow model that simulates the phase-change due to cavitation and considers the co-existence of noncondensable and immiscible air. The projectile is considered to be rigid while its motion through the computational domain is modelled through a direct-forcing Immersed Boundary Method. Model validation is performed against the experiments of Field et al. [1], who visualised cavity formation and shock propagation in liquid impacts at high velocities. Simulations unveil the shock structures and capture the high-speed jetting forming at the impact location, in addition to the subsequent cavitation induction and vapour formation due to refraction waves. Moreover, model predictions provide quantitative information and a better insight on the flow physics that has not been identified from the reported experimental data, such as shock-wave propagation, vapour formation quantity and induced pressures. Furthermore, evidence of the Richtmyer-Meshkov instability developing on the liquid-air interface are predicted when sufficient dense grid resolution is utilised. 45 cavitation erosion development.Along the same lines, the theoretical study of [31], has analytically examined the liquid drop impacts on solid surfaces, while the experiments reported in [1] for liquid droplets impacting on a solid surface, reveal the strong effects of com-the nozzle, in: 10th International Cavitation Symposium, 2018.

show abstract

“…New aircraft parts are usually certified by calculations and empirically [5][6][7]. Physical testing is an expensive process as several tests may be required to evaluate windshield effectiveness.…”

Section: Introductionmentioning

confidence: 99%

“…In doing so, the focus was on the accuracy of describing the process of damage by a bird. Lagrangian, Arbitrary Lagrangian Eulerian (ALE) and Smooth Particle Hydrodynamics (SPH) formulations have found wide application [1,3,[6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Simulating of Bird Strike on Aircraft Laminated Glazing

2019

View full text Add to dashboard Cite

A bird strike is a critical problem in the context of safety in the aviation industry. All modern aircraft structures are designed with account of likely collision with birds. Thus, aviation standards in force require that the aircraft construction would allow the crew to conclude the flight safely after collision with a 1.81-kg bird. A method for analysing the stress-strained state of laminated airplane glazing at different operational factors is presented. The method includes a technique for strength analysis of the laminated airplane glazing at bird impact, and a technique for analysis of excess pressure. The model of laminated glazing is based on the refined first-order theory accounting for transverse shear strains, thickness reduction and normal element rotation inertia in each layer. The mathematical model of the pressure impulse authentically reproducing the bird impact is based on experimental research. Theoretical results are in good agreement with experimental data, thus allowing to recommend the method to develop new airplane glazing elements.

show abstract

Soft impacts on aerospace structures

Cited by 62 publications

References 122 publications

Impact responses of slender composite plates for bird-strike testing of fan blades

Impact responses of slender composite plates for bird-strike testing of fan blades

Cavitation induction by projectile impacting on a water jet

Simulating of Bird Strike on Aircraft Laminated Glazing

Contact Info

Product

Resources

About