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Journal ArticleDOI

Foreign Object Damage to Fan Rotor Blades of Aeroengine Part II: Numerical Simulation of Bird Impact

01 Aug 2008-Chinese Journal of Aeronautics (Elsevier)-Vol. 21, Iss: 4, pp 328-334
TL;DR: In this paper, a three-blade computational model is set up for the fan rotor blade having shrouds, and the transient response curves of the points corresponding to measured points in experiments, displacements and equivalent stresses on the blades are obtained during the simulation.
About: This article is published in Chinese Journal of Aeronautics.The article was published on 2008-08-01 and is currently open access. It has received 30 citations till now. The article focuses on the topics: Rotor (electric).
Citations
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Journal ArticleDOI
Sebastian Heimbs1
TL;DR: An overview on the development, characteristics and applications of different soft body impactor modeling methods by an extensive literature survey is given, which highlights the advantages and disadvantages of the most established techniques.

191 citations

Journal ArticleDOI
TL;DR: In this paper, gradient cellular centresymmetric auxetic configurations are evaluated as potential cores for aeroengine fan blades, and optimized to reduce the dynamic response for the first three fundamental modes.
Abstract: In this study, gradient cellular centresymmetric auxetic configurations are evaluated as potential cores for aeroengine fan blades, and optimized to reduce the dynamic response for the first three fundamental modes. Auxetic (negative Poisson’s ratio) re-entrant cellular beams are modeled, manufactured, and tested to assess their natural frequencies and mode shapes. Gradient versions of these beams with a varying internal cell angle are then designed to be incorporated as fillers in a baseline fan blade model. The optimized configurations of the gradient core lead to a substantial decrease of the mass of the fan blade, reduction of the dynamic modal displacements, and a lowering of the first three natural frequencies within the admissible frequency bandwidth.

115 citations


Cites background from "Foreign Object Damage to Fan Rotor ..."

  • ...Fan blade skins can be metallic, or made with carbon fiber-reinforced composites (Dominy, 1994; Yupu et al., 2008)....

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Journal ArticleDOI
TL;DR: In this paper, the authors provide an overview of the literature dealing with three types of soft impacts of concern for the aerospace applications, namely impacts of rain drops, hailstones and birds against aircraft.

56 citations

Journal ArticleDOI
TL;DR: In this article, numerical and experimental techniques were used to investigate the effect of bird strike on different types of aircraft bubble windows with different geometries and materials, and the results from all techniques were found to be almost similar and in good agreement with the test data.
Abstract: This paper uses numerical and experimental techniques to investigate the effect of bird strike on different types of aircraft bubble windows with different geometries and materials. Three different methods, namely Lagrangian, Arbitrary Lagrangian Eulerian (ALE) and Smooth Particle Hydrodynamics (SPH) are used to simulate bird strike effects on different types of bubble windows during the impact phase. Simple tension tests are carried out on some samples to determine the behaviour of window material during impact while models reported in the literature are used for modelling the bird. First, a simple bubble window is studied numerically using the Lagrangian, ALE and SPH techniques and the results are compared with experimental data. The results from all techniques are found to be almost similar and in good agreement with the test data. This will give way to only ALE to be used for other case studies. Next, bird impacts on a two-layer bubble window with a Poly Vinyl Butyral (PVB) interlayer and a multi-wall...

36 citations

Book ChapterDOI
01 Jan 2013
TL;DR: In this paper, the authors investigated the hull-slamming problem by experiments and numerical simulations of the water entry of elastic wedges impacting on an initially calm surface with pure vertical velocity.
Abstract: This work investigates the slamming phenomenon experienced during the water entry of deformable bodies. Wedges are chosen as reference geometry due to their similarity to a generic hull section. Hull slamming occurs when a ship re-enters the water after having been partially or completely lifted out the water. There are three more cases commonly defined as slamming phenomena: bow-flare, wet-deck and green water slamming. These are all special cases of the general topic of water entry of a body. While the analysis of rigid structures entering the water has been extensively studied in the past and there are analytical solutions capable of correctly predicting the hydrodynamic pressure distribution and the overall impact dynamics, the effect of the structural deformation on the overall impact force is still a challenging problem to be solved. In fact, in case of water impact of deformable bodies, the dynamic deflection could interact with the fluid flow, affecting the hydrodynamic load. This work investigates the hull-slamming problem by experiments and numerical simulations of the water entry of elastic wedges impacting on an initially calm surface with pure vertical velocity. The objective is to determine an accurate model to predict the overall dynamics of the wedge and its deformations. More than 1,200 experiments were conducted by varying wedge structural stiffness, deadrise angle, impact velocity and mass. On interest are the overall impact dynamics and the local structural deformation of the panels composing the wedge. Alongside with the experimental analysis, numerical simulations based on a coupled Smoothed Particle Hydrodynamics (SPH) and FEM method are developed. Ranges of applicability of a simplified model neglecting the air are found. The results provide evidence of the mutual interaction between hydrodynamic load and structural deformation. It is found a simple criterion for the onset of fluid structure interaction (FSI), giving reliable information on the cases where FSI should been taken into account. The occurrence of ventilation and cavitation varying the impact parameters are also outlined.

29 citations

References
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Book
12 Sep 2000
TL;DR: In this paper, the authors present a list of boxes for Lagrangian and Eulerian Finite Elements in One Dimension (LDF) in one dimension, including Beams and Shells.
Abstract: Preface. List of Boxes. Introduction. Lagrangian and Eulerian Finite Elements in One Dimension. Continuum Mechanics. Lagrangian Meshes. Constitutive Models Solution Methods and Stability. Arbitrary Lagrangian Eulerian Formulations. Element Technology. Beams and Shells. Contact--Impact. Appendix 1: Voigt Notation. Appendix 2: Norms. Appendix 3: Element Shape Functions. Glossary. References. Index.

3,928 citations


"Foreign Object Damage to Fan Rotor ..." refers methods in this paper

  • ...The solid-solid coupling algorithm[3-5], fluid-solid non-coupling algorithm[6], fluid-solid coupling algorithm[7] and contactingimpacting algorithm[8] are the four algorithms used for this purpose, among which the contactingimpacting algorithm is the most effective algorithm....

    [...]

01 Jul 1978
TL;DR: An unsteady, hydrodynamic model of the impact of a low strength projectile on a rigid or semi-rigid target has been developed and impact tests of various materials including birds, gelatin, and RTV rubber have been conducted to validate this theory.
Abstract: : An unsteady, hydrodynamic model of the impact of a low strength projectile on a rigid or semi-rigid target has been developed. Impact tests of various materials including birds, gelatin, and RTV rubber have been conducted to validate this theory. At velocities above 100 m/s, these materials were seen to flow as a fluid upon impact. The resulting impact pressure histories were very similar to those predicted using the model. The impact process was dominated by an initial shock phase which was quickly followed by a release to a steady flow condition. This model should be applicable to the impact of any material for which the shock pressures generated during impact are much greater than the strength of the projectile but are less than the strength of the target. (Author)

150 citations


"Foreign Object Damage to Fan Rotor ..." refers background in this paper

  • ...The rheological phenomenon takes place during high velocity bird impact[21]....

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Journal ArticleDOI
G. R. Johnson1
TL;DR: In this paper, the authors propose a method for customizing a page view by dragging and re-positioning the boxes below the boxes. But this method is limited to a single page view.
Abstract: Related Content Customize your page view by dragging and repositioning the boxes below. Related Journal Articles

94 citations


"Foreign Object Damage to Fan Rotor ..." refers methods in this paper

  • ...The solid-solid coupling algorithm[3-5], fluid-solid non-coupling algorithm[6], fluid-solid coupling algorithm[7] and contactingimpacting algorithm[8] are the four algorithms used for this purpose, among which the contactingimpacting algorithm is the most effective algorithm....

    [...]

Book
01 Jan 1972
TL;DR: In this article, the authors studied the dynamic response of materials, primarily solids, to intensive impulse loadings, both mechanical impact and thermodynamic energy input, for durations in the order of microseconds.
Abstract: The study of the dynamic response of materials, primarily solids, to intensive impulse loadings, both mechanical impact and thermodynamic energy input, for durations in the order of microseconds is discussed in detail. The subjects discussed include: basic conservation laws from the classical fluid mechanics point of view; the propagation of steady discontinuous stress waves; shock waves as studied from the thermodynamics and physics Point of view; constitutive relations and wave propagation in solids from a modern continuum mechanics viewpoint; method of characteristics in unsteady material response problems. introduction to numerical analysis; experimental techniques and instrumentation; and applications dealing with shock waves and high-pressure dynamic material response for scientific, engineering, and military purposes. (LCL)

77 citations


"Foreign Object Damage to Fan Rotor ..." refers methods in this paper

  • ...The solid-solid coupling algorithm[3-5], fluid-solid non-coupling algorithm[6], fluid-solid coupling algorithm[7] and contactingimpacting algorithm[8] are the four algorithms used for this purpose, among which the contactingimpacting algorithm is the most effective algorithm....

    [...]

Journal ArticleDOI
G. R. Johnson1

61 citations


"Foreign Object Damage to Fan Rotor ..." refers methods in this paper

  • ...The solid-solid coupling algorithm[3-5], fluid-solid non-coupling algorithm[6], fluid-solid coupling algorithm[7] and contactingimpacting algorithm[8] are the four algorithms used for this purpose, among which the contactingimpacting algorithm is the most effective algorithm....

    [...]