Bio: Chen Wei is an academic researcher from Nanjing University of Aeronautics and Astronautics. The author has contributed to research in topics: Rotor (electric) & Kevlar. The author has an hindex of 3, co-authored 3 publications receiving 51 citations.
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.
TL;DR: In this paper, the anti-foreign object damage design for the fan rotor blades of an aeroengine is provided. And the conditions of experiment for bird impact to blades have been improved.
TL;DR: In this paper, a numerical simulation method was developed to provide effective tools to estimate the ballistic resistance of Kevlar 49 fabric for gas turbine engine containment system in LS-DYNA.
Abstract: A numerical simulation method was developed to provide effective tools to estimate the ballistic resistance of Kevlar 49 fabric for gas turbine engine containment system in LS-DYNA. Material model based on representative unit cell and three-element viscoelastic constitutive equation was employed to describe the dynamic response of single-layer and multi-layer fabrics. The influences of mesh size, hourglass control method in the material model were discussed. The numerical simulation method is used to predict the ballistic performance of Kevlar fabrics in testing condition. The failure mechanism, the stress wave propagation and energy absorption mechanism were investigated and compared with testing results and achieved good agreements. It is indicated that the developed numerical method provides promising results in modelling the high-speed ballistic impact events and engine fan blade off events.
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.
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.
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.
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...
TL;DR: In this paper, three types of multi-phase shear thickening fluid (STF) treated high-strength fabrics were manufactured by adding graphene oxide (GO) and carbon nanotubes (CNTs) to a nanosilica suspension system.
Abstract: The current study focus on the multi-phase Shear thickening fluid (STF) treated high-strength fabrics which is an promising material for soft-wall containment casing. Three types of multi-phase STF were manufactured by adding graphene oxide (GO) and carbon nanotubes (CNTs) to a nanosilica suspension system. Steady rheological property tests and yarn pull-out tests were conducted to determine the shear thickening behavior of the multi-phase STFs and inter-yarn friction of their compound fabrics. Ballistic impact tests were conducted using titanium blade-like projectiles. The energy absorption, deformation evolution and damage patterns were investigated. Tests show that the addition of GO and CNTs resulted in a higher initial viscosity, a lower shear rate for onset of shear thickening and a lower thickening ratio. The enhancement of the frictional force is more striking for multi-phase STFs. The GO additives have the highest deformation in the ballistic impact tests, corresponding to the greatest energy absorption with a ballistic performance index 78.3% higher than that of neat fabrics. The results show great potential for reducing the weight of containment casing.