Polymer, metal, and ceramic matrix composites for advanced aircraft engine applications

Mcdanels, D. L.; Serafini, T. T.; DiCarlo, James A.

doi:10.1007/bf02833463

Cited by 33 publications

(8 citation statements)

References 7 publications

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“…Polyimides are used safely in extreme thermomechanical and chemical conditions, thanks to their high glass transition temperature and low creep properties [21]. Practical uses of polyimide films include electronic circuits, wire insulations, and composite components in aero-engines, turbine blades, and launch vehicles [22][23][24][25]. We elect to test polyimide samples for several reasons.…”

Section: Methodsmentioning

confidence: 99%

Experimental Investigation of Energy Dissipation in Presliding Spherical Contacts Under Varying Normal and Tangential Loads

Usta

Shinde

Eriten

2017

Journal of Tribology

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Interfacial damping in assembled structures is difficult to predict and control since it depends on numerous system parameters such as elastic mismatch, roughness, contact geometry, and loading profiles. Most recently, phase difference between normal and tangential force oscillations has been shown to have a significant effect on interfacial damping. In this study, we conduct microscale (asperity-scale) experiments to investigate the influence of magnitude and phase difference of normal and tangential force oscillations on the energy dissipation in presliding spherical contacts. Our results show that energy dissipation increases with increasing normal preload fluctuations and phase difference. This increase is more prominent for higher tangential force fluctuations, thanks to larger frictional slip along the contact interface. We also show that the energy dissipation and tangential fluctuations are related through a power law. The power exponents we identify from the experiments reveal that contacts deliver a nonlinear damping for all normal preload fluctuation amplitudes and phase differences investigated. This is in line with the damping uncertainties and nonlinearities observed in structural dynamics community.

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Section: Methodsmentioning

confidence: 99%

Experimental Investigation of Energy Dissipation in Presliding Spherical Contacts Under Varying Normal and Tangential Loads

Usta

Shinde

Eriten

2017

Journal of Tribology

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“…This was originally a successful strategy and allowed aerospace manufacturers to offer competitive high performance products. However, as producers of new materials began to develop lighter and more structurally sound components, the use of conventional metallic materials underwent a decreasing trend [1]. In particular, the high strength-to-weight and high stiffness-to-weight properties of plastics, polymer-based composites and hybrid materials made them attractive alternatives for structural applications over a wide range of service conditions [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

An application of the analytic network process in multiple criteria material selection

Milani¹,

Shanian²,

Lynam³

et al. 2013

Materials & Design

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“…For curbing emission of carbon dioxide and improving fuel consumption, the weight reduction of high‐pressure turbines is demanded for next‐generation aircraft engines 1‐3 . Increasing turbine inlet temperature is also an effective method to improve fuel efficiency because an increased ratio between maximum and minimum temperatures of thermodynamic cycle results in a high thermal efficiency 4,5 .…”

Section: Introductionmentioning

confidence: 99%

Homogenized model of environmental barrier coatings for evaluation of energy release rate

Kawai

Kubo

Umeno

2021

Int J Applied Ceramic Tech

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For efficient calculation of energy release rate (ERR) for interface cracks in environmental barrier coatings (EBCs) with a columnar layer, we propose a simple and versatile homogenization method of the columnar layer. The columnar layer consisting of a number of fine columns is modeled as an anisotropic homogenized layer whose elastic properties are isotropic in the plane perpendicular to the layer thickness direction. The homogenization was achieved by a finite element method (FEM) analysis for a single columnar model to obtain elastic parameters that characterize the homogenized layer. For validation of the homogenization method, we conduct an FEM analysis for a typical EBC structure and obtain the ERRs of an interface crack with various crack length and columnar size. We demonstrate that the homogenization method provides estimation of ERR with a good accuracy on the safer side, which is advantageous for EBC structure design. In addition, the method can reduce the calculation time by more than 50%. From these results, we conclude that the proposed homogenization method can be applied generally for estimation of ERR in EBCs with a columnar layer.

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Polymer, metal, and ceramic matrix composites for advanced aircraft engine applications

Cited by 33 publications

References 7 publications

Experimental Investigation of Energy Dissipation in Presliding Spherical Contacts Under Varying Normal and Tangential Loads

Experimental Investigation of Energy Dissipation in Presliding Spherical Contacts Under Varying Normal and Tangential Loads

An application of the analytic network process in multiple criteria material selection

Homogenized model of environmental barrier coatings for evaluation of energy release rate

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