The Influence of Thickness on the Properties of Air Plasma Sprayed Ceramic Blend at Room Temperature

Hansel, Jason

doi:10.1002/9780470584293.ch8

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…Resonant frequencies and system loss factors were measured for the bare beams, for the same beams after applying the bond coat, and again after applying the ceramic. As satisfactory consistency was found between results obtained with four specimens tested in the three modes (Hansel, 2008), only data obtained in the 3 rd cantilever bending mode with two of the specimens (#214 and #216) are used here. Resonant frequencies measured for the beams with bond coat only, and after addition of the titania-alumina blend coating are shown in Fig.…”

Section: Test Procedures Parameters and Datamentioning

confidence: 93%

Determination of mechanical properties of non-linear coatings from measurements with coated beams

Torvik

2009

International Journal of Solids and Structures

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a b s t r a c tCoatings are applied to structural components for several various reasons, such to protect against erosion or corrosion, as thermal barrier coatings, or to increase the energy dissipation. As determining the material properties of such coatings from homogeneous specimens is often difficult, it is sometimes necessary to conduct testing on coated specimens, with the properties of the coating then to be extracted from the results of testing. A methodology for doing this is given here. While applicable to other materials, the properties of such coatings as ceramics, metallics, or compounds to be applied to rotating and static components of gas turbines are of special interest. Such materials present a special challenge as the mechanical properties have generally been found to display a strong dependence on the amplitude of cyclic strain. Application of the methodology requires careful measurement of specimen dimensions, weights, natural frequencies, and system loss factors before and after coating. From these, the storage (Young's) modulus, the loss modulus, and the loss factor can be extracted. The methodology is demonstrated through the use of data taken on flat specimens of titanium with plasma-sprayed coatings of NiCrAlY and a titania-alumina blend ceramic, vibrating in a cantilever mode.

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Section: Test Procedures Parameters and Datamentioning

confidence: 93%

Determination of mechanical properties of non-linear coatings from measurements with coated beams

Torvik

2009

International Journal of Solids and Structures

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“…Recently increased attention has been paid to the structural vibration-suppression with hard coating because it can reduce the vibration stress under high temperature or highly corrosive environment [1][2][3]. Several scholars and researchers [4][5][6] have experimentally studied the vibration characteristics of thin-walled structures with hard coating, such as beams, plates, and shells; they found that the coating can not only contribute to increasing structural damping as well as reducing the amplitude of resonant vibrations, but also lead to nonlinear characteristics to the coated structure. For example, Ivancic and Palazotto [4] and Blackwell et al [5] measure inherent characteristic of titanium plate coated with magnesium aluminate spinel, they found that its frequency response curve was not symmetric about resonance frequency at certain mode and the value of resonance frequency decreased with the increase of the amplitude of the applied force, indicating some characteristics of nonlinear stiffness, and they called this phenomenon "strain softening.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Nonlinear Vibration of Hard Coating Thin Plate by Finite Element Iteration Method

Liu

Sun

2014

Shock and Vibration

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This paper studies nonlinear vibration mechanism of hard coating thin plate based on macroscopic vibration theory and proposes finite element iteration method (FEIM) to theoretically calculate its nature frequency and vibration response. First of all, strain dependent mechanical property of hard coating is briefly introduced and polynomial method is adopted to characterize the storage and loss modulus of coating material. Then, the principle formulas of inherent and dynamic response characteristics of the hard coating composite plate are derived. And consequently specific analysis procedure is proposed by combining ANSYS APDL and self-designed MATLAB program. Finally, a composite plate coated with MgO + Al2O3is taken as a study object and both nonlinear vibration test and analysis are conducted on the plate specimen with considering strain dependent mechanical parameters of hard coating. Through comparing the resulting frequency and response results, the practicability and reliability of FEIM have been verified and the corresponding analysis results can provide an important reference for further study on nonlinear vibration mechanism of hard coating composite structure.

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Vibration analysis of hard-coated composite beam considering the strain dependent characteristic of coating material

Sun

Liu

2016

Acta Mech. Sin.

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The Influence of Thickness on the Properties of Air Plasma Sprayed Ceramic Blend at Room Temperature

Cited by 4 publications

References 12 publications

Determination of mechanical properties of non-linear coatings from measurements with coated beams

Determination of mechanical properties of non-linear coatings from measurements with coated beams

Analysis of Nonlinear Vibration of Hard Coating Thin Plate by Finite Element Iteration Method

Vibration analysis of hard-coated composite beam considering the strain dependent characteristic of coating material

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