Ceramic coatings: A phenomenological modeling for damping behavior related to microstructural features

Tassini, N.; Patsias, Sophoclis; Lambrinou, Konstantina

doi:10.1016/j.msea.2006.04.140

Cited by 29 publications

(17 citation statements)

References 5 publications

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“…nonlinear) damping and stiffness behavior. This dependency has been reported first by Cross et al (1973) about four decades ago and rediscovered by Patsias and co-workers (Shipton and Patsias, 2003;Patsias et al, 2004;Tassini et al, 2006Tassini et al, , 2007 and Palazotto and co-workers (Ivancic, 2003;Ivancic and Palazotto, 2005;Blackwell et al, 2007;Reed, 2007;Reed et al, 2007;Pearson, 2008), where plasma sprayed ceramic coatings on metal substrates were investigated for damping capacity. This nonlinear behavior has resulted in numerous problems with regard to accurately characterizing and modeling these materials.…”

Section: Introductionmentioning

confidence: 74%

“…doi:10.1016/j.ijsolstr.2010.04.016 thermal barrier coatings (TBCs) to protect engine components from high temperatures and corrosion. In fact, recent research have indicated that ceramic TBCs can also provide some degree of vibration damping (Shipton and Patsias, 2003;Patsias et al, 2004;Tassini et al, 2006Tassini et al, , 2007Blackwell et al, 2007;Reed, 2007;Reed et al, 2007;Lauwagie et al, 2008;Pearson, 2008). However, constitutive modeling of this damping has been very limited in the literature due to the complex nonlinear damping behavior of these TBCs and due to the absence of a microstructural understanding of the origin of such nonlinear damping behavior.…”

Section: Introductionmentioning

confidence: 99%

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Micromechanical theoretical and computational modeling of energy dissipation due to nonlinear vibration of hard ceramic coatings with microstructural recursive faults

Al‐Rub

Palazotto

2010

International Journal of Solids and Structures

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a b s t r a c tEngine failures due to high-cycle fatigue during severe dynamic vibration have cost the US Air Force an estimated $400 million dollars per year over the past two decades. Therefore, structural materials that exhibit high damping capacities are desirable for mechanical vibration suppression and acoustic noise attenuation. Few experimental studies suggested that hard ceramic coatings, which are commonly used as thermal barrier coatings (TBCs) to protect engine components from high temperatures and corrosion, can also serve as passive dampers due to their unique microstructure which consists of several layers of splats with inter-and intra-microstructural recursive faults (micro-cracks). Therefore, the focus of this study is on the development of a fundamental understanding of the unique microstructural features and mechanisms responsible for this observed energy dissipation in ceramic coatings under nonlinear vibration through the development of a micromechanical computational framework. Inter-and intrafatigue damage and internal friction is simulated through the development of thermodynamic-based nonlinear cohesive laws that consider interfacial degradation, debonding, plastic sliding, and Coulomb/ contact friction between the interfaces of microstructural faults. Representative volume element-based micromechanical simulations are conducted in order to assess the main micromechanical mechanisms responsible for the experimentally observed nonlinear (amplitude-and frequency-dependent) damping in plasma sprayed hard ceramic coatings. It is concluded that the major part of energy dissipation is achieved through contact friction which results from sliding of the splat interfaces along the microstructural recursive faults. Energy dissipation due to progressive decohesion and evolution of new microcracks is not that significant as compared to energy dissipated due to increased friction from existing and new created faults. Therefore, internal friction is the main mechanism that makes TBCs effective dampers.

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Section: Introductionmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Micromechanical theoretical and computational modeling of energy dissipation due to nonlinear vibration of hard ceramic coatings with microstructural recursive faults

Al‐Rub

Palazotto

2010

International Journal of Solids and Structures

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“…Coatings can also be employed to increase the global dissipative properties of an industrial component with limited influence on the other mechanical properties [10][11][12]. Mechanical components with high stiffness, resistance and vibration damping specifications are in great demand for most …”

Section: Introductionmentioning

confidence: 99%

Experimental Evaluation and Modeling of the Damping Properties of Multi-Layer Coated Composites

2018

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Abstract:In this work, the dissipative properties of different coating solutions are compared and a beam mechanical model, taking into account of dissipative actions at the interface between different layers is proposed. The aim is to find optimal coatings to be employed in the production of composites with high damping properties. The investigated coating layers are obtained from different materials and production processes, and are applied on different metallic substrates. The composite specimens, in the form of slender beams, are tested by means of forced excitation dynamic measurements. Force and displacement experimental data, in a wide range of excitation frequencies, are used to estimate the system damping properties. Homogeneous, uncoated specimens are also tested for comparison. A specific identification procedure is used to identify the specimens stress-strain relationship in the frequency domain. The ratio of the imaginary part and the modulus of the specimen estimated complex frequency response function is considered as a measurement of the damping behaviour. A modified third order multi layered beam model, based on the zig-zag beam theory, is proposed. The model takes into account the contribution to the damping behaviour of the frictional actions and slipping at the interface between layers. Frictional actions are modelled by means of a complex, elasto-hysteretic contribution.

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“…Blackwell et al [8] experimentally studied the damping effects of hard-coating coated on the titanium plate and found its significant nonlinear damping characterization. Several research works, e.g., [9,10], indicated that both the elastic and damping properties of hard-coatings exhibit obvious nonlinearity, as well. Furthermore, Torvik [11] successfully extracted the mechanical parameters of hard-coating, such as the storage modulus and the loss factor, which are dependent on the equivalent strain amplitude and mainly responsible for the nonlinearity of the hard-coating structures.…”

Section: Introductionmentioning

confidence: 99%

A New Finite Element Formulation for Nonlinear Vibration Analysis of the Hard-Coating Cylindrical Shell

2017

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Abstract:In this paper, a four-node composite cylindrical shell finite element model based on Love's first approximation theory is proposed to solve the nonlinear vibration of the hard-coating cylindrical shell efficiently. The developed model may have great significance for vibration reduction of the cylindrical shell structures of the aero engine or aircraft. The influence of the strain dependence of the coating material on the complex stiffness matrix is considered in this model. Nonlinear iterative solution formulas with a unified iterative method are theoretically derived for solving the resonant frequency and response of the composite cylindrical shell. Then, a cylindrical shell coated with a thin layer of NiCoCrAlY + yttria-stabilized zirconia (YSZ) is chosen to demonstrate the proposed formulation, and the rationality is validated by comparing with the finite element iteration method (FEIM). Results show that the developed finite element method is more efficient, and the hard-coating cylindrical shell has the characteristics of soft nonlinearity due to the strain dependence of the coating material.

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Ceramic coatings: A phenomenological modeling for damping behavior related to microstructural features

Cited by 29 publications

References 5 publications

Micromechanical theoretical and computational modeling of energy dissipation due to nonlinear vibration of hard ceramic coatings with microstructural recursive faults

Micromechanical theoretical and computational modeling of energy dissipation due to nonlinear vibration of hard ceramic coatings with microstructural recursive faults

Experimental Evaluation and Modeling of the Damping Properties of Multi-Layer Coated Composites

A New Finite Element Formulation for Nonlinear Vibration Analysis of the Hard-Coating Cylindrical Shell

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