Stress concentration analysis of nanosized thin-film coating with rough interface

Kostyrko, Sergey A.; Grekov, Mikhail A.; Altenbach, Holm

doi:10.1007/s00161-019-00780-4

Cited by 25 publications

(12 citation statements)

References 31 publications

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“…However, it is impossible to do this in the case of curved boundary as ζ = ζ. For this purpose, we use the BPM which has been applied recently in several publications to simplify BVP problems associated with complicated geometry and allowed to derive the analytic approximations of considered solutions [7][8][9][10][11][39][40][41].…”

Section: Fig 1 a Model Of Bimaterials With Slightly Perturbated Intementioning

confidence: 99%

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The effect of nonlinear terms in boundary perturbation method on stress concentration near the nanopatterned bimaterial interface

Shuvalov¹,

Vakaeva²,

Shamsutdinov³

et al. 2020

Vestnik SPbSU. Applied Mathematics. Computer Science. Control P

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Based on the Gurtin-Murdoch surface/interface elasticity theory, the article investigates the effect of nonlinear terms in the boundary perturbation method on stress concentration near the curvilinear bimaterial interface taking into account plane strain conditions. The authors consider the 2D boundary value problem for the infinite two-component plane under uniaxial tension. The interface domain is assumed to be a negligibly thin layer with the elastic properties differing from those of the bulk materials. Using the boundary perturbation method, the authors determined a semi-analytical solution taking into account non-linear approximations. In order to verify this solution, the corresponding boundary value problem was solved using the finite element method where the interface layer is modelled by the truss elements. It was shown that the effect of the amplitude-to-wavelength ratio of surface undulation on the stress concentration is nonlinear. This should be taken into account even for small perturbations. It was also found that the convergence rate of the derived solution increases with an increase in the relative stiffness coefficient of the bimaterial system and, conversely, decreases with an increase of the amplitude-to-wavelength ratio.

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Section: Fig 1 a Model Of Bimaterials With Slightly Perturbated Intementioning

confidence: 99%

“…However, as it was mentioned above, it is very important to analyze the stress state around the surface topological defects to predict the material failure. For this purpose, the boundary perturbation method (BPM) has been used extensively [39][40][41]. It should be noted that only the linear approximation of the BPM was analysed in these works.…”

mentioning

confidence: 99%

The effect of nonlinear terms in boundary perturbation method on stress concentration near the nanopatterned bimaterial interface

Shuvalov¹,

Vakaeva²,

Shamsutdinov³

et al. 2020

Vestnik SPbSU. Applied Mathematics. Computer Science. Control P

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“…Interface science is an interdisciplinary branch of learning, involving mechanical, physical, material, and so on, which is being paid more and more attention in recent years. Research on interface science is essential and very important to coating technology [52,53,70,71]. Erosion resistant coatings are generally parallel to the surface of the material.…”

Section: Interface Problemmentioning

confidence: 99%

Key Problems Affecting the Anti-Erosion Coating Performance of Aero-Engine Compressor: A Review

Sun

Jiao

et al. 2019

Coatings

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Sand erosion has always been a key threat to the performance and service life of aero-engines. The compressor, the key component installed at the front of the aero-engine, suffers the most from sand erosion, especially compressors serving in deserts. Ceramic hard coating is a traditional way to improve the hardness and wear resistance of cutting and grinding tools. It may also be used to improve the erosion resistance of aero- engine compressor. However, the mechanism of erosion damage is complicated, which may include wear, secondary erosion, anisotropic erosion, impact, and fatigue. Recent research discovered the major problems with ceramic hard coating on aero-engine compressors. In this paper, these following problems are discussed: the design of coating material and structure, the preparation method and technology, the effects of droplets and clusters of coating surface, microstructure and characteristics of interface. The review of the major problems and possible solutions discussed in this paper may contribute to the future research on erosion coating theoretically and practically.

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“…The problem of the roughness of the interface between coatings and a substrate has received a lot of attention in the literature. Different aspects of this problem were discussed in numerous publications, e.g., see [4,[9][10][11][12]. Experimental studies of thermal barrier coatings [4] have reported that a rough interface leads to a higher interface toughness, and the contribution of friction at the interface between the TBC and bond coat may be the cause of this effect.…”

Section: Introductionmentioning

confidence: 99%

“…Experimental studies of thermal barrier coatings [4] have reported that a rough interface leads to a higher interface toughness, and the contribution of friction at the interface between the TBC and bond coat may be the cause of this effect. An analytical theoretical study of a wavy non-damaged interface between a thin film and a substrate is presented in [12]. The film thickness and interface roughness are in the nanometer range.…”

Section: Introductionmentioning

confidence: 99%

Thermal fracture of functionally graded thermal barrier coatings with pre-existing edge cracks and multiple internal cracks imitating a curved interface

Petrova

Schmauder

2021

Continuum Mech. Thermodyn.

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This work is devoted to the problem of thermal fracture of a functionally graded coating on a homogeneous substrate (FGC/H) with an emphasis on the analysis of a special system of cracks that simulates a curved interface. The FGC/H structure contains the pre-existing crack system in the FGC, both edge cracks (which are often seen in FGC/H structures) and internal cracks. The stress intensity factors are calculated. (Generally, both Mode I and Mode II are nonzero.) Then, using the appropriate fracture criterion for mixed-mode fracture conditions, the crack propagation direction (so-called fracture angles) and critical loads, when this propagation is initiated, are determined. The application of fracture criteria requires knowledge of the fracture toughness near the crack tips. Thus, it is assumed that the fracture toughness of an FGC, as well as other material properties, continuously varies through the thickness of the coating. For multiple cracks, it is also important to know the weakest crack that starts to propagate first, and the initial direction of this growth. Therefore, the main attention is paid to the evaluation of the fracture angles for the cracks for different parameters of the FGC/H structure. Both cases of a homogeneous semi-infinite medium with a system of cracks imitating a curved interface and FGC/H structures with identical crack systems are studied.

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Stress concentration analysis of nanosized thin-film coating with rough interface

Cited by 25 publications

References 31 publications

The effect of nonlinear terms in boundary perturbation method on stress concentration near the nanopatterned bimaterial interface

The effect of nonlinear terms in boundary perturbation method on stress concentration near the nanopatterned bimaterial interface

Key Problems Affecting the Anti-Erosion Coating Performance of Aero-Engine Compressor: A Review

Thermal fracture of functionally graded thermal barrier coatings with pre-existing edge cracks and multiple internal cracks imitating a curved interface

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