Uncertainty analysis for rolling contact fatigue failure probability of silicon nitride ball bearings

Pattabhiraman, Sriram; Levesque, George; Kim, Nam Hoon; Arakere, Nagaraj K.

doi:10.1016/j.ijsolstr.2010.05.018

Cited by 34 publications

(12 citation statements)

References 28 publications

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“…To calculate a o in Eq. (14), the fracture toughness K IC listed in Table 1 was used, and the scale parameter r o was determined as being equal to the X-direction maximum thermal stress as obtained from FEM analysis at DT o in Table 3. In addition, m was given as the value for the ceramic balls listed in Table 3.…”

Section: Resultsmentioning

confidence: 99%

“…Many studies have addressed the issue of strength and ring crack initiation [2][3][4], crushing [5,6], and the tensile fracture of a notched ceramic ball [7] under quasi-static loading, as well as the rolling contact fatigue strength properties [8][9][10][11][12][13][14][15][16][17][18][19] at room and high temperatures. On the other hand, many studies have addressed the fracture behavior, fracture strength properties, and the evaluation of monolithic ceramics subjected to thermal shock [20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

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Fracture characteristics of silicon nitride ceramic ball subjected to thermal shock

Matsuda

2016

J Mater Sci

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The aim of this study was to clarify the fracture characteristics of ceramic balls, as used in bearings, when subjected to thermal shock. First, water-quench tests were performed on ceramic balls of a range of sizes. The fracture morphology and fracture surface were then observed. The crack propagation and branching behaviors were observed on the surfaces of the ceramic balls after they had been subjected to thermal shock. Manufacturing flaws were then observed on the surface of the fractures in the ruptured ceramic balls. Next, the relationship between the fracture strength, as calculated using a FEM analysis of the temperature difference at thermal shock fracture initiation and the equivalent crack length calculated from the manufacturing flaw size, was theoretically discussed to introduce a virtual crack model. As a result, it was concluded that the relationship can be estimated by applying a virtual crack model based on experimental data obtained from fracture strength tests for the difference fracture type, i.e., the temperature difference depends on the size of the manufacturing flaw. Finally, the temperature difference scatter was theoretically discussed based on the results of the two-parameter Weibull distribution in conjunction with a virtual crack model.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fracture characteristics of silicon nitride ceramic ball subjected to thermal shock

Matsuda

2016

J Mater Sci

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“…This means if the crack starts to grow, it will always lead to structural failure. The corresponding limit state equation can be written as [31]:…”

Section: Considered Limit Statementioning

confidence: 99%

Structural Reliability of Plain Bearings for Wave Energy Converter Applications

2016

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Abstract:The levelized cost of energy (LCOE) from wave energy converters (WECs) needs to be decreased in order to be able to become competitive with other renewable electricity sources. Probabilistic reliability methods can be used to optimize the structure of WECs. Optimization is often performed for critical structural components, like welded details, bolts or bearings. This paper considers reliability studies with a focus on plain bearings available from stock for the Wavestar device, which exists at the prototype level. The Wavestar device is a point absorber WEC. The plan is to mount a new power take-off (PTO) system consisting of a discrete displacement cylinder (DDC), which will allow different hydraulic cycles to operate at constant pressure levels. This setup increases the conversion efficiency, as well as decouples the electricity production from the pressure variations within the hydraulic cycle when waves are passing. The new PTO system leads to different load characteristics at the floater itself compared to the actual setup where the turbine/generator is directly coupled to the fluctuating hydraulic pressure within the PTO system. This paper calculates the structural reliability of the different available plain bearings planned to be mounted at the new PTO system based on a probabilistic approach, and the paper gives suggestions for fulfilling the minimal target reliability levels. The considered failure mode in this paper is the brittle fatigue failure of plain bearings. The performed sensitivity analysis shows that parameters defining the initial crack size have a big impact on the resulting reliability of the plain bearing.

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“…Parameters such as the coefficient of friction, the material properties or the geometric characteristics are currently uncertain data (Heussaff et al, 2012). Their variations have, for example, repercussions on contact pressure, on displacements and more generally on the behavior of solids (Pattabhiraman et al, 2010;Sarrouy et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Finite element analysis of frictionless contact problems using fuzzy control approach

Massa

Quan

Cazier

et al. 2015

Engineering Computations

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Purpose -The purpose of this paper is to present a new way to solve numerically a mechanical frictionless contact problem within a context of multiple sampling, frequently used to design robust structures. Design/methodology/approach -This paper proposes to integrate a control-based approach, currently used in automation domain, for the solving of non-linear mechanical problem. More precisely, a fuzzy logic controller is designed to create a link between the normal gaps identified between the bodies and the normal contact pressures applied at the interface. Findings -With this new strategy, the initial non-linear problem can be decomposed into a set of reduced linear problems solved using the finite element method. A projection built from the modal bases of each component in contact is considered to reduce computational time. Moreover, the proposed numerical applications highlight an interesting compromise between computation time and precision of contact data. Research limitations/implications -Currently, the proposed Fuzzy Logic Controller for Contact method has been developed for a frictionless contact problem in the case of 2D numerical applications. Therefore, as obtained results are very interesting, it will be possible to expand on these works in a future works for more complex problems including friction, 3D model and transient dynamic responses by adding other controllers. Originality/value -In conclusion, this paper highlights the interest of studying a contact problem by considering automation approaches and defines the basis of future multidisciplinary works.

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Uncertainty analysis for rolling contact fatigue failure probability of silicon nitride ball bearings

Abstract: International Journal of Solids and Structures 47 (2010) 2543-2553. doi:10.1016/j.ijsolstr.2010.05.018Received by publisher: 2010-01-17Harvest Date: 2016-01-04 12:19:58DOI: 10.1016/j.ijsolstr.2010.05.018Page Range: 2543-255

Cited by 34 publications

References 28 publications

Fracture characteristics of silicon nitride ceramic ball subjected to thermal shock

Fracture characteristics of silicon nitride ceramic ball subjected to thermal shock

Structural Reliability of Plain Bearings for Wave Energy Converter Applications

Finite element analysis of frictionless contact problems using fuzzy control approach

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