Search engine for discovering works of Art, research articles, and books related to Art and Culture
Javascript must be enabled to continue!
Effect of Corrosion Pit on the Structural Characteristics of Foil Journal Bearings
View through CrossRef
Abstract
Due to corrosive environment, material loss in a localized area leads to formation of a corrosion pit. It diminishes the structural integrity and performance of product. To predict and analyze the effect of corrosion pit on the performance of gas foil bearings (GFBs), FEM analysis of bump-type GFBs is carried out. The effect of corrosion pit is investigated for three different shapes: circular, square and triangular. In this study, the FEM analysis of bump-type GFBs is performed in ANSYS software. Firstly, the influence of a corrosion pit is analyzed for various shapes under different pressure loading. These results show that the presence of a corrosion pit developed high-stress crack intensity, which can result in crack initiation in foil bearings. As pressure loading increased, the stress crack intensity in foil bearings increased. Among different pit shapes, the circular pit shape induces the maximum stress crack intensity in foil bearings, which shows that the crack initiation in foil bearings is observed for a circular pit. Then, the influence of a corrosion pit on the structural stiffness of foil bearings is evaluated for various foil materials under different friction coefficients. These results show that the influence of friction coefficient in foil bearings is increased within the presence of a corrosion pit.
American Society of Mechanical Engineers
Title: Effect of Corrosion Pit on the Structural Characteristics of Foil Journal Bearings
Description:
Abstract
Due to corrosive environment, material loss in a localized area leads to formation of a corrosion pit.
It diminishes the structural integrity and performance of product.
To predict and analyze the effect of corrosion pit on the performance of gas foil bearings (GFBs), FEM analysis of bump-type GFBs is carried out.
The effect of corrosion pit is investigated for three different shapes: circular, square and triangular.
In this study, the FEM analysis of bump-type GFBs is performed in ANSYS software.
Firstly, the influence of a corrosion pit is analyzed for various shapes under different pressure loading.
These results show that the presence of a corrosion pit developed high-stress crack intensity, which can result in crack initiation in foil bearings.
As pressure loading increased, the stress crack intensity in foil bearings increased.
Among different pit shapes, the circular pit shape induces the maximum stress crack intensity in foil bearings, which shows that the crack initiation in foil bearings is observed for a circular pit.
Then, the influence of a corrosion pit on the structural stiffness of foil bearings is evaluated for various foil materials under different friction coefficients.
These results show that the influence of friction coefficient in foil bearings is increased within the presence of a corrosion pit.
Related Results
Investigating the Effect of High Pressures and Temperatures on Corrosion Inhibition for Water-Based Muds
Investigating the Effect of High Pressures and Temperatures on Corrosion Inhibition for Water-Based Muds
Corrosion is defined as gradual degradation of metal caused by a chemical or electrochemical reaction with its environment. In oil and gas sector, components can corrode at any sta...
Recent Patents on Cageless Rolling Bearings
Recent Patents on Cageless Rolling Bearings
Background:
Rolling bearings are widely used as core components in mechanical
equipment. Most bearings are equipped with a cage. However, when bearings work under conditions
of lar...
Pit-1 Gene Expression in Human Pituitary Adenomas
Pit-1 Gene Expression in Human Pituitary Adenomas
The anterior pituitary-specific transcription factor Pit-1 (also known as GHF-1) was initially identified and cloned as a transactivator of the GH and PRL genes, and later as a reg...
Morphometry of an hexagonal pit crater in Pavonis Mons, Mars
Morphometry of an hexagonal pit crater in Pavonis Mons, Mars
<p><strong>Introduction:</strong></p>
<p>Pit craters are peculiar depressions found in almost every terrestria...
Evaluation of Coated Top Foil Bearings: Dry Friction, Drag Torque, and Dynamic Force Coefficients
Evaluation of Coated Top Foil Bearings: Dry Friction, Drag Torque, and Dynamic Force Coefficients
Despite their many advantages, bump-type foil bearings (BFBs) have issues of dry-friction during sliding contact at rotor start/stop cycles. To prevent premature wear of both shaft...
Head-to-head hydrodynamic performance comparison of six foil setups with four and two foil configurations on trimarans in different operational conditions
Head-to-head hydrodynamic performance comparison of six foil setups with four and two foil configurations on trimarans in different operational conditions
Achieving high efficiency and performance is essential in both the commercial and maritime sectors, where the selection of foil configurations significantly influences a vessel's o...
Foil Bearings Makes Oil-Free Turbocharger Possible
Foil Bearings Makes Oil-Free Turbocharger Possible
This paper describes an oil-free, 150 Hp turbocharger that was successfully operated with compliant foil bearings in a range of pitch and roll angles, including vertical operation,...
Study on Deformation Characteristics of Deep Foundation Pit Soil and Retaining Structure of Subway Station in Guangzhou Area With Composite Strata
Study on Deformation Characteristics of Deep Foundation Pit Soil and Retaining Structure of Subway Station in Guangzhou Area With Composite Strata
The excavation of the deep foundation pit of subway station may cause excessive deformation of foundation pit and retaining structure and then pose a threat to the safety of surrou...