Numerical Solution of Fatigue Stress in Journal Bearing

Hasan, Basri (2007) Numerical Solution of Fatigue Stress in Journal Bearing. NAE 2007, 5 (1). IC STAR, University of Sumatera Utara, Medan, Indonesia. ISBN 979-96139-6-7

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    Failure of fatigue is damaged materials where caused frequent load. Fatigue owing to some factors, which is Stress concentration on fatigue, Stress life, Effect size and surface, and Change properties of surface. The fatigue failure of a material is dependent on the interaction of a large stress with a critical flow. In essence, fatigue is controlled by the weakest link of the material, with the probability of a weak link increasing with material volume. This phenomenon is evident in the fatigue test results of a material using specimens of varying diameters. From this research we can get effect of concentration stress on strength fatigue with S-N method. On this method only count fatigue life or endurance limit from Journal bearing housing. By Finite Element Analysis, it is not so easy to determine fatigue life. When we find the first yield point, it means this point is in the highest stress state. Then we can refer S-N curve. In this paper, the effect of bearing and housing elasticity on the stress field, which could result in surface fatigue in journal bearing, has been investigated. This condition is proved with occurred slip lines on surface of specimen. These slip lines are caused on some thousands stress cycles. Additional crack is happened immediately and finally long enough crack. So that formed unstable crack that caused fracture of brittleness or fracture of toughness because section of specimen cannot keep down load.

    Item Type: Book
    Uncontrolled Keywords: FEM, Fatigue Life, Yield Point, S-N curve, Journal Bearing
    Subjects: T Technology > TJ Mechanical engineering and machinery
    Divisions: Faculty of Engineering > Department of Mechanical Engineering
    Depositing User: Prof. Dr. Ir Hasan Basri
    Date Deposited: 10 Apr 2017 07:01
    Last Modified: 10 Apr 2017 07:01

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