Effect of Stress Concentration on Fatigue-Crack Initiation in HY-130 Steel PDF Download
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Author: JM. Barsom Publisher: ISBN: Category : Bruchmechanik Languages : en Pages : 22
Book Description
The useful fatigue life of structural components is determined by the sum of the elapsed load cycles required to initiate a fatigue crack and to propagate the crack from subcritical size to critical dimensions. Thus, to predict the service life of many steel structures and to establish safe inspection intervals, an understanding of the fatigue-crack-initiation and fatigue-crack-propagation behavior in steel is required. In the present study, the fatigue-crack-initiation life in HY-130 steel was investigated by testing specimens having widely varying notch acuities. The variation in notch acuity covered the range from fatigue-cracked specimens to polished, unnotched specimens, and fatigue-crack-initiation data were obtained in the range 103 to 106 cycles. The data were analyzed by using linear-elastic fracture-mechanics concepts and the theory of stress concentration in notched specimens.
Author: JM. Barsom Publisher: ISBN: Category : Bruchmechanik Languages : en Pages : 22
Book Description
The useful fatigue life of structural components is determined by the sum of the elapsed load cycles required to initiate a fatigue crack and to propagate the crack from subcritical size to critical dimensions. Thus, to predict the service life of many steel structures and to establish safe inspection intervals, an understanding of the fatigue-crack-initiation and fatigue-crack-propagation behavior in steel is required. In the present study, the fatigue-crack-initiation life in HY-130 steel was investigated by testing specimens having widely varying notch acuities. The variation in notch acuity covered the range from fatigue-cracked specimens to polished, unnotched specimens, and fatigue-crack-initiation data were obtained in the range 103 to 106 cycles. The data were analyzed by using linear-elastic fracture-mechanics concepts and the theory of stress concentration in notched specimens.
Author: T. P. (Thomas Philip) Nikiforuk Publisher: ISBN: Category : Steel Languages : en Pages : 41
Book Description
Fatigue initiation studies were performed on a potential hydrofoil material, HY130 steel, using a Tatnal-Krause type fatigue testing machine. The welded HY130 steel shows fatigue endurance properties of 480 MPa (70 Ksi) when in the ground and polished condition, the condition which would be present in the highly stressed areas of a foil. In the as-welded condition, the material shows an endurance limit of 240 MPa (35 Ksi) at a stress ratio of R = + 1/2. Local high residual tensile stresses, due to welding, have little, if any, effect on the fatigue initiation properties of the welded HY130 steel specimens. (Author).
Author: Wen-Ching Chen Publisher: ISBN: Category : Materials Languages : en Pages : 146
Book Description
An analytical model for nonarbitrarily defining the crack initiation length of a notched member on the basis of the minimum total life estimate is proposed. This model provides an interpretation of fatigue notch size effect and a.
Author: Alexander Blake Publisher: CRC Press ISBN: 9780824796785 Category : Technology & Engineering Languages : en Pages : 458
Book Description
Emphasizing a balanced approach to design that integrates fracture mechanics, materials science and stress analysis, this work explains the fundamentals of fracture and provides clear definitions, basic formulas and worked examples. Case studies highlight fracture mechanics parameters of particular materials and hands-on stress analysis techniques.
Author: Richard Roberts Publisher: ISBN: Category : Bridges Languages : en Pages : 218
Book Description
This report provides an introduction to the elements of fracture mechanics for bridge design. Fracture mechanics concepts are introduced and used as the basis for understanding fatigue and fracture in bridge structures. Various applications are cited.
Author: Subra Suresh Publisher: Cambridge University Press ISBN: 9780521578479 Category : Technology & Engineering Languages : en Pages : 708
Book Description
Written by a leading researcher in the field, this revised and updated second edition of a highly successful book provides an authoritative, comprehensive and unified treatment of the mechanics and micromechanisms of fatigue in metals, non-metals and composites. The author discusses the principles of cyclic deformation, crack initiation and crack growth by fatigue, covering both microscopic and continuum aspects. The book begins with discussions of cyclic deformation and fatigue crack initiation in monocrystalline and polycrystalline ductile alloys as well as in brittle and semi-/non-crystalline solids. Total life and damage-tolerant approaches are then introduced in metals, non-metals and composites followed by more advanced topics. The book includes an extensive bibliography and a problem set for each chapter, together with worked-out example problems and case studies. This will be an important reference for anyone studying fracture and fatigue in materials science and engineering, mechanical, civil, nuclear and aerospace engineering, and biomechanics.
Author: CT. Fujii Publisher: ISBN: Category : Corrosion and anti-corrosives Languages : en Pages : 13
Book Description
The influence of chloride ions, pH, potential, and chromate ions on fatigue crack growth rates of HY-130 steel in aqueous solutions were examined. Crack growth rates (da/dN) were determined as functions of stress intensity factor range (?K) over the ?K-interval of approximately 20 to 90 MPA?m, and environmental effects were evaluated by comparison with similar data for HY-130 obtained in air. All fatigue experiments were conducted at a maximum stress intensity factor (Kmax)
Author: Stanley Theodore Rolfe Publisher: ASTM International ISBN: Category : Fracture mechanics Languages : en Pages : 527
Book Description
Emphasizes applications of fracture mechanics to prevent fracture and fatigue failures in structures, rather than the theoretical aspects of fracture mechanics. The concepts of driving force and resistance force are used to differentiate between the mathematical side and the materials side. Case studies of actual failures are new to the third edition. Annotation copyrighted by Book News, Inc., Portland, OR
Author: JM. Barsom
Author: JM. Barsom
Author: T. P. (Thomas Philip) Nikiforuk
Author: Wen-Ching Chen
Author: Paul C. Paris
Author: United States. Federal Highway Administration. Offices of Research and Development
Author: Alexander Blake
Author: Richard Roberts
Author: Subra Suresh
Author: CT. Fujii
Author: Stanley Theodore Rolfe