Influence of Specimen Size on Fatigue Crack Initiation of Welded Hy100 Steel PDF Download

Author: Defence Research Establishment Atlantic
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Book Description

Author: Wolfgang Kreuzer
Publisher:
ISBN:
Category : Metals
Languages : en
Pages : 65

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Book Description

Author: Wolfgang Kreuzer
Publisher:
ISBN:
Category : Metals
Languages : en
Pages : 65

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Book Description

Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 892

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Author: William Herman Munse
Publisher:
ISBN:
Category : Steel, Structural
Languages : en
Pages : 224

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Book Description

Author: Charles M. Gilmore
Publisher:
ISBN:
Category : Metals
Languages : en
Pages : 12

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Book Description
It has been observed that high yield strength metals do not necessarily exhibit an equally high fatigue strength. Thus the dependence of fatigue failure on the precipitate size and distribution is investigated. Also, it is proposed that the permanent axial strain resulting from cyclic torsion is indicative of the metal response to cyclic loading. Microscopic observation of the failed specimens showed that failure at plus or minus 0.005 in/in twist strain occurred by the propagation of a single shear macrocrack linking with shear microcracks. The initiation of the shear microcracks was found to depend upon the precipitate size and distribution. With fine particles localized deformation bands became microcracks, but with coarser particles crack initiation began at the particle-matrix interface. (Author Modified Abstract).

Author: H. P. Lieurade
Publisher:
ISBN:
Category : Metals
Languages : en
Pages : 376

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Author: JM. Barsom
Publisher:
ISBN:
Category : Bruchmechanik
Languages : en
Pages : 22

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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: KJ. Pascoe
Publisher:
ISBN:
Category : Biaxial loading
Languages : en
Pages : 24

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Flat cruciform-shaped specimens of HY100 steel were tested in fatigue under biaxial stress states. For Mode I crack growth, a tensile component of stress parallel to the crack decreased crack growth rate; a compressive component had the opposite effect. These changes in growth rate are explained in terms of the material's differing cyclic stress-strain response under shear and equibiaxial loading.

Author: E. P. Klier
Publisher:
ISBN:
Category :
Languages : en
Pages : 14

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Book Description
The present series of tests for a one-inch-diameter fatigue-notched specimen constitutes an extension of a previous series of tests for a onehalf-inch-diameter specimen. The principal change introduced is the specimen size. This change in specimen size leads to minor variations in the fatigue-notch tensile-strength data, but for certain material conditions and specimen-size ranges the notch strength can be profoundly altered. The ductile-brittle transition indicated is critically dependent on tensile strength. During the present tests load-elongation curves were taken, and these have allowed the examination of the ductile-brittle transition as established by stress, by strain, and by means of energy absorption. The experiments suggest that the stress-strain relations in certain fracture tests correspond to those measured for the notch tensile test. (Author).