Crack Initiation, Slow Crack Growth, and Unstable Propagation of Ductile Fracture in Mild Steels in a Laboratory Experiment PDF Download
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Author: M. Ogasawara Publisher: ISBN: Category : Charpy shelf energy Languages : en Pages : 7
Book Description
A laboratory test for the unstable ductile fracture of mild steels was developed. A shear crack was initiated from a very deep notch. Some devices such as "pipe tabs" were used to reduce the stiffness of the system enough to allow the shear crack to continue to grow in an unstable manner. Four kinds of pipe materials were tested, and three of them with low ductility showed unstable ductile fracture. The fracture toughness for the onset of unstable fracture in these steels was evaluated and correlated successfully to upper shelf energy in the Charpy test.
Author: M. Ogasawara Publisher: ISBN: Category : Charpy shelf energy Languages : en Pages : 7
Book Description
A laboratory test for the unstable ductile fracture of mild steels was developed. A shear crack was initiated from a very deep notch. Some devices such as "pipe tabs" were used to reduce the stiffness of the system enough to allow the shear crack to continue to grow in an unstable manner. Four kinds of pipe materials were tested, and three of them with low ductility showed unstable ductile fracture. The fracture toughness for the onset of unstable fracture in these steels was evaluated and correlated successfully to upper shelf energy in the Charpy test.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
Ductile fracture in nuclear pressure vessel steel was characterized using a computer model of material damage. The model predicts crack initiation and growth and contains constants that are set by computer simulation of the following fracture tests: the simple tension test, the circumferentially notched round tension test, the blunt-notched compact tension test, and the Charpy V-notch test. The simulations provide the stress and strain states of these tests at fracture. The major goal of our characterization program is to determine the correlation between Charpy toughness and fracture toughness.
Author: National Symposium on Fracture Mechanics (8th : 1974 : Brown University) Publisher: ASTM International ISBN: Category : Languages : en Pages : 507
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
Objective is to determine the fracture toughness of A533B-1 steel by computer modeling Charpy V-notch tests. A computer model of ductile fracture was developed that predicts fracture initiation. The model contains a set of material-dependent parameters obtained by computer simulations of small specimen tests. The computer calculations give detailed stress and strain histories up to the time of fracture, which are used to determine the model parameter values. The calibrated fracture model, that correctly predicts fracture initiation (and initiation energy) in the Charpy specimen, may then be used to simulate tests of accepted fracture-toughness specimens and hence obtain fracture toughness. The model parameters were calibrated to predict fracture in four different test specimens: two different notched-tension specimens, a simple tension specimen, and a precracked compact-tension specimen. The model was then used in a computer simulation of the Charpy V-notch specimen to initiate and advance a flat fracture. Results were compared with interrupted Charpy tests. Calibration of the model for two additional heat treatments of A533B-1 steel is in progress.
Author: M. Ogasawara
Author: M. Ogasawara
Author: 
Author: 
Author: Tae Sung Oh
Author: American Society for Testing and Materials
Author: 
Author: National Symposium on Fracture Mechanics (8th : 1974 : Brown University)![Fundamental Study of Crack Initiation and Propagation. [Computer Model of Ductile Fracture]. PDF](https://books.google.com/books/content/images/frontcover/Uv8hnQAACAAJ?fife=w80-h100)
Author: 
Author: William Alan Van der Sluys
Author: Joseph Olaitan Titilayo Adewara