Results 251 to 260 of about 3,600 (293)

Criterion of Ductile Fracture for GCr15 Bearing Steel

Applied Mechanics and Materials, 2013
Ductile fracture is one of the defects in metal plastic forming. For predicting and preventing fracture occurs, a criterion describing the fracture accurately is necessary, especially in the case of numerical simulation. Three criterions, i.e. Cockcroft-Latham, McClintock, Rice & Tracey, were compared experimentally to decide the suitable one for ...
Yong Ping Yu, Qiu He Yang
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A fractal criterion for ductile and brittle fracture

Journal of Applied Physics, 1994
A universal relationship between roughness and toughness of fractures is proposed and a new criterion to define brittle and ductile fracture is derived from the Griffith energy balance concept and fractal geometry.
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Experimental study of the T-criterion in ductile fractures

Engineering Fracture Mechanics, 1983
Abstract In the present paper, the newly introduced T -criterion was applied in the case of the fracture of a ductile material. Polycarbonate of Bisphenol A (PCBA) specimens containing slant internal cracks were tested and the experimentally obtained angles of crack propagation, as well as the respective fracture loads were compared to corresponding
P.S Theocaris, G.A Kardomateas, N.P Andrianopoulos   +2 more
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An improvement of CTOD criterion for ductile fracture

Engineering Fracture Mechanics, 1992
Abstract In this paper a relationship between the critical crack tip opening displacement (CTOD) at crack initiation δ ti and the stress triaxiality σ m / \ gs is derived based on the damage mechanics criterion for ductile fracture, and a modified crack tip parameter δ ti ∗ and a modified CTOD criterion are ...
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A new damage mechanics criterion for ductile fracture

Engineering Fracture Mechanics, 1987
Abstract In this paper, a new damage mechanics parameter V D is proposed, which is valid for characterizing ductile fracture, and a damage mechanics criterion is established based on a continuum damage mechanics model. The new material parameter of ductile fracture V Dc with an obvious microscopic physical meaning, which can be ...
null Wei Hua Tai, null Bing Xian Yang
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Unified CDM model and local criterion for ductile fracture—II. Ductile fracture local criterion based on the CDM model

Engineering Fracture Mechanics, 1992
Abstract A unified local criterion for ductile fracture is proposed on the basis of the continuum damage mechanics (CDM) model given by the author in Part I [Engng Fracture Mech. (submitted)], in which the stress, strain and damage history are included.
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Identification of ductile fracture criterion on basis of experimental data

Canadian Metallurgical Quarterly, 2014
Development of a new fracture criterion in metal forming was the general objective of the paper. The emphasis was put on accounting for temperature and strain rate in a proposed criterion. Compression tests and strain induced crack opening (SICO) tests for the Inconel alloy were performed and applied for identification and validation of fracture ...
L. Trębacz, M. Pietrzyk
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A fracture criterion for fracture simulation of ductile metals based on micro-mechanisms

Theoretical and Applied Fracture Mechanics, 2018
Abstract A correct representation of the fracture limit for material subject to various stress states is essential for the accurate prediction of fracture behavior. In this paper, a comprehensive fracture criterion for ductile metals is developed. The proposed criterion is composed of two competing and correlated sub-criterions corresponding to the ...
Shen Yan, Xianzhong Zhao
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A ductile fracture criterion in sheet metal forming process

Journal of Materials Processing Technology, 2003
Abstract Forming limit curves at neck (FLCN) and forming limit curves at fracture (FLCF) for various steel sheets were determined from a hemispherical punch stretching. The measured FLCF of the sheets with higher ductility limit had approximately linear shape like one of the bulk forming process.
Heung Nam Han, Keun-Hwan Kim
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Ductile Rupture Blunt-Notch Fracture Criterion

1977
A blunt-notch fracture criterion is proposed. The criterion is shown to be applicable for the initiation of ductile tearing in the plane-strain regime. Elastic to fully plastic behavior can be treated. Experiments have shown ductile crack initiation to occur at a J-integral value which is only a function of notch root radius.
JA Begley, WA Logsdon, JD Landes
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