Results 201 to 210 of about 13,222 (265)
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Ductile Fracture of honeycombs
ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, 2000AbstractCrack growth initiation and subsequent resistance in a hexagonal honeycomb made out of ductile base material is investigated in a numerical study. The elasto‐plastic base material is characterized by its yield strain, failure strain and the ratio of ultimate strength to yield strength, assuming a bilinear stress‐strain relationship. Of the base
Schmidt, I., Fleck, N. A.
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Ductile Fracture Instability in Shear
Journal of Applied Mechanics, 1958Abstract It is postulated that fracture occurs in an elastic-plastic, nonwork-hardening material subject to pure shear when a critical shear strain is attained throughout a critical volume of material. This postulate is combined with the classical equations of plasticity to predict when cracking will initiate from a notch at nominal ...
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Probability of a ductile fracture
Physics Letters A, 1992Abstract The present paper studies ductile fracture by a random fractal and calculates the fracture probability q of a ductile fracture. The fracture probability q is sensitive to the number n (microvoid size) and the probability p of forming microvoids. There are two critical probabilities p c1 and p c2 . When p ⩾ p c 2 = 1-1/ n 2 ,
Hui Su, Zhenqi Yan
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Approximate calculation of fracture ductility and fracture toughness of ductile metals
Materials Science and Engineering: A, 1989Abstract In this paper, the effect of stress states on the fracture ductility and fracture toughness of ductile metals is investigated. A relationship between the fracture ductility and stress triaxiality is derived from a modified damage criterion and is experimentally verified by using circumferentially notched tension specimens, from which an ...
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2013
Abstract Ductile fracture results from the application of an excessive stress to a metal that has the ability to deform permanently, or plastically, prior to fracture. Careful examination and knowledge of the metal, its thermal history, and its hardness are important in determining the correct nature of the fracture features.
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Abstract Ductile fracture results from the application of an excessive stress to a metal that has the ability to deform permanently, or plastically, prior to fracture. Careful examination and knowledge of the metal, its thermal history, and its hardness are important in determining the correct nature of the fracture features.
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2009
Introduction Throughout history, there has been a never-ending effort to develop materials with higher yield strengths. However, a higher yield strengths is generally accompanied by a lower ductility and a lower toughness. Toughness is the energy absorbed in fracturing.
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Introduction Throughout history, there has been a never-ending effort to develop materials with higher yield strengths. However, a higher yield strengths is generally accompanied by a lower ductility and a lower toughness. Toughness is the energy absorbed in fracturing.
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2D and 3D Visualization of Ductile Fracture
Advanced Engineering Materials, 2006New model materials made of laser drilled copper sheets have been fabricated to study the ductile fracture process. In‐situ tensile tests in a scanning electron microscope and in an X‐Ray computed tomography set‐up allows us to observe the void growth and coalescence in 2D and 3D.
Weck, A. +3 more
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International Journal of Damage Mechanics, 2019
The key point in this paper is the prediction of the onset of ductile fracture with a newly proposed ductile fracture criterion in various stress state ranging from shear to uniaxial tension. A series of tension tests with different material orientations are carried out up to fracture.
Saijun Zhang +4 more
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The key point in this paper is the prediction of the onset of ductile fracture with a newly proposed ductile fracture criterion in various stress state ranging from shear to uniaxial tension. A series of tension tests with different material orientations are carried out up to fracture.
Saijun Zhang +4 more
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Philosophical Magazine, 1959
Abstract Cup-and-cone fracture in single-phase ductile metals appears to originate at holes formed by drawing away of material from non-metallic inclusions, as suggested by Tipper. In copper, the holes expand under the triaxial stresses in the neck and coalesce in a macroscopic fissure; in α iron fine cracks are formed by the stress concentrated at the
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Abstract Cup-and-cone fracture in single-phase ductile metals appears to originate at holes formed by drawing away of material from non-metallic inclusions, as suggested by Tipper. In copper, the holes expand under the triaxial stresses in the neck and coalesce in a macroscopic fissure; in α iron fine cracks are formed by the stress concentrated at the
openaire +1 more source