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Forming and fracture limits of aluminium alloy
Materials Science and Technology, 2011Forming and fracture limits of an AA 3104-H19 aluminium alloy sheet were studied by hydraulic bulging and Marciniak type deep drawing and tensile tests. The alloy appeared to be highly anisotropic, exhibiting distinctly different fracture patterns in the rolling and transverse directions.
Heikinheimo, Erkki, Korhonen, Antti
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Characterizing fracture forming limit and shear fracture forming limit for sheet metals
Journal of Materials Processing Technology, 2018Abstract This article investigates, experimentally, the failure loci in transition region between failure by crack-opening by mode I and by mode II of fracture mechanics. This investigation determines the fracture forming limit (FFL) and the shear fracture forming limit (SFFL) for copper with 0.8 mm and brass with 1 mm of thickness, by means of ...
Kishore Jawale +3 more
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Stress-Based Forming Limits in Sheet Metal Forming
Manufacturing Engineering, 2000Abstract A strain-based forming limit criterion is widely used throughout the sheet metal forming industry to gauge the stability of the deformed material with respect to the development of a localized neck prior to fracture. This criterion is strictly valid only when the strain path is linear throughout the deformation process. There is
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J. Inf. Process. Cybern., 1994
Summary: In ibid. 24, No. 6, 267-285 (1988; Zbl 0661.68069), \(k\)-limited E(T)0L systems are introduced and investigated by \textit{D. Wätjen}. In this paper we now introduce the notion of ``\(k\)lE(T)0L forms'' and their ``interpretations'' to consider families of structurally similar \(k\)-limited E(T)0L systems. Furthermore, a normal form for \(k\)-
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Summary: In ibid. 24, No. 6, 267-285 (1988; Zbl 0661.68069), \(k\)-limited E(T)0L systems are introduced and investigated by \textit{D. Wätjen}. In this paper we now introduce the notion of ``\(k\)lE(T)0L forms'' and their ``interpretations'' to consider families of structurally similar \(k\)-limited E(T)0L systems. Furthermore, a normal form for \(k\)-
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2011
In a deforming sheet, the strain state is defined as the ratio between minor strain and major strain. The formability depends on this strain state and can be expressed as the so-called forming limit curve (FLC). In complex strain states the deformation is limited by an instability just as in a tensile test. In cases of negative minor strain this can be
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In a deforming sheet, the strain state is defined as the ratio between minor strain and major strain. The formability depends on this strain state and can be expressed as the so-called forming limit curve (FLC). In complex strain states the deformation is limited by an instability just as in a tensile test. In cases of negative minor strain this can be
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Limiting similarity and the form of the competition coefficient
Theoretical Population Biology, 1975The question of whether there is a limit to the similarity of competing species has previously been investigated by a number of authors. These studies have all used the Lotka-Volterra model of competition, and have assumed that the competition coefficient olij may be calculated using the expression, oiij = J” U,(R) U,(R) W/s (U,(R))* dR. In this paper,
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2004
In this work, the Marciniak and Kuczynski model (MK) will be reviewed and will be generalized to a more general approach for the calculation of forming limit diagrams. In the new model we will account for all directions of the imperfection. This new approach has been used to calculate the theoretical FLDs (forming limit diagrams) for Vonmises, Barlat ...
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In this work, the Marciniak and Kuczynski model (MK) will be reviewed and will be generalized to a more general approach for the calculation of forming limit diagrams. In the new model we will account for all directions of the imperfection. This new approach has been used to calculate the theoretical FLDs (forming limit diagrams) for Vonmises, Barlat ...
openaire +1 more source
International Journal of Advanced Manufacturing Technology, 2021
Chunjian Su, Yuting Lv, Shumei Lou
exaly
Chunjian Su, Yuting Lv, Shumei Lou
exaly