Prediction of Central Burst Defects in Copper Wire Drawing Process

Journal Article · Mon Jan 17 00:00:00 EST 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3552500· OSTI ID:21510182

Vega, G ^[1]; Haddi, A ^[2]; Imad, A ^[1]

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1. Laboratoire de Mecanique de Lille, CNRS UMR 8107, Universite de Lille 1, Cite Scientifique, Avenue Paul Langevin, F-59655 Villeneuve d'Ascq (France)
2. Laboratoire Genie Civil et geo-Environnement (LGCgE), Faculte des Sciences Appliquees, Universite d'Artois, F-62400 Bethune (France)

In this study, the prediction of chevron cracks (central bursts) in copper wire drawing process is investigated using experimental and numerical approaches. The conditions of the chevron cracks creation along the wire axis depend on (i) the die angle, the friction coefficient between the die and the wire, (ii) the reduction in crosssectional area of the wire, (iii) the material properties and (iv) the drawing velocity or strain rate. Under various drawing conditions, a numerical simulation for the prediction of central burst defects is presented using an axisymmetric finite element model. This model is based on the application of the Cockcroft and Latham fracture criterion. This criterion was used as the damage value to estimate if and where defects will occur during the copper wire drawing. The critical damage value of the material is obtained from a uniaxial tensile test. The results show that the die angle and the reduction ratio have a significant effect on the stress distribution and the maximum damage value. The central bursts are expected to occur when the die angle and reduction ratio reach a critical value. Numerical predictions are compared with experimental observations.

• OSTI ID: 21510182
• Journal Information: AIP Conference Proceedings, Vol. 1315, Issue 1; Conference: AMPT2010: International conference on advances in materials and processing technologies, Paris (France), 24-27 Oct 2010; Other Information: DOI: 10.1063/1.3552500; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AXIAL SYMMETRY
COMPUTERIZED SIMULATION
COPPER
COPPER ALLOYS
CRACKS
DAMAGE
DEFECTS
DISTRIBUTION
DRAWING
FINITE ELEMENT METHOD
FORECASTING
FRACTURES
FRICTION
FRICTION FACTOR
STRAIN RATE
STRESSES
TENSILE PROPERTIES
VELOCITY
WIRES
ALLOYS
CALCULATION METHODS
DIMENSIONLESS NUMBERS
ELEMENTS
FABRICATION
FAILURES
MATERIALS WORKING
MATHEMATICAL SOLUTIONS
MECHANICAL PROPERTIES
METALS
NUMERICAL SOLUTION
SIMULATION
SYMMETRY
TRANSITION ELEMENT ALLOYS
TRANSITION ELEMENTS