The establishment of a failure criterion in cross wedge rolling

Internal defects in the cross wedge rolling (CWR) process can lead to the catastrophic failure of products. Using specialised experiments and the explicit dynamic finite element model (FEM), this work investigates the mechanisms of void generation and growth in the cross wedge rolling process. Based...

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Bibliographic Details
Published in:International journal of advanced manufacturing technology 2004-08, Vol.24 (3-4), p.180-189
Main Authors: Li, Qiang, Lovell, MichaelR
Format: Article
Language:English
Subjects:
Catastrophic events
Deformation mechanisms
Finite element method
Morphology
Tooling
Wedges
Workpieces
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Summary:Internal defects in the cross wedge rolling (CWR) process can lead to the catastrophic failure of products. Using specialised experiments and the explicit dynamic finite element model (FEM), this work investigates the mechanisms of void generation and growth in the cross wedge rolling process. Based on a combined numerical and experimental approach, the morphology of void generation is determined as a function of the workpiece material and three primary parameters in the cross wedge rolling process: the forming angle, α, the stretching angle, β and the area reduction, ΔA. Through the definition of a non-dimensional deformation coefficient, ε, a method for predicting the likelihood of void formation is subsequently ascertained and discussed with respect to CWR tooling design and operating conditions.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-003-1607-0