Failure prediction in bulk metal forming process
An important concern in metal forming is whether the desired deformation can be accomplished without defects in the final product. Various ductile fracture criteria have been developed and experimentally verified for a limited number of cases of metal forming processes. These criteria are highly d...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Hindawi Publishing Corporation
2014
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/39182/ http://irep.iium.edu.my/39182/ http://irep.iium.edu.my/39182/ http://irep.iium.edu.my/39182/1/385065.pdf |
| Summary: | An important concern in metal forming is whether the desired deformation can be accomplished without defects in the final
product. Various ductile fracture criteria have been developed and experimentally verified for a limited number of cases of metal
forming processes. These criteria are highly dependent on the geometry of the workpiece and cannot be utilized for complicated
shapes without experimental verification.However, experimental work is a resource hungry process. This paper proposes the ability
of finite element analysis (FEA) software such as LS-DYNA to pinpoint the crack-like flaws in bulk metal forming products. Two
different approaches named as arbitrary Lagrangian-Eulerian (ALE) and smooth particle hydrodynamics (SPH) formulations were
adopted. The results of the simulations agree well with the experimental work and a comparison between the two formulations
has been carried out. Both approximation methods successfully predicted the flow of workpiece material (plastic deformation).
However ALE method was able to pinpoint the location of the flaws. |
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