Application of Finite Element Method to Analyze the Influences of Process Parameters on the Cut Surface in Fine Blanking Processes by Using Clearance-Dependent Critical Fracture Criteria

The correct choice of process parameters is important in predicting the cut surface and obtaining a fully-fine sheared surface in the fine blanking process. The researchers used the value of the critical fracture criterion obtained by long duration experiments to predict the conditions of cut surfac...

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Bibliographic Details
Published inJournal of Manufacturing and Materials Processing Vol. 2; no. 2; p. 26
Main Authors Wai Myint, Phyo, Hagihara, Seiya, Tanaka, Toru, Taketomi, Shinya, Tadano, Yuichi
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.06.2018
Subjects
Axial stress
Crack initiation
Criteria
Ductile fracture
Experiments
Fine blanking
Finite element analysis
Finite element method
fracture criterion
Fracture mechanics
Heat treating
Mathematical analysis
Metal forming
Predictions
Process parameters
sheared surface
Studies
Japan
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Summary:The correct choice of process parameters is important in predicting the cut surface and obtaining a fully-fine sheared surface in the fine blanking process. The researchers used the value of the critical fracture criterion obtained by long duration experiments to predict the conditions of cut surfaces in the fine blanking process. In this study, the clearance-dependent critical ductile fracture criteria obtained by the Cockcroft-Latham and Oyane criteria were used to reduce the time and cost of experiments to obtain the value of the critical fracture criterion. The Finite Element Method (FEM) was applied to fine blanking processes to study the influences of process parameters such as the initial compression, the punch and die corner radii and the shape and size of the V-ring indenter on the length of the sheared surface. The effects of stress triaxiality and punch diameters on the cut surface produced by the fine blanking process are also discussed. The verified process parameters and tool geometry for obtaining a fully-fine sheared SPCC surface are described. The results showed that the accurate and stable prediction of ductile fracture initiation can be achieved using the Oyane criterion.
ISSN:2504-4494
2504-4494
DOI:10.3390/jmmp2020026