Material fracture and burr formation in blanking results of FEM simulations and comparison with experiments

Taupin, Etienne; Breitling, Jochen; Wu, Wei‐Tsu; Altan, Taylan

doi:10.1016/0924-0136(96)02288-1

Cited by 163 publications

(86 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Furthermore, special care has to be taken to avoid problems concerning mesh dependence and energy dissipation with classical local continuum damage models. Another strategy presented in literature is element elimination or erosion, as used by Jeong et al [5] and Taupin et al [6], both employing rigid plastic material models with particular failure criteria. Although the element elimination procedure is a simple, very effective method to model failure, it is inherently mesh dependent.…”

Section: Introductionmentioning

confidence: 99%

Predicting the shape of blanked products: a finite element approach

Brokken

Brekelmans

Baaijens

2000

Journal of Materials Processing Technology

View full text Add to dashboard Cite

Prediction of the properties of products of the blanking process is nowadays still mainly an empirical effort. The lack of fundamental knowledge of the process may cause lengthy process development, and obstructs process innovation. Consequently, a validated numerical model of the process would be of great value.In this paper, an elasto-plastic ®nite element model will be introduced, in which the extremely large deformations which occur are handled by an operator split arbitrary Lagrange±Euler method combined with remeshing. Ductile fracture is incorporated by a discrete crack approach. To demonstrate the possibilities of the procedure, some simulation results are presented. # 2000 Elsevier Science S.A. All rights reserved.

show abstract

Section: Introductionmentioning

confidence: 99%

Predicting the shape of blanked products: a finite element approach

Brokken

Brekelmans

Baaijens

2000

Journal of Materials Processing Technology

View full text Add to dashboard Cite

show abstract

“…Material ductility is the main material parameter characterizing crack initiation and propagation mechanisms within the sheet metal during blanking [13,14,15,16]. Therefore, this factor has been retained as the main design parameter for optimum clearance prediction.…”

Section: Optimum Clearance Algorithmmentioning

confidence: 99%

Prediction of optimum clearance in sheet metal blanking processes

Hambli¹,

Richir²,

Crubleau³

et al. 2003

The International Journal of Advanced Manufacturing Technology

View full text Add to dashboard Cite

The blanking process and structure of the blanked surface are influenced by both the tooling (clearance and tool geometry) and properties of the workpiece material (blank thickness, mechanical properties, microstructure, etc.). Therefore, for a given material, the clearance and tool geometry are the most important parameters. The objective of the present work is to develop a methodology to obtain the optimum punch-die clearance for a given sheet material by simulation of the blanking process. A damage model of the Lemaitre type is used in order to describe crack initiation and propagation into the sheet. A comparative study between numerical and experimental results shows good agreement.

show abstract

“…Kondo and Suzuki [4] discussed in detail two fine blanking processes, fine blank and opposed dies, which analysed the dishing amount, the variance of sheet thickness and the profile evenness of the sheared surface of the two processes. In addition, a number of researchers have constructed a simulation model of the metal sheet shearing process by finite element methods [5,6,7,8,9,10]. By using the developed model, one may infer the crack start position and the plastic deformation zone of the sheared surface, the influences of punch geometry on the shearing process and the final profile of the sheared products.…”

Section: Introductionmentioning

confidence: 99%

Tool wear investigation on the precision progressive die for the IC dam-bar cutting process

Lin

Chang

2003

The International Journal of Advanced Manufacturing Technology

View full text Add to dashboard Cite

The IC dam-bar cutting process is conducted with the precision progressive shearing die, while the cutting quality of the sheared product is subject to the wear status of the punch. The main objective of this study was to explore the relationship between the burnished band of the sheared surface and the wear of the shearing punch in the thin sheet cutting process. Firstly, the Taguchi method was applied to scheme the dam-bar cutting experiments. Two different HSS punches, ASP60 and SKH9, were used to punch the simulated leads made of the phosphor bronze C5191R-H. The variance analysis and confirmation experiments were also executed to verify the analytical results. The experimental data was collected to establish the punch wear estimated model. Secondly, a concept of an equivalent wear length of the punch flank was introduced to examine the wear of the punch flank, and the gravimetric wear rate was also calculated to examine the amount of the punch wear due to weight loss. Finally, the estimated model of the gravimetric wear rate through the burnished area of the dam-bar sheared surface was constructed. One can directly determine the status of the cutting punch depending on the size of the burnished band, as a basis for tool changing or regrinding. of the punch was able to be derived through the Int

show abstract

Material fracture and burr formation in blanking results of FEM simulations and comparison with experiments

Cited by 163 publications

References 2 publications

Predicting the shape of blanked products: a finite element approach

Predicting the shape of blanked products: a finite element approach

Prediction of optimum clearance in sheet metal blanking processes

Tool wear investigation on the precision progressive die for the IC dam-bar cutting process

Contact Info

Product

Resources

About