Finite element analysis of optimum clearance in the blanking process

Faura, F.; Garcı́a, A.; Amestoy, Manuel Estrems

doi:10.1016/s0924-0136(98)00181-2

Cited by 66 publications

(27 citation statements)

References 4 publications

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“…This approach postulates that a crack initiation occurs at the point of the sheet whose effective strain first reaches the fracture strain of the work material [4]. The program uses element deletion method to iterate the meshing procedure and deletes an element when the critical values are satisfied.…”

Section: Finite Element Modelmentioning

confidence: 99%

“…In previous researches [4,15], it was suggested that the ideal clearance is between 10% and 12% for AISI 304 and t = 1 mm. They also claimed that real crack propagation angle (β) remains nearly constant for all clearance values and only ideal crack propagation angle (θ) changes.…”

Section: Crack Propagation Anglesmentioning

confidence: 99%

“…In order to improve this gap, new approaches have been developed. Faura et al [4], tried to determine optimum clearance by presenting crack propagation angles throughout the sheared edge. Hambli et al, studied the same concept and also integrated neural networks to predict burr heights and to optimize the blanking process [5][6][7].…”

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confidence: 99%

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Investigation of the Process Parameters on the Blanking of AISI 304 Stainless Steel by Using Finite Element Method

Engin¹,

Eyerci̇oğlu²

2016

JMEA

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Blanking is a major process and has a wide range of usage in manufacturing industry. The general concept of blanking seems a simple one but governing parameters are many and have a complex relationship which directly affect the quality of the produced parts (blanks) and also the energy efficiency of the process. The main problem is the lack of prediction capabilities of the effect of these parameters that lead to time, money and labor consuming trial and error procedures in experimental studies. Usage of FEM based programs to simulate blanking to obtain numerical results and observe the shearing mechanism is a cheap and a detailed way for industrial applications. In this study five different clearances (1%, 3%, 5%, 10% and 20%) and three different thicknesses (t = 2 mm, t = 3 mm and t = 4 mm) were used for simulation and experimental studies of the blanking process. Simulations were executed by using the FEM program, Deform 2-D. Investigations were made on the parameters related to crack progression like crack initiation and crack propagation angles, indentation angle, rollover angle and depth and also the related blanking energy values. The results of the present paper are in agreement with the results of experimental studies.

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Section: Finite Element Modelmentioning

confidence: 99%

Section: Crack Propagation Anglesmentioning

confidence: 99%

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Investigation of the Process Parameters on the Blanking of AISI 304 Stainless Steel by Using Finite Element Method

Engin¹,

Eyerci̇oğlu²

2016

JMEA

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“…This is mainly due to the fact that the blanking process is principally too complex for an analytical treatment. Finite element modelling appears to provide an appropriate tool to model complex processes, like the blanking process (Brokken, 1995;Brokken et al, 1996;Jeong et al, 1996;Post & Voncken, 1996;Taupin et al, 1996;Brokken et al, 1997Brokken et al, , 1998Faura et al, 1998;Klocke & Sweeney, 1998;Samuel, 1998;Brokken, 1999). However, one major difficulty in this numerical approach is the description of ductile fracture initiation, which is essential for a quantitatively correct prediction of the blanked edge.…”

Section: The Blanking Processmentioning

confidence: 99%

“…This assumption reflects the concept in damage mechanics that damage cannot decrease. The Cockroft & Latham criterion has already been used for the blanking process by several authors (Jeong et al, 1996;Klocke & Sweeney, 1998;Faura et al, 1998). Unfortunately, they either did not confront their simulations with experiments or did not show good agreement over a range of different geometries.…”

Section: Application Of Ductile Fracture Modelsmentioning

confidence: 99%

Prediction of Ductile Fracture in Metal Blanking

Goijaerts

Govaert

Baaijens

1999

Journal of Manufacturing Science and Engineering

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This study is focused on the description of ductile fracture initiation, which is needed to predict product shapes in the blanking process. Two approaches are elaborated using a local ductile fracture model. According to literature, characterization of such a model should take place under loading conditions, comparable to the application. Therefore, the first approach incorporates the characterization of a ductile fracture model in a blanking experiment. The second approach is more favorable for industry. In this approach a tensile test is used to characterize the fracture model, instead of a complex and elaborate blanking experiment. Finite element simulations and blanking experiments are performed for five different clearances to validate both approaches. In conclusion it can be stated that for the investigated material, the first approach gives very good results within the experimental error. The second approach, the more favorable one for industry, yields results within 6 percent of the experiments over a wide, industrial range of clearances, when a newly proposed criterion is used. [S1087-1357(00)02202-4]

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