Accuracy of Conventional Finite Element Models in Bulk-Forming of Micropins from Sheet Metal

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Kraus M, Hufnagel T, Merklein M
Zeitschrift: Journal of Micro and Nano-Manufacturing
Jahr der Veröffentlichung: 2019
Band: 7
Heftnummer: 1
ISSN: 2166-0468
eISSN: 2166-0476


Abstract

The ongoing miniaturization trend in combination with increasing production and functional volume leads to a rising demand for metallic microparts. Bulk forming of microparts from sheet metal provides the potential for mass production of those components by an extensive simplification of the handling. The advantage of a high production rate contrasts with the disadvantage of a low utilization of material. In this context, it is necessary to investigate suitable measures to increase the material utilization. To save cost intensive trial and error tests, numerical analysis could be an appropriate method for a basic process investigation. In this work, a validation with experimental results in the macro- and microscale was used to investigate the eligibility of the finite element method (FEM) for a basic process analysis. For a high transferability, the finite element (FE) models were validated for various tribological conditions and material states. The results reveal that there is a high agreement of the experimental and numerical results in the macroscale. In microscale, conventional FEM shows inaccuracies due to the negligence of size effects in the discretization of the process. This fact limits the application of conventional FE-programs. Furthermore, the results show that lubricated and dry formed blanks lead to the same friction force and process result in the microscale. In addition, the basic formability of the prestrengthened pins in further forming stages was experimentally demonstrated.


FAU-Autoren / FAU-Herausgeber

Hufnagel, Thomas
Lehrstuhl für Konstruktionstechnik
Kraus, Martin
Lehrstuhl für Fertigungstechnologie
Merklein, Marion Prof. Dr.-Ing.
Lehrstuhl für Fertigungstechnologie


Zitierweisen

APA:
Kraus, M., Hufnagel, T., & Merklein, M. (2019). Accuracy of Conventional Finite Element Models in Bulk-Forming of Micropins from Sheet Metal. Journal of Micro and Nano-Manufacturing, 7(1). https://dx.doi.org/10.1115/1.4042965

MLA:
Kraus, Martin, Thomas Hufnagel, and Marion Merklein. "Accuracy of Conventional Finite Element Models in Bulk-Forming of Micropins from Sheet Metal." Journal of Micro and Nano-Manufacturing 7.1 (2019).

BibTeX: 

Zuletzt aktualisiert 2019-13-05 um 13:38