Investigation of Friction Coefficient at Stack Compression Tests

Abstract:

During sheet metal forming (for example, deep drawing), the desired geometry is typically produced under large plastic deformations. However, in order to characterize the material behavior in this deformation range as accurately as possible, experimental investigation of the material is indispensable. Such investigations are necessary, among other reasons, to determine material properties that may later serve as input parameters for finite element (FEM) simulations. By defining appropriate material properties, the design and optimization of the forming technology become more efficient. One such property is the material’s flow curve; for determining it in the large deformation range, a particularly promising method is the stack compression test (SCT). At the same time, the method also has certain drawbacks. One is that the test is not standardized, and therefore there is no exact methodology for its execution. Another difficulty arises from the fact that the friction conditions present during the test are not clearly defined. In this paper, we seek to determine whether the friction conditions in the case of the SCT can be inferred by a comparative analysis of experimental force–displacement curves and force–displacement curves obtained from FEM simulations.

• Periodical: Solid State Phenomena (Volume 390)
• Pages: 173-180
• DOI: https://doi.org/10.4028/p-aiq9fM
• Online since: April 2026
• Authors: Martin László Kölüs*, Imre Nagy-Gombai, Gábor Kalácska, Gábor Jozsef Beres
• Keywords: Finite Element Method, Friction, Stack Compression Test

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