Numerical investigation of a friction test to determine the friction coefficients for the clinching process

Author:

Bielak Ch R1ORCID,Böhnke M1,Bobbert M1,Meschut G1

Affiliation:

1. Laboratory for Material and Joining Technology, University of Paderborn, Paderborn, Germany

Abstract

Clinching as a mechanical joining process has become established in many areas of car body. In order to predict relevant properties of clinched joints and to ensure the reliability of the process, it is numerically simulated during the product development process. The prediction accuracy of the simulated process depends on the implemented friction model. Therefore, a new method for determining friction coefficients in sheet metal materials was developed and tested. The aim of this study is the numerical investigation of this experimental method by means of FE simulation. The experimental setup is modelled in a 3D numerical simulation taking into account the process parameters varying in the experiment, such as geometric properties, contact pressure and contact velocity. Furthermore, the contact description of the model is calibrated via the experimentally determined friction coefficients according to clinch-relevant parameter space. It is shown that the assumptions made in the determination of the experimental data in preliminary work are valid. In addition, it is investigated to what extent the standard Coulomb friction model in the FEM can reproduce the results of the experimental method.

Funder

Deutsche Forschungsgemeinschaft

Publisher

SAGE Publications

Subject

Mechanical Engineering,General Materials Science

Reference15 articles.

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2. Klasfauseweh U. Beitrag zur Simulation nichtschneidender Durchsetzfügevorgänge. Forschungsbericht des LWF. Dissertation, 1994.

3. Recent development in finite element analysis of clinched joints

4. Analytical method to predict the pull-out strength of clinched connections

5. Numerical and experimental study of the multi-axial quasi-static strength of clinched connections

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