Modelling failure of joining zones during forming of hybrid parts

Modelling failure of joining zones during forming of hybrid parts

WESTER Hendrik, STOCKBURGER Eugen, PEDDINGHAUS Simon, UHE Johanna, BEHRENS Bernd-Arno

Abstract. Combining diverse materials enables the use of the positive properties of the individual material in one component. Hybrid material combinations therefore offer great potential for meeting the increasing demand on highly loaded components. The use of hybrid pre-joined semi-finished products simplifies joining processes through the use of simple geometries. However, the use of pre-joined hybrid semi-finished products also results in new challenges for the following process chain. For example, the materials steel and aluminium may form brittle intermetallic phases in the joining zone, which can be damaged in the following forming process under the effect of thermo-mechanical loads and thus lead to a weak point in the final part. Due to their small thickness as well as their position in the component, the analysis of the joining zone is only possible by complex destructive testing methods. FE simulation therefore offers an efficient way to analyse the development of damage in the process design and to reduce damage by process modifications. Therefore, within this study a damage model based on cohesive zone elements is implemented in the FE software MSC Marc 2018 and calibrated using experimental local tensile tests performed under process relevant conditions.

Keywords
Pre-Joined Hybrid Semi-Finished Parts, Numerical Modelling, Cohesive Zones, Local Tensile Tests

Published online 4/19/2023, 10 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: WESTER Hendrik, STOCKBURGER Eugen, PEDDINGHAUS Simon, UHE Johanna, BEHRENS Bernd-Arno, Modelling failure of joining zones during forming of hybrid parts, Materials Research Proceedings, Vol. 28, pp 717-726, 2023

DOI: https://doi.org/10.21741/9781644902479-78

The article was published as article 78 of the book Material Forming

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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