|About this Abstract
||NUMISHEET 2022: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
||Influence of Kinematic Hardening on Clinch Joining of Dual-phase Steel HCT590X Sheet Metal
||Johannes Friedlein, Julia Mergheim, Paul Steinmann
|On-Site Speaker (Planned)
Nowadays, clinching is a widely used joining technique, where sheets are joined by pure deformation to create an interlock without the need for auxiliary parts. This leads to advantages such as reduced joining time and manufacturing costs. On the other hand, the joint strength solely relies on directed material deformation, which renders an accurate material modelling essential to reliably predict the joint forming. The latter, as typical of many metal forming applications, locally involves large plastic strains and possibly complex non-proportional loading paths. Consequently, a finite plasticity formulation is utilised incorporating a Chaboche-Rousellier kinematic hardening law to capture the Bauschinger effect. Material parameters for the latter are identified from tension-compression tests on miniature specimens for DP600 and EN AW-6014. The resulting material model is implemented in LS-Dyna to study the locally diverse loading paths and give a quantitative statement on the importance of kinematic hardening for clinching.
||Definite: At-meeting proceedings