Abstract
The use of lightweight materials offers substantial strength and weight advantages in car body design. For characterization of capability of sheet material dedicated to deep drawing processes in the automotive industry, mainly Forming Limit Diagrams (FLD) are used. However, investigations conducted at the Institute for Metal Forming Technology using new specimen geometries have shown that formability of High Strength Steel Sheet Material changes by superposing shearing on in-plane tension loads. Hence, these mixed stress and strain conditions including shearing effects can occur in deep-drawing processes of complex car body parts. But these changes in materials formability nowadays cannot be described sufficiently by using conventional FLC-criterion. Considering such aspects in defining suitable failure criterions a new semi-empirical model has been developed considering the effect of shearing in sheet metals formability. This novel model is capable to separate shear and in-plane tension loads by using a special strain definition. For experimental calibration of so called Shear Forming Limit Curve (SFLC) several standardized and enhanced material testing procedures with novel specimen geometries are necessary. In this contribution firstly the need of enhanced material description and additionally the theory SFLCModel is presented. For experimentally calibration required input parameters are determined by special specimen geometries.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.