Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

A simulation-based approach to predict of the springback behavior of ultra-high strength spring strips

Ein simulationsbasierter Ansatz zur Vorhersage des Rückfederungsverhaltens federharter Bänder
: Richter, Karsten; Reuther, Franz; Müller, Roland


Kawalla, R.:
Simulation-Based Technology Development for Material Forming : MEFORM 2019, March 20th to 21st, 2019, Freiberg
Durnten-Zurich: TTP, 2019 (Materials Science Forum 949)
ISBN: 978-3-0357-1495-1 (Print)
ISBN: 978-3-0357-2495-0
ISBN: 978-3-0357-3495-9
Metal Forming Conference (MEFORM) <27, 2019, Freiberg>
Conference Paper
Fraunhofer IWU ()
spring strip; bending; stamping-bending technology; springback prediction; FEA; strain dependent Young’s modulus

One effect of high influence on the dimensional accuracy during bending is springback. It inevitably occurs due to the elastic proportion in the material behavior. The impact is notably high when producing springs made of ultra-high strength spring strips of the steel grade 1.4310 (X10CrNi18-8). The high yield ratio needed to fulfil the functionalities required during application leads to dimensional inaccuracies that have to be compensated during the production process. This paper reports a simulation-based approach to predict the springback behaviour of ultra-high strength spring strips with tensile strengths TS = 1500-1800 MPa. Based on the results of advanced material testing and modelling, the numerical prediction of the springback behavior of an exemplary bending process (free bending) has been investigated in detail. This helps to obtain deeper knowledge and understanding of the springback phenomenon and to achieve suitable strategies for a more efficient industrial tool and process design while processing ultra-high strength spring strips.