Springback evaluation by bending under tension tests in conditions of multiaxial stresses corresponding to deep drawing processes. Application to AISI 304 DDQ stainless steel sheet

Authors

  • V. Miguel Escuela de Ingenieros Industriales de Albacete; Universidad de Castilla-La Mancha - Instituto de Desarrollo Regional; Universidad de Castilla-La Mancha
  • J. Coello Escuela de Ingenieros Industriales de Albacete; Universidad de Castilla-La Mancha - Instituto de Desarrollo Regional; Universidad de Castilla-La Mancha
  • A. Martínez Instituto de Desarrollo Regional; Universidad de Castilla-La Mancha
  • A. Calatayud Escuela de Ingenieros Industriales de Albacete; Universidad de Castilla-La Mancha - Instituto de Desarrollo Regional; Universidad de Castilla-La Mancha

DOI:

https://doi.org/10.3989/revmetalm.1248

Keywords:

Springback, Bending under tension, AISI 304, Deep-drawing, Multiaxial

Abstract


In this paper, a methodology has been developed for evaluating the springback of AISI 304 DDQ stainless steel sheet based on a bending under tension test. The main difference of the methodology herein carried out is that tests are made under the multiaxial stresses state that take place in deep drawing processes. This affects to the level of stress value in the test and to the hardening state of the sheet. Springback evaluation has been done in two different areas. Bending area has been evaluated from elastic recovery ratio defined as the ratio between the bending radius after and before bending. Bending and unbending extreme has been studied from the measured curvature radius in this area and taking into account the geometric equivalence of the test with the drawing cups process. Results found allow to state that drawing ratio or deformation ratio have a negligible influence on the springback into the range of values experimented here. Bending radius has hardly influence as well while bending angle is the most significant variable. The results obtained are compared to those measured in deep-drawn cups, finding a great agreement.

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Published

2013-06-30

How to Cite

Miguel, V., Coello, J., Martínez, A., & Calatayud, A. (2013). Springback evaluation by bending under tension tests in conditions of multiaxial stresses corresponding to deep drawing processes. Application to AISI 304 DDQ stainless steel sheet. Revista De Metalurgia, 49(3), 165–177. https://doi.org/10.3989/revmetalm.1248

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