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Predicting ductile tearing of additively manufactured 316L stainless steel

  • Sandia Fracture Challenge 2017
  • Published:
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Abstract

Predictions for ductile tearing of an additively-manufactured 316L metal structure were generated using a unified creep plasticity damage (UCPD) model and finite element models constructed using 4-node tetrahedral or 8-node hexahedral elements. Uniaxial tension and notched tension experiments were simulated to obtain material parameters for the UCPD model. Results from these simulations revealed that accurate prediction of material bifurcations prior to the initiation of ductile tears are critically important for generating accurate ductile tearing predictions. This occurs because material bifurcations lead to deformation localization which is followed by ductile tearing. Crack path predictions were found to be sensitive to the finite element mesh with cracks preferring to run along mesh lines. Finally, the unloading slope of the load displacement curve was found to be sensitive to element failure modeling.

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Acknowledgements

I am grateful for the opportunity to participate in the third Sandia Fracture Challenge and would like to thank Drs. S. Kramer and B. Boyce for their work and for inviting me to participate. Reviews of this paper by Dr. Bill Scherzinger and Dr. Neal Hubbard, Sandia National Laboratories, and external reviewers significantly contributed to the quality of this paper. Sandia National Laboratories is a multimission laboratory managed and operated by National Technology & Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525. The views expressed in the article do not necessarily represent the views of the U.S. Department of Energy or the United States Government.

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  1. Sandia National Laboratories, Albuquerque, NM, USA

    Michael K. Neilsen

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  1. Michael K. Neilsen
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Correspondence to Michael K. Neilsen.

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Neilsen, M.K. Predicting ductile tearing of additively manufactured 316L stainless steel. Int J Fract 218, 195–207 (2019). https://doi.org/10.1007/s10704-019-00367-9

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  • DOI: https://doi.org/10.1007/s10704-019-00367-9

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