Tuesday  |  Virtual Track 4  |  10:00 AM–10:12 AM

#11712, Toward Simultaneous Experimentation and Calibration of Complex Elasto-Plastic Models

In this work, the errors associated with the calibration of an elasto-plastic material model via finite element model updating (FEMU) were studied. First a finite element simulation of an Al-7079 cruciform specimen with added noise and nominal parameters was used as synthetic experimental data with which a second uncalibrated model was fit to. During the FEMU calibration, sensitivity of the in-use or “activated” parameters, e.g. parameters relating to plastic deformation for an element past the yield stress, was gathered for each element at each mechanical load step. In the present work, correlations between parameter sensitivity and the accuracy of the material model calibration were explored.

Sandia National Laboratories is a multimission laboratory managed and operated by National Technology and 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 contrast DE-NA0003525. This paper describes objective technical results and analysis. Any subjective views or opinions that might be expressed in the paper do not necessarily represent the views of the U.S. Department of Energy or the United States Government.

Samuel Fayad   University of Illinois Urbana-Champaign
Elizabeth Jones   Sandia National Laboratory
Philip Reu   Sandia National Laboratory
Daniel Seidl   Sandia National Laboratory
John Lambros   University of Illinois Urbana-Champaign