WIT Press


Identification Of Material Parameters Of Inelastic Constitutive Laws From Displacement Fields

Price

Free (open access)

Paper DOI

10.2495/DF040021

Volume

47

Pages

11

Published

2004

Size

375 kb

Author(s)

M. Springmann & M. Kuna

Abstract

In this work a non-linear optimization method is presented to identify material parameters of the GURSON–TVERGAARD–NEEDLEMAN damage model from inhomogeneous displacement fields. The ductile damage model is implemented into the finite element code SPC-PMHP for parallel computers. Thematerial parameters are identified by comparison of the measured and calculated displacement fields. For determining the material parameters, the solution of the direct problem is embedded in a gradient based method. Deterministic optimization procedures are used to determine parameters by means of a least-squares functional. A semianalytical sensitivity analysis is applied to calculate the gradient of the objective function. Numerical experiments with synthetically generated displacement fields were carried out to

Keywords