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1 Studia Geotechnica et Mechanica

1 2003

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A procedure for elastoplastic hardening function identification

Sikora Z., Ichikawa Y., Dziadziuszko P.

Studia Geotechnica et Mechanica

2003

Vol. 25, nr 1-2

121-131

The inverse analysis method for identifying a nonlinear hardening function, which governs a plastic yielding of soil and rock materials in the framework of the elastoplastic theory, is presented. A concept of two-stage finite element based on the spatial discretization of computational space and hardening function space is introduced. The proposed inverse analysis can be classified as the output least-squares method. The Levenberg-Marquard method is utilized for the minimization of the goal function at hand. A numerical example is given for the hardening function identification with the modified Drucker-Prager yield criterion in the case of a simple compression triaxial test.