Optimization as a Tool for the Inverse Identification of Parameters of Nonlinear Material Models

Optimization as a Tool for the Inverse Identification of Parameters of Nonlinear Material Models

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At present, optimization methods are finding application in many technical as well as nontechnical fields. One of the possible applications of optimization procedures is in the identification of formerly unknown parameters of nonlinear constitutive relationships of construction materials which are used in numerical simulations of the behaviour of built structures. In this respect, optimization constitutes a certain counterweight to other soft-computing methods which also include methods of identification based on the exercise of artificial neural networks. The topic of the following contribution is the description of the possible connection of a computational system based on the finite element method with an optimization tool, and an analysis of the identification of the mechanico-physical and fracture mechanical parameters of a material model for concrete based on the Willam-Warnke yield surface from an experimentally-measured loading curve. The individual steps of this inverse identification process are described in individual paragraphs, including a description of the model used, all with the aim of creating a comprehensive procedure which can be utilized in further research or in the practical design of efficient built structures.

At present, optimization methods are finding application in many technical as well as nontechnical fields. One of the possible applications of optimization procedures is in the identification of formerly unknown parameters of nonlinear constitutive relationships of construction materials which are used in numerical simulations of the behaviour of built structures. In this respect, optimization constitutes a certain counterweight to other soft-computing methods which also include methods of identification based on the exercise of artificial neural networks. The topic of the following contribution is the description of the possible connection of a computational system based on the finite element method with an optimization tool, and an analysis of the identification of the mechanico-physical and fracture mechanical parameters of a material model for concrete based on the Willam-Warnke yield surface from an experimentally-measured loading curve. The individual steps of this inverse identification process are described in individual paragraphs, including a description of the model used, all with the aim of creating a comprehensive procedure which can be utilized in further research or in the practical design of efficient built structures.

FEA, nonlinear material model, inverse identification, optimization, concrete, ANSYS

FEA, nonlinear material model, inverse identification, optimization, concrete, ANSYS

HOKEŠ, F.; KALA, J.; KRŇÁVEK, O.

2016

07.11.2015

Roma. Italy

978-1-61804-346-7

Proceedings of the 9th International Conference on Continuum Mechanics (CM '15)

50

55

6