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Efficient identification of material parameters based on experiments providing full-field kinematics
Performing predictive and accurate simulations of anisotropic, nonlinear materials requires not only to construct an appropriate constitutive model describing the mechanical behavior, but also to devise a methodology which enables a quantitative identification of the material parameters. Nowadays, full-field measurements of displacements and strains are considered as effective tool for material characterization. In the scope of this work, first, the material model is reformulated such that the parameters appear linear in the constitutive equations. Second, the full-field kinematics are directly inserted into the discretized equilibrium equation. This enables the definition of a quadratic objective function in terms of differences of discrete internal and external forces. Third, one single inhomogeneous experimental setup is designed to excite all deformation modes in the material model.
Efficient identification of material parameters based on experiments providing full-field kinematics
Performing predictive and accurate simulations of anisotropic, nonlinear materials requires not only to construct an appropriate constitutive model describing the mechanical behavior, but also to devise a methodology which enables a quantitative identification of the material parameters. Nowadays, full-field measurements of displacements and strains are considered as effective tool for material characterization. In the scope of this work, first, the material model is reformulated such that the parameters appear linear in the constitutive equations. Second, the full-field kinematics are directly inserted into the discretized equilibrium equation. This enables the definition of a quadratic objective function in terms of differences of discrete internal and external forces. Third, one single inhomogeneous experimental setup is designed to excite all deformation modes in the material model.
Efficient identification of material parameters based on experiments providing full-field kinematics
Makhool, Lubna (M. A.) (author) / Balzani, Daniel (Prof. Dr.-Ing. habil.) (author)
2021-01-25
Article (Journal)
Electronic Resource
English
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