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This work presents a Finite Element Model Updating inverse methodology for reconstructing heterogeneous materialdistributions based on an efficient isogeometric shell formulation. It uses nonlinear hyperelastic material models suitable fordescribing incompressible material behavior as well as initially curved shells. The material distribution is discretized by bilinearelements such that the nodal values are the design variables to be identified. Independent FE analysis and material discretization,as well as flexible incorporation of experimental data, offer high robustness and control. Three elementary test cases and oneapplication example, which exhibit large deformations and different challenges, are considered: uniaxial tension, pure bending,sheet inflation, and abdominal wall pressurization. Experiment-like results are generated from high-resolution simulations withthe subsequent addition of up to 4% noise. Local optimization based on the trust-region approach is used. The results showthat with a sufficient number of experimental measurements, design variables and analysis elements, the algorithm is capableto reconstruct material distributions with high precision even in the presence of large noise. The proposed formulation isvery general, facilitating its extension to other material models, optimization algorithms and meshing approaches. Adaptedmaterial discretizations allow for an efficient and accurate reconstruction of material discontinuities by avoiding overfitting dueto superfluous design variables. For increased computational efficiency, the analytical sensitivities and Jacobians are provided.
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- Wersja publikacji
- Accepted albo Published Version
- DOI:
- Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1016/j.cma.2021.114442
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- Kategoria:
- Publikacja w czasopiśmie
- Typ:
- artykuły w czasopismach
- Opublikowano w:
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COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
nr 390,
ISSN: 0045-7825 - Język:
- angielski
- Rok wydania:
- 2022
- Opis bibliograficzny:
- Borzeszkowski B., Lubowiecka I., Sauer R.: Nonlinear material identification of heterogeneous isogeometric Kirchhoff–Love shells// COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING -Vol. 390, (2022), s.114442-
- DOI:
- Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1016/j.cma.2021.114442
- Źródła finansowania:
- Weryfikacja:
- Politechnika Gdańska
wyświetlono 143 razy
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Material Identification of the Human Abdominal Wall Based On the Isogeometric Shell Model
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