Keywords :
Calibration; Contact; Hyper-elasticity; Inverse form; Large strains; Soft bodies; Contact tractions; Identification of material parameters; Inverse FORM; Optimization framework; Soft-bodies; Traction fields; Computational Mechanics; Mechanics of Materials; Mechanical Engineering; Computer Science Applications
Abstract :
[en] We provide an optimization framework that is capable of identifying the material parameters and contact traction field from two measured deformed geometries of a soft body in contact. The novelty of the framework is the idea of parametrizing the missing contact traction field and incorporating it into the inverse+forward hyper-elasticity formulation. We provide the continuum- and finite element formulation of the framework, as well as the direct differentiation method of sensitivity analysis to efficiently obtain necessary gradients for the BFGS optimizer. The correctness of the formulation and the excellent performance of the framework are confirmed by a series of benchmark numerical examples.
Disciplines :
Mechanical engineering
Engineering, computing & technology: Multidisciplinary, general & others
Physical, chemical, mathematical & earth Sciences: Multidisciplinary, general & others
Funding text :
This study was supported by the European Union's Horizon 2020 research and innovation program under grant agreement No. 811099, the Marie Skłodowska-Curie, Luxembourg grant agreement No. 764644, and the Fonds National de la Recherche (FNR), Luxembourg Project No. C20/MS/14782078/QuaC. JL would like to acknowledge the support from EU Horizon 2020 Marie Skłodowska Curie Individual Fellowship MOrPhEM under Grant 800150.This study was supported by the European Union’s Horizon 2020 research and innovation program under grant agreement No. 811099 , the Marie Skłodowska-Curie, Luxembourg grant agreement No. 764644 , and the Fonds National de la Recherche (FNR), Luxembourg Project No. C20/MS/14782078/QuaC. JL would like to acknowledge the support from EU Horizon 2020 Marie Skłodowska Curie Individual Fellowship MOrPhEM under Grant 800150 .
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