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3D small strain large deflection beam shape sensing including poisson effect

Pierre-Loup Schaefer 1 Grégory Chagnon 2 Alexandre Moreau-Gaudry 1
1 TIMC-GMCAO - Gestes Medico-chirurgicaux Assistés par Ordinateur
TIMC - Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525
2 TIMC-BioMMat - Ingénierie Biomédicale et Mécanique des Matériaux
TIMC - Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525
Abstract : This article presents a new method to monitor beam shapes from strain measures. The beam is instrumented with strain sensors placed on its surface with an angle of orientation. The method developed is a 3D large deflection beam shape reconstruction based on a beam model incorporating Poisson effect and is thus able to take into account bending, torsion, shearing and tensile-compression deformations. Exemple of application on circular beams is conducted with beam shape reconstructed from FEM simulations strain measures. Results show that, compared to beam shape sensing methods using axial strain, the beam shape method proposed provides a significant increase in the reconstruction accuracy when the beam is subject to deformations containing torsion.
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Pierre-Loup Schaefer, Grégory Chagnon, Alexandre Moreau-Gaudry. 3D small strain large deflection beam shape sensing including poisson effect. Engineering Structures, Elsevier, 2019, pp.109948. ⟨10.1016/j.engstruct.2019.109948⟩. ⟨hal-02425954⟩

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