Enriched beam finite element models with torsion and shear warping for the analysis of thin-walled structures
نویسندگان
چکیده
This paper presents three beam Finite Element (FE) formulations developed for the analysis of thin-walled structures. These account out-of-plane cross-section warping by removing classical rigid body hypothesis and capture interaction axial/bending stress components with shear torsion. The FE models rely on different kinematic assumptions to describe deformations. Indeed, displacement field is interpolated in element volume according approaches, increasing level accuracy detail. First two adopt a coarse description, where defined as linear combination assumed profiles unknown parameters. In first model, these are considered equal generalized torsional curvature strains displacement-based formulation adopted derive governing equations. second parameters independent quantities mixed approach formulation. Third also relying formulation, independently interpolates introducing additional degrees freedom plane, thus, resulting richer description latter propose numerical procedure profile evaluation beams subjected forces, general geometry. efficiency proposed validated simulating response structures under torsion coupled torsion/shear actions influence characterizing each discussed.
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ژورنال
عنوان ژورنال: Thin-walled Structures
سال: 2021
ISSN: ['1879-3223', '0263-8231']
DOI: https://doi.org/10.1016/j.tws.2020.107259