Accurate through-the-thickness stress distributions in thin-walled metallic structures subjected to large displacements and large rotations
The present paper presents the evaluation of three-dimensional (3D) stress distributions of shell structures in the large displacement and rotation fields. The proposed geometrical nonlinear model is based on a combination of the Carrera Unified Formulation (CUF) and the Finite Element Method (FEM)...
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| Format: | Article |
| Language: | English |
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Publishing House for Science and Technology
2020-09-01
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| Series: | Vietnam Journal of Mechanics |
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| Online Access: | https://vjs.ac.vn/index.php/vjmech/article/view/15042 |
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| author | A. Pagani R. Azzara R. Augello E. Carrera B. Wu |
| author_facet | A. Pagani R. Azzara R. Augello E. Carrera B. Wu |
| author_sort | A. Pagani |
| collection | DOAJ |
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The present paper presents the evaluation of three-dimensional (3D) stress distributions of shell structures in the large displacement and rotation fields. The proposed geometrical nonlinear model is based on a combination of the Carrera Unified Formulation (CUF) and the Finite Element Method (FEM). Besides, a Newton-Raphson linearization scheme is adopted to compute the geometrical nonlinear equations, which are constrained using the arc-length path-following method. Static analyses are performed using refined models and the full Green-Lagrange strain-displacement relations. The Second Piola-Kirchhoff (PK2) stress distributions are evaluated, and lower- to higher-order expansions are employed. Popular benchmarks problems are analyzed, including cylindrical isotropic shell structure with various boundary and loading conditions. Various numerical assessments for different equilibrium conditions in the moderate and large displacement fields are proposed. Results show the distribution of axial and shear stresses, varying the refinement of the proposed two-dimensional (2D) shell model. It is shown that for axial components, a lower-order expansion is sufficient, whereas a higher-order one is needed to accurately predict shear stresses.
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| format | Article |
| id | doaj-art-2a80492da1d04036bac00e2fcf93f220 |
| institution | DOAJ |
| issn | 0866-7136 2815-5882 |
| language | English |
| publishDate | 2020-09-01 |
| publisher | Publishing House for Science and Technology |
| record_format | Article |
| series | Vietnam Journal of Mechanics |
| spelling | doaj-art-2a80492da1d04036bac00e2fcf93f2202025-08-20T03:04:44ZengPublishing House for Science and TechnologyVietnam Journal of Mechanics0866-71362815-58822020-09-0142310.15625/0866-7136/15042Accurate through-the-thickness stress distributions in thin-walled metallic structures subjected to large displacements and large rotationsA. Pagani0https://orcid.org/0000-0001-9074-2558R. Azzara1R. Augello2E. Carrera3B. Wu4Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Torino, ItalyDepartment of Mechanical and Aerospace Engineering, Politecnico di Torino, Torino, ItalyDepartment of Mechanical and Aerospace Engineering, Politecnico di Torino, Torino, ItalyDepartment of Mechanical and Aerospace Engineering, Politecnico di Torino, Torino, ItalySchool of Mathematics, Statistics and Applied Mathematics, NUI Galway, University Road, Galway, Ireland The present paper presents the evaluation of three-dimensional (3D) stress distributions of shell structures in the large displacement and rotation fields. The proposed geometrical nonlinear model is based on a combination of the Carrera Unified Formulation (CUF) and the Finite Element Method (FEM). Besides, a Newton-Raphson linearization scheme is adopted to compute the geometrical nonlinear equations, which are constrained using the arc-length path-following method. Static analyses are performed using refined models and the full Green-Lagrange strain-displacement relations. The Second Piola-Kirchhoff (PK2) stress distributions are evaluated, and lower- to higher-order expansions are employed. Popular benchmarks problems are analyzed, including cylindrical isotropic shell structure with various boundary and loading conditions. Various numerical assessments for different equilibrium conditions in the moderate and large displacement fields are proposed. Results show the distribution of axial and shear stresses, varying the refinement of the proposed two-dimensional (2D) shell model. It is shown that for axial components, a lower-order expansion is sufficient, whereas a higher-order one is needed to accurately predict shear stresses. https://vjs.ac.vn/index.php/vjmech/article/view/15042Carrera Unified Formulationthree-dimensional stress fieldsecond Piola-Kirchhoff stressrefined 2D shell theorygeometrical nonlinearity |
| spellingShingle | A. Pagani R. Azzara R. Augello E. Carrera B. Wu Accurate through-the-thickness stress distributions in thin-walled metallic structures subjected to large displacements and large rotations Vietnam Journal of Mechanics Carrera Unified Formulation three-dimensional stress field second Piola-Kirchhoff stress refined 2D shell theory geometrical nonlinearity |
| title | Accurate through-the-thickness stress distributions in thin-walled metallic structures subjected to large displacements and large rotations |
| title_full | Accurate through-the-thickness stress distributions in thin-walled metallic structures subjected to large displacements and large rotations |
| title_fullStr | Accurate through-the-thickness stress distributions in thin-walled metallic structures subjected to large displacements and large rotations |
| title_full_unstemmed | Accurate through-the-thickness stress distributions in thin-walled metallic structures subjected to large displacements and large rotations |
| title_short | Accurate through-the-thickness stress distributions in thin-walled metallic structures subjected to large displacements and large rotations |
| title_sort | accurate through the thickness stress distributions in thin walled metallic structures subjected to large displacements and large rotations |
| topic | Carrera Unified Formulation three-dimensional stress field second Piola-Kirchhoff stress refined 2D shell theory geometrical nonlinearity |
| url | https://vjs.ac.vn/index.php/vjmech/article/view/15042 |
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