| Full text | |
| Author(s): |
Total Authors: 3
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| Affiliation: | [1] Univ Sao Paulo, Escola Engn Sao Carlos, Ave Trabalhador Sao Carlense 400, Sao Carlos, SP - Brazil
Total Affiliations: 1
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| Document type: | Journal article |
| Source: | LATIN AMERICAN JOURNAL OF SOLIDS AND STRUCTURES; v. 18, n. 2 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
Abstract The importance of knowing critical loads and post-critical behavior of thin-walled structures motivates the development of several scientific and practical studies. Most references are concerned with stability analysis for small displacements (first order approach), or with second order stability analyzes, a less precise geometric nonlinear strategy. However, very flexible structures or ones that present small loss of stiffness after the first critical load need more careful analysis. Here we present a shell numerical formulation capable of carrying out stability analysis of thin-walled structures developing large displacements. This formulation uses generalized unconstrained vectors as nodal parameters instead of rotations. To make possible a complete stability analysis using unconstrained vectors, we present an original strategy that imposes a Conjugate Modal Force at the vicinity of critical points, allowing an accurate choice of post-critical paths. Non-conservative forces are also considered and results are compared with literature benchmarks, demonstrating the accuracy and capacity of the proposed formulation. (AU) | |
| FAPESP's process: | 20/05393-4 - Numerical formulations for the analysis of advanced materials and structures |
| Grantee: | Humberto Breves Coda |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 18/19288-8 - Development of a computational tool for structural collapse analysis by the positional finite element method |
| Grantee: | Henrique Barbosa Soares |
| Support Opportunities: | Scholarships in Brazil - Doctorate |