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Research Spotlight: Efficient GBT Displacement-Based Finite Elements for Non-Linear Problems

2017 Annual Stability Conference Presentation

Session S12 – Advances in Stability Analysis Friday, March 24, 2017 1:00 pm

Efficient GBT Displacement-Based Finite Elements for Non-Linear Problems

In this paper it is shown that the computational efficiency of GBT displacement-based finite elements can be significantly improved by resorting to a “node-based” DOF approach. Although the standard GBT deformation modes are not directly included in the analysis, their participations are straightforwardly recovered in the post-processing stage. Although more cross-section DOFs are involved, the additional cost is offset by the overall efficiency of the formulation. In addition, discrete variations of the wall thickness in the longitudinal direction can be easily handled, including holes. Illustrative numerical examples, involving linear and non-linear problems, are presented and discussed.

Rodrigo de Moura Goncalves, Universidade Nova de Lisboa, Caparica, Portugal; Dinar Camotim, Univeristy of Lisbon, Lisbon, Portugal

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