Hybrid finite element formulation for geometrically nonlinear buckling analysis of truss with initial length imperfection

This paper presents a novel hybrid FEM-based approach for nonlinear buckling analysis of truss with initial length imperfection. The contribution deals with establishing two types of truss finite element (perfection and imperfection element) considering large displacement based on displacement formu...

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Bibliographic Details
Published in:E3S web of conferences 2021, Vol.281, p.4002
Main Authors: Quyen, Vu Thi Bich, Tien, Dao Ngoc
Format: Article
Language:English
Subjects:
Buckling
Defects
Finite element method
Hybrid systems
Iterative algorithms
Iterative methods
Mathematical analysis
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Summary:This paper presents a novel hybrid FEM-based approach for nonlinear buckling analysis of truss with initial length imperfection. The contribution deals with establishing two types of truss finite element (perfection and imperfection element) considering large displacement based on displacement formulation and mixed formulation. Therefore, the hybrid global equation system is developed by assembling perfection and imperfection truss elements. The incremental-iterative algorithm based on the arc-length method is used to establish calculation programs for solving geometrically nonlinear buckling analysis of truss with initial length imperfection. Using a written calculation program, the numerical test is presented to investigate the equilibrium path for plan truss with initial member length imperfection.
ISSN:2267-1242
2555-0403
2267-1242
DOI:10.1051/e3sconf/202128104002