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- Title
Effect of crack on the dynamic response of bidirectional porous functionally graded beams on an elastic foundation based on finite element method.
- Authors
Dahmane, Mouloud; Benadouda, Mourad; Bennai, Riadh; Saimi, Ahmed; Atmane, Hassen Ait
- Abstract
The contribution provided in this study is to investigate the dynamic response of Euler–Bernoulli imperfect FG beams-cracked on Winkler-elastic foundation, considering pinned–pinned boundary condition. The equations are discretized with classical finite element method (h-FEM). The material properties are considered vary in the both; width and thickness directions of the beam, via power-law form. An approximate porosity model with uniform distribution was adopted. The cracked element stiffness is determined based on the reduction of the cross section of the bi-directional FG beam. While the elastic foundation Winkler-type has a longitudinal distribution and increases the system stiffness. The obtained numerical results in terms of dimensionless fundamental frequencies are compared with the results from previous studies for convergence studies. Case studies were conducted to analyze the influence of power law index, porosity values, crack depth, crack location, Winkler-elastic foundation parameters on the first three natural frequencies of the beam with pinned–pinned boundary condition. The results showed that the bi-directional distribution function has a significant role in approximating the values of frequencies. The current distribution function proved its eligibility in predicting the results of the dynamic behavior of beam structures with different models distribution.
- Subjects
ELASTIC foundations; FUNCTIONALLY gradient materials; FINITE element method; DISTRIBUTION (Probability theory); POWER law (Mathematics); CURRENT distribution
- Publication
Acta Mechanica, 2024, Vol 235, Issue 6, p3849
- ISSN
0001-5970
- Publication type
Article
- DOI
10.1007/s00707-024-03906-1