A simplified solution of the torsional rigidity of the composite beams by using FEM

Saygün A., OMURTAG M. H., Orakdöğen E., Girgin K., Küçükarslan S., Darılmaz K.

Advances in Structural Engineering, vol.10, no.5, pp.467-473, 2007 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 10 Issue: 5
  • Publication Date: 2007
  • Doi Number: 10.1260/136943307782417726
  • Journal Name: Advances in Structural Engineering
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.467-473
  • Keywords: Composite beam, Finite element method, Numerical analysis, Saint-Venant's stress function, Torsional rigidity
  • Istanbul Medipol University Affiliated: Yes


In this paper, the torsional rigidity of the composite sections formed by different materials is obtained by using a finite element procedure. In the derivation of the differential equation, the Saint-Venant's stress function was used. The obtained partial differential equation was discretized by finite elements to get the potentials in the nodal points. After the calculations of the unknown potentials on the composite cross-section, the torsional rigidity is calculated by integrating the potentials on the solution domain. To test the validity of the proposed algorithm, the available analytical and numerical results from the previous studies were studied. It was seen that this new algorithm is efficient and simpler than the previous ones.