Advanced SearchSearch Tips
Improvement of Euler-Bernoulli Beam Theory for Free Vibration and Buckling Analyses via Saint-Venant's Principle
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Improvement of Euler-Bernoulli Beam Theory for Free Vibration and Buckling Analyses via Saint-Venant's Principle
Jeong, Yong-Min; Kim, Jun-Sik;
  PDF(new window)
In this paper, the methodology applied to the improvement of stress analyses is extended to free vibration and buckling analyses. The essence of the methodology is the Saint-Venant's principle that is applicable to beam and plate models. The principle allows one to dimensionally reduce three-dimensional elasticity problems. Thus the methodology can be employed to vibration and buckling as well as stress analysis. First, the principle is briefly revisited, and then the formations of classical beam theories are presented. To improve the predictions, the perturbed terms (unknowns) are introduced together with the warping functions that are calculated by stress equilibrium equations. The unknowns are then calculated by applying the equivalence of stress resultants (i.e., Saint-Venant's principle). As numerical examples, cantilever and simply supported beams are analytically solved. The results obtained are compared with those of the classical beam theories. It is shown that the methodology can be used to improve the predictions without introducing shear correction factors.
Saint-Venant's Principle;Free Vibration Analysis;Buckling Analysis;
 Cited by
Timoshenko, S. P. and Goodier, J. N., 1951, Theory of Elasticity, McGraw-Hill, New York.

Dym, C. L. and Shames, I. H., 1982, Solid Mechanics : A Variational Approach, McGraw-Hill, New York.

Cho M. and Parmerter, R. R., 1992, "An Efficient Higher Order Plate Theory for Laminated Composites," Compos. Struct. Vol. 20, pp.113-123. crossref(new window)

Cho, M., 1994, "Review on Higher Order Laminated Composite Plate Modelings," Trans. Korean Soc. Mech. Eng., Vol. 34, No. 7, pp. 517-526.

Cho M. and Kim, J.-S., 1996, "Four-noded Finite Element Post-process Method Using a Displacement Field of Higher Order Laminated Composite Plate Theory," Comput. Struct., Vol. 61, No. 2, pp. 283-290. crossref(new window)

Kim J.-S. and Cho, M., 2005, "Enhanced First-order Shear Deformation Theory for Laminated and Sandwich Plates," J. Appl. Mech-T ASME, Vol. 72, pp. 809-817. crossref(new window)

Kim, J.-S. and Cho, M., 2011, "A Novel Methodology of Improving Stress Prediction via Saint-Venant's Principle," J. Comput. Struct. Eng. Inst. Korea, Vol. 24, No. 2, pp. 149-156.

Gruttmann, F. and Wagner, W., 2001, "Shear Correction Factors in Timoshenko'S Beam Theory for Arbitrary Shaped Cross-sections," Comput. Mech., Vol. 27, p.199-207. crossref(new window)

Kim, J.-S., 2012, "Application of Saint-Venant's Principle to Anisotropic Beam," Trans. Korean Soc. Mech. Eng. A, Vol. 36, No. 4, pp. 451-455. crossref(new window)

von Mises, R., 1945, "On Saint Venant's Principle," Bull. Am. Math. Soc., Vol. 51, pp.555-562. crossref(new window)

Fung, Y. C., 1965, Foundations of Solid Mechanics, Prentice-Hall, Inc., New Jersey, pp.304-309.