Improvement of Euler-Bernoulli Beam Theory for Free Vibration and Buckling Analyses via Saint-Venant`s Principle

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;

Abstract
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.
Keywords
Saint-Venant`s Principle;Free Vibration Analysis;Buckling Analysis;
Language
Korean
Cited by
1.
이방성 복합재료 적층평판의 자유진동해석 개선을 위한 생브낭 원리의 적용,정용민;김준식;

대한기계학회논문집A, 2017. vol.41. 12, pp.1195-1201
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