Efficient analysis of plates on nonlinear foundations. (October 2017)

• Record Type: Journal Article
• Authors: Farid, Ahmed Fady; Reda, Marina; Rashed, Youssef F.
• Is Part Of: Engineering analysis with boundary elements. Volume 83(2017)
• Page Start: 1
• Page End: 24
• Publication Date: 2017-10
• Subjects: Boundary element method -- Finite element method -- Iterative solution -- Tensionless -- Elastic-plastic -- Plates; Boundary element methods -- Periodicals; Engineering mathematics -- Periodicals; Équations intégrales de frontière, Méthodes des -- Périodiques; Mathématiques de l'ingénieur -- Périodiques; Boundary element methods; Engineering mathematics; Periodicals; 620.00151
• DOI: 10.1016/j.enganabound.2017.07.003
• Languages: English
• ISSNs: 0955-7997

Abstract

Abstract: This paper presents efficient analysis of plates on nonlinear foundations. The Reissner plate theory is used to model plates. Foundations are presented as the Winkler springs or the elastic half space. The developed analysis is mainly presented for tensionless foundation; however as demonstrated, it is straightforward extended to analysis of elastic-plastic foundations. The plate is analyzed using the boundary element method (BEM). Unlike the traditional BEM which uses equations in form ([H] {u} = [G] {t}), the presented formulation uses finite element like equations, in the form of ([K] {u} = {P}). An innovative formulation is presented to derive the relevant plate stiffness matrix [K] and load vector {P} from the BEM integral equation. Iterative procedures together with condensation process are used to eliminate degree of freedom at failed zones. Results of the present analysis are more accurate than those obtained from previously published results. The main advantages of the presented technique are its simplicity and accuracy and it gains both advantages of the boundary element and the finite element methods.