A Moore–Penrose continuation method based on a Schur complement approach for nonlinear finite element bifurcation problems. (May 2015)

• Record Type: Journal Article
• Authors: Léger, S.; Deteix, J.; Fortin, A.
• Is Part Of: Computers & structures. Volume 152(2015)
• Page Start: 173
• Page End: 184
• Publication Date: 2015-05
• Subjects: Finite element method -- Moore–Penrose continuation method -- Schur complement -- Bifurcations -- Branch following -- Buckling; Structural engineering -- Data processing -- Periodicals; Electronic data processing -- Structures, Theory of -- Periodicals; 624.171
• DOI: 10.1016/j.compstruc.2015.02.003
• Languages: English
• ISSNs: 0045-7949

Abstract

Highlights: A new implementation technique for the Moore–Penrose continuation method is proposed. The technique is based on a Schur complement approach. Easy implementation in an existing finite element code. Detection of bifurcation points and branch following are simplified. Good performance is illustrated with numerical examples. Abstract: Continuation methods have proved to be very powerful tools when solving large finite element problems. However, implementation of these methods often require modifications to the standard finite element method. As a finite element code is already very complex, we would like to implement the continuation method as efficiently as possible. In this paper, we present a new implementation technique based on a Schur complement approach for the Moore–Penrose continuation method. This method facilitates the detection of bifurcation points and also enables branch following. Numerical examples will be presented and analyzed using the proposed approach.