Bilayer Plates: Model Reduction, Γ‐Convergent Finite Element Approximation, and Discrete Gradient Flow. Issue 3 (29th December 2015)

• Record Type: Journal Article
• Authors: Bartels, Sören; Bonito, Andrea; Nochetto, Ricardo H.
• Is Part Of: Communications on pure and applied mathematics. Volume 70:Issue 3(2017:Mar.)
• Page Start: 547
• Page End: 589
• Publication Date: 2015-12-29
• Subjects: Mathematics -- Periodicals; Mechanics -- Periodicals; Mathématiques -- Périodiques; Mécanique -- Périodiques; 510.5
• DOI: 10.1002/cpa.21626
• Languages: English
• ISSNs: 0010-3640

Abstract

Abstract : The bending of bilayer plates is a mechanism that allows for large deformations via small externally induced lattice mismatches of the underlying materials. Its mathematical modeling, discussed herein, consists of a nonlinear fourth‐order problem with a pointwise isometry constraint. A discretization based on Kirchhoff quadrilaterals is devised and its Γ‐convergence is proved. An iterative method that decreases the energy is proposed, and its convergence to stationary configurations is investigated. Its performance, as well as reduced model capabilities, are explored via several insightful numerical experiments involving large (geometrically nonlinear) deformations.© 2015 Wiley Periodicals, Inc.