Bifurcation of elastic curves with modulated stiffness - Archive ouverte HAL Access content directly
Preprints, Working Papers, ... Year : 2021

Bifurcation of elastic curves with modulated stiffness

Abstract

We investigate the equilibrium configurations of closed planar elastic curves of fixed length, whose stiffness, also known as the bending rigidity, depends on an additional density variable. The underlying variational model relies on the minimization of a bending energy with respect to shape and density and can be considered as a one-dimensional analogue of the Canham-Helfrich model for heterogeneous biological membranes. We present a generalized Euler-Bernoulli elastica functional featuring a density-dependent stiffness coefficient. In order to treat the inherent nonconvexity of the problem we introduce an additional length scale in the model by means of a density gradient term. We derive the system of Euler-Lagrange equations and study the bifurcation structure of solutions with respect to the model parameters. Both analytical and numerical results are presented.
Fichier principal
Vignette du fichier
ms.pdf (2.8 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-03025931 , version 1 (26-11-2020)
hal-03025931 , version 2 (09-12-2020)
hal-03025931 , version 3 (13-10-2021)

Identifiers

  • HAL Id : hal-03025931 , version 3

Cite

Katharina Brazda, Gaspard Jankowiak, Christian Schmeiser, Ulisse Stefanelli. Bifurcation of elastic curves with modulated stiffness. 2021. ⟨hal-03025931v3⟩

Collections

INSMI TDS-MACS
48 View
36 Download

Share

Gmail Facebook X LinkedIn More