Vol. 7, No. 4, 2019

Download this article
Download this article For screen
For printing
Recent Issues
Volume 8, Issue 3
Volume 8, Issue 2
Volume 8, Issue 1
Volume 7, Issue 4
Volume 7, Issue 3
Volume 7, Issue 2
Volume 7, Issue 1
Volume 6, Issue 4
Volume 6, Issue 3
Volume 6, Issue 2
Volume 6, Issue 1
Volume 5, Issue 3-4
Volume 5, Issue 2
Volume 5, Issue 1
Volume 4, Issue 3-4
Volume 4, Issue 2
Volume 4, Issue 1
Volume 3, Issue 4
Volume 3, Issue 3
Volume 3, Issue 2
Volume 3, Issue 1
Volume 2, Issue 2
Volume 2, Issue 1
Volume 1, Issue 2
Volume 1, Issue 1
The Journal
About the Journal
Editorial Board
Subscriptions
Submission Guidelines
Submission Form
Ethics Statement
Editorial Login
ISSN: 2325-3444 (e-only)
ISSN: 2326-7186 (print)
Author Index
To Appear
 
Other MSP Journals

Change is coming to MEMOCS: This journal is becoming a
subscription journal with select diamond open-access articles.
Read more about it.

Equilibrium paths of Hencky pantographic beams in a three-point bending problem

Emilio Turco and Emilio Barchiesi

Vol. 7 (2019), No. 4, 287–310
Abstract

We investigate the mechanical behavior of so-called pantographic beams undergoing large deformations. To this aim, an exact-kinematics Hencky pantographic beam model has been employed in a three-point bending test. Given the occurrence of local snap-through instabilities and limit points, said Hencky model has been solved by means of a step-by-step strategy based on Riks’s arc-length method. Such a method has been particularly adapted for the case of problems with prescribed displacements, as opposed to those with prescribed forces. Numerical simulations performed by varying the stiffness parameters are discussed, aimed at getting an insight into the different behaviors which can be exhibited by pantographic beams. Numerical simulations performed by varying the quantity of unit cells for fixed total length allow instead to understand whether the observed features are inherent to the pantographic beam structure or size-dependent. Therefore, beyond being interesting for possible future engineering exploitation, we believe this phenomenological evidence to be useful in guiding the formulation of conjectures regarding observed microscale local snap-through instability phenomena in the framework of a previously proposed macroscale continuum model for pantographic beams obtained by asymptotic homogenization.

Keywords
pantographic beams, Lagrangian models, nonlinear analysis
Mathematical Subject Classification 2010
Primary: 74B20
Milestones
Received: 3 July 2019
Accepted: 1 December 2019
Published: 31 December 2019

Communicated by Pierre Seppecher
Authors
Emilio Turco
Dipartimento di Architettura, Design e Urbanistica
Università degli Studi di Sassari
Sassari
Italy
Emilio Barchiesi
Dipartimento di Ingegneria Strutturale e Geotecnica
Università degli Studi di Roma “La Sapienza”
Roma
Italy