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Instabilities in Elastic and Magneto-Elastic Beams and Shells: from Shell Buckling to the Design of a Programmable Braille Reader
Related publications (65)
Influence of model uncertainty and long term deformations in action effects calculation in reinforced concrete structures
Most codes of practice adopt a semi probabilistic design approach for the dimensioning and assessment of structures. Accordingly, structural safety is ensured by performing limit state verifications using design values determined with adequately calibrated ...
EPFL2024Short-term behavior of glass fiber-polymer composite bending-active elastica beam under service load application
Thomas Keller, Landolf-Giosef-Anastasios Rhode-Barbarigos, Tara Habibi
Bending-active elastica beam is a structural configuration that is based on the elastic deformation of an initially straight beam. This deformation occurs when horizontal displacements are applied to a sliding support, causing the beam to bend into an arch ...
2024Snap buckling of bistable beams under combined mechanical and magnetic loading
Pedro Miguel Nunes Pereira de Almeida Reis, Dong Yan, Tomohiko Sano, Arefeh Abbasi
We investigate the mechanics of bistable, hard-magnetic, elastic beams, combining experiments, finite-element modelling (FEM) and a reduced-order theory. The beam is made of a hard magneto-rheological elastomer, comprising two segments with antiparallel ma ...
ROYAL SOC2023Engineering random spin models with atoms in a high-finesse cavity
Random spin models play a key role in our understanding of disorder and complex many-body systems. Two all-to-all interacting, disordered models have now been realized using a cavity quantum electrodynamics platform. All-to-all interacting, disordered quan ...
NATURE PORTFOLIO2023Comparing the Buckling Strength of Spherical Shells With Dimpled Versus Bumpy Defects
Pedro Miguel Nunes Pereira de Almeida Reis, Fani Derveni, Arefeh Abbasi
We investigate the effect of defect geometry in dictating the sensitivity of the critical buckling conditions of spherical shells under external pressure loading. Specifically, we perform a comparative study between shells containing dimpled (inward) versu ...
ASME2023RUM: Reconfigurable Umbrella Mesh
Mark Pauly, Florin Isvoranu, Uday Kusupati, Seiichi Eduardo Suzuki Erazo
We propose Reconfigurable Umbrella Meshes (RUMs), a new class of preassembled deployable structures. A RUM has a compact rest state that can be easily altered to deploy into different bending-active 3D target shapes. RUMs consist of elastic beams and rigid ...
De Gruyter2023Non-destructive Prediction of the Buckling Load of Cylindrical Shells
The current research focuses on the prediction of the maximum axial compression load a cylindrical shell is able to bear. This maximum axial compression load is the value at which a cylindrical shell loses stability and abruptly buckles. After the buckling ...
EPFL2022Analytical modeling and experimental validation of rotationally actuated pinned–pinned and fixed–pinned buckled beam bistable mechanisms
Simon Nessim Henein, Loïc Benoît Tissot-Daguette, Hubert Pierre-Marie Benoît Schneegans, Etienne Frédéric Gabriel Thalmann
Buckled beams have become key building blocks in compliant mechanisms to achieve nonlinear behaviors, such as bistability, constant-force and stiffness tuning. However, designing and modeling such components is challenging due to their highly nonlinear cha ...
2022Assessment of stiffener spacing design requirements for intermediate EBF links via nonlinear finite element analysis
Dimitrios Lignos, Nikolaos Skretas
Links in eccentrically braced frames (EBFs) with intermediate length are designed with transverse web stiffeners. Web stiffening is required because the common failure modes are associated with web buckling as well as flange and lateral torsional buckling. ...
ETAM2022Progressive Correspondence Pruning by Consensus Learning
Mathieu Salzmann, Chenxu Zhao, Hongwei Li, Feng Zhu, Rui Zhao
Correspondence pruning aims to correctly remove false matches (outliers) from an initial set of putative correspondences. The pruning process is challenging since putative matches are typically extremely unbalanced, largely dominated by outliers, and the r ...
IEEE2021