Institute of Machine Components’ Post

Today I joined the Eurosteel 2023 conference in Amsterdam, where I talked about one of the key points regarding my PhD work: analysing the influence of the connections between detachable links and EBFs by the use of FEM analyses. Here is the full paper about this field: https://lnkd.in/eZcjdwab

It has been a great week at the 6th International Itasca Symposium, where I had the opportunity to present our (Riccardo Fanni, Andy Fourie, Mauro Giuliano Sottile) paper "Numerical simulations of loose initially uniform specimens in drained triaxial compression." The paper can be downloaded here: https://lnkd.in/dfNEtwFB In this work we compared experimental end-of-test uniformity assessments of drained triaxial tests on a clay-sand mixture to numerical predictions using the NorSand constitutive model in FLAC2D. Tests with both lubricated and rough ends were compared. Generally, good agreement was seen between the experiments and simulations, in particular the highly non-uniform stress and end-of-test void ratio conditions of the tests with rough ends.

This is a link to our recent holography paper on Kudos! https://lnkd.in/eG2Dp7pu

Today is Pi Day (3/14)! Did you know that the Greek inventor Archimedes is believed to be the first person to estimate the value of Pi at 3.14? Did you know that Archimedes also made important contributions to the field of vertical transportation? He contributed to the theoretical understanding of pulley systems and is credited with inventing the first complete block-and-tackle device. One legend says that he showed off his creation by using it to single-handedly hoist a ship off the ground and lower it onto the Mediterranean Sea. In fact, it might be argued that without these foundational inventions, we could never have developed the sophisticated lifting technology we use in our industry today – from passenger elevators to the powerful hoists used during lift installation. (That includes the High-Speed Capstan Hoist you see in the picture – which you can learn more about here: https://lnkd.in/eAXrV5wu.)

I am happy to share that our paper entitled "A Family of Models of Hard and Soft Interfaces with Damage" in coauthorship with Frédéric Lebon and Maria Letizia Raffa has just been published in TAFMEC (Theoretical and Applied Fracture Mechanics). In this paper, we propose an interface model simulating the damaging response of thin (soft or hard) adhesives. The effect of the damage velocity is introduced, causing the transition from quasi-brittle to brittle behavior as the damage velocity decreases. Here is the link to download the paper: https://lnkd.in/dTtQuTZG

📣 Today, my dear colleague Alessio Cellupica brilliantly presented a study I co-authored at the ECCOMAS Thematic Conference on Multibody Dynamics. 🔖 The aim of our work was to evaluate the performance of Flexible Multibody models in the prediction of contact forces and displacements of a toothbrush during its operations. 📚 Brushing is a specific procedure that aims to remove biofilms from vertical and occlusal tooth surfaces and as much as possible from interdental spaces. The most common question about toothbrush development is the estimation of contact force for the assessment of cleaning performance and safety. 🔎 The Flexible Multibody methodology represents a very suitable approach to analyze this large-displacement nonlinear problem and thus it can be a valid tool for improving the design of bristles. 📈 In this paper, two DFM models, have been adopted. The results are compared with an experimental setup.

EngLab@NTUA and QuAID³ were at Madrid for the 19th European Mechanics of Materials Conference and George Pissas presented recent developments on resolving fractures in long fibre composites. We very much thank the organizers for setting up a wonderful and inspiring venue. The research project QuAID³ is implemented in the framework of H.F.R.I call “Basic research Financing (Horizontal support of all Sciences)” under the National Recovery and Resilience Plan “Greece 2.0” funded by the European Union – NextGenerationEU (H.F.R.I. Project Number: 15097). ΕΛΙΔΕΚ - Ελληνικό Ίδρυμα Έρευνας και Καινοτομίας

I am excited to share our recent article titled "A poro-elastic model of sound propagation in granular materials" in Journal of Sound and Vibration. I would like to thank my co-authors Guochenhao Song, Tongyang Shi, and J Stuart Bolton for advancing our research project to the current stage in collaboration. In the present work, we proposed a poro-elastic model realized with finite difference method, which describes the sound propagation in granule stacks loaded in a cylindrical container. The proposed model takes the unique properties of granule stacks into consideration, and generates simulation results that closely match the measured features of absorption coefficient of granule stack samples. The paper can be accessed for free before April 02 using the link: https://lnkd.in/gbXRpnU5

We are excited to announce the publication of a paper co-authored by several members of the NEUROPIC project. The interaction between light and matter is generally rather weak. This is also the case of the optomechanical interaction, in which the electromagnetic field couples with motional degrees of freedom (vibrations and mechanical displacements of all sorts) of an object. This interaction is mediated by radiation pressure and gives rise to a number of interesting physical process, the most remarkable are the cooling of an nano-object to its ground state and the amplification of a given vibration through dynamical backaction. As any other coupling mechanism, it is possible to engineer it and enhance it by confining the electromagnetic field at the nanoscale. In the recent paper published in Annalen der Physik S. Edelstein et al. analyze two possible nanostructure geometries and perform an optimization analysis of the two figures of merit governing this process: the spectral linewidth of the optical resonator (i.e. quality factor) and the coupling strength between the optical resonator and the vibrations of the system. Congratulations to the authors of this work: Shulamit Edelstein, Jordi Gomis-Bresco, Guillermo Arregui Bravo, Peter koval, Daniel Lanzillotti Kimura, Daniel Torrent, Clivia M Sotomayor Torres, Pedro David Garcia Fernandez You can access the paper here: https://lnkd.in/dczJt_d8