Article
Materials Science, Multidisciplinary
Ting-Uei Lee, Yan Chen, Michael T. Heitzmann, Joseph M. Gattas
Summary: This study introduces a new type of compliant curved-crease origami-inspired metamaterial constructed with an 'elastica' non-zero principal surface curvature, showing influence of construction parameters on nonlinear force-displacement response characteristics. The development of a concise analytical method allows for rapid prediction and direct design of a metamaterial with a fully programmable compliant force-displacement response.
MATERIALS & DESIGN
(2021)
Article
Mechanics
Donghui Zhao, TianQiao Liu, Xiaofeng Lu, Xinmiao Meng
Summary: A novel curved sandwich panel with pultruded GFRP strip core was proposed and studied in this work. Experimental and numerical results showed that increasing the surface thickness can improve load-carrying capacity and change the failure mode.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
S. Mukherjee, S. Adhikari
Summary: The paper proposes an analytical framework to analyze and quantify the elastic properties of two-dimensional hexagonal lattices with curved elements. It is found that curved beam elements significantly increase the flexibility of the lattice and expand the design space. The analytical approach and expressions provided in the paper offer an efficient framework for the analysis and design of curved lattice materials.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Yin-lei Huo, Xue-sheng Pei, Meng-yao Li
Summary: In this paper, the large deformation equilibrium equation of the plane arc-curved beam is derived and the solutions for tangent slope angle and geometric configurations are provided. The study reveals that the curved beam exhibits significant nonlinear deformation characteristics, allowing it to store more energy and produce less reaction force, making it suitable for energy-absorbing structures.
Article
Materials Science, Multidisciplinary
Lu Lu, Jize Dai, Sophie Leanza, Ruike Renee Zhao, John W. Hutchinson
Summary: The stability of a hexagram ring with six curved sides is explored, including its various equilibrium states and the conditions for stability. The ring is formed by bending uniform rods with equal natural curvatures into 120° or 240° arcs and joining them at a cusp to create a 1-loop planar ring. The stability analysis involves different shapes and cross-sections of the rods as well. Experimental demonstrations and numerical simulations are presented to validate the findings.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Chemistry, Multidisciplinary
Sepideh Norouzi, Antonio Tavera-Vazquez, Johanan Ramirez-de Arellano, Dae Seok Kim, Teresa Lopez-Leon, Juan J. de Pablo, Jose A. Martinez-Gonzalez, Monirosadat Sadati
Summary: This study investigates the crystallization behavior of blue phase liquid crystals under curved confinement. The results show that the high curvature and spatial confinement can lead to the reconfiguration of the BPI phase into the BPII phase, resulting in different optical characteristics and structural morphologies. Additionally, the coupling of curvature and confinement leads to the nucleation of skyrmions at greater thicknesses.
Article
Engineering, Mechanical
Chuhan Wu, Liangchi Zhang, Peilei Qu, Shanqing Li, Zhenglian Jiang, Yan Wang
Summary: This paper presents a numerical strategy for predicting interface stresses in metal strip rolling. Key rolling factors such as roll elasticity, fluid lubrication, and asperity contacts were integrated into the numerical analysis. The study finds that both lubrication and microscale asperity contacts significantly influence contact stresses at the rolling interface, and proper rolling conditions can regulate the stresses reasonably.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Multidisciplinary Sciences
Mengfei He, Vincent Demery, Joseph D. Paulsen
Summary: This study investigates a thin-membraned balloon as a prototypical system with a doubly curved gross shape and large amplitude undulations. By probing its side profiles and horizontal cross-sections, the mean behavior of the film is found to be consistent with predictions from a geometric model. Additionally, a minimal model for the horizontal cross-sections of the balloon is proposed, which successfully reproduces various phenomena observed in experiments. These results establish a route to combine global and local features consistently over an enclosed surface.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Editorial Material
Neurosciences
Wenjun Guo, Lei Chen
Summary: The monomeric architecture of mechanosensitive ion channels TMEM63A and TMEM63B is reported in this issue of Neuron. It is shown that these high-threshold channels function as monomers on the plasma membrane.
Editorial Material
Multidisciplinary Sciences
Julia V. V. Seidel, Louise D. D. Nielsen
Summary: An unprecedented observation of a distant planet provides insights into its formation, highlighting its significance in atmospheric chemistry research. Scientists celebrate the breakthrough enabled by advanced technology.
Article
Engineering, Mechanical
Atul Bhaskar, Kevin Jose
Summary: The study assesses the spatial spread of a fold within a narrow elastic strip theoretically and computationally in the small deflection regime, highlighting the role of Poisson's coupling and surface twist. A critical Poisson's ratio separates monotonically decaying fold profiles from oscillatory folds, with separable solutions producing length-wise localized folds in excellent agreement with simulations. The persistence length is highly sensitive to the material's Poisson's ratio, and a mathematical analogy to elastic structures on foundations is established.
EXTREME MECHANICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Lu Lu, Jize Dai, Sophie Leanza, John W. Hutchinson, Ruike Renee Zhao
Summary: In this study, the transitions between multiple equilibrium states of curved-sided hexagrams were investigated using a multisegment Kirchhoff rod model, finite element simulations, and experiments. It was found that the transitions between these equilibrium states were influenced by both the natural curvature and the loading position. Within a specific natural curvature range, the star hexagram, the daisy hexagram, and the 3-loop 8 can transform among one another by bending at different positions. Based on these findings, the natural curvature range and loading conditions for achieving transitions between these equilibrium states were identified for a specific cross-section shape.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Mechanics
X. Li, X. J. Tian, Y. T. Zhou
Summary: The paper investigates the size effect in miniaturized thermoelectric devices by establishing a nonlinear contact model of a thermoelectric strip to reveal the thickness size effect. By solving singular integral equations using collocation methods, it is shown that the thermoelectric effects combined with the thickness size effect complicate the problem. Numerical results demonstrate the impact of thickness size effects on various parameters such as normal electric current density, normal energy flux, contact pressure, and their respective intensity factors.
Article
Psychology, Multidisciplinary
Patrick Connolly
Summary: Tschacher and Haken have applied a systems-based approach to model the psychotherapy process and explore the potential beneficial effects of deterministic and chaotic changes in the client's experience. The study highlights the importance of therapeutic alliance in inducing client instability, leading to the emergence of a new hierarchical level and a reduction in precisions of the client's priors. This process is considered a necessary precursor to change in psychotherapy. The research suggests that beneficial forms of instability are often overlooked in psychotherapy and discusses potential situations where instability may not be beneficial or potentially harmful.
FRONTIERS IN PSYCHOLOGY
(2022)
Article
Computer Science, Interdisciplinary Applications
M. S. H. Al-Furjan, Mostafa Habibi, Dong Won Jung, Seyedehfatemeh Sadeghi, Hamed Safarpour, Abdelouahed Tounsi, Guojin Chen
Summary: In this study, the characteristics of propagated waves in a sandwich structure with a soft core and multi-hybrid nanocomposite face sheets were investigated. The study found that the sensitivity of the phase velocity of the sandwich panel to carbon nanotubes (CNTs) and different face sheet patterns can decrease when the core of the panel is thicker. It was also observed that the effects of fiber angle and core to total thickness ratio on the phase velocity are independent of the wavenumber.
ENGINEERING WITH COMPUTERS
(2022)
Article
Multidisciplinary Sciences
Loic Tadrist, L. Motte, O. Rahli, Loures Tadrist
ROYAL SOCIETY OPEN SCIENCE
(2019)
Article
Biophysics
Chih-Yu Yang, Michael Erickstad, Loic Tadrist, Edward Ronan, Edgar Gutierrez, Jerome Wong-Ng, Alex Groisman
BIOPHYSICAL JOURNAL
(2020)
Article
Mechanics
Thomas Barois, Guillaume Ricard, Victor Champain, Lucas Gey, Hamid Kellay
Article
Physics, Multidisciplinary
Thomas Barois, Jean-Francois Boudet, Juho S. Lintuvuori, Hamid Kellay
PHYSICAL REVIEW LETTERS
(2020)
Article
Engineering, Mechanical
Loic Tadrist, Baptiste Darbois Texier, Francois Lanzetta, Lounes Tadrist
Summary: Pressurised membranes are crucial in various human-related situations such as protection and sports. The impact mechanics of membranes, particularly the effect of inflation pressure on contact time, has been studied using a model experiment with a spherical membrane. Results show that contact time is mainly determined by the presso-inertial number IP, with corrections made based on the presso-elastic number PE and relative inflation P.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)
Article
Engineering, Mechanical
Juliette Lepagneul, Loic Tadrist, Jean-Michel Sprauel, Jean-Marc Linares
Summary: This paper proposes a fatigue design strategy for PRS mechanisms, combining the Hertz contact model and a multi-axial fatigue criterion. Two examples are used to apply this method. The study finds that the lifespan of PRS mechanism depends on the maximal Dang Van stress, and the critical contact point is not always on the roller-screw side.
MECHANISM AND MACHINE THEORY
(2022)
Article
Engineering, Multidisciplinary
Loic Tadrist, Younes Mammadi, Julien Diperi, Jean-Marc Linares
Summary: This paper studies the mechanics of a cellular material inspired by the pulvini of Mimosa pudica, finding that reversible buckling-induced motion can be achieved by changing the pressure pattern and magnitude.
BIOINSPIRATION & BIOMIMETICS
(2022)
Article
Engineering, Multidisciplinary
Raphael Perrier, Loic Tadrist, Jean-Marc Linares
Summary: This paper analyzes the definitions of resilience and proposes an index for quantifying the resilience of actuators. The study finds that manufactured actuators, such as hydraulic cylinders and bio-inspired McKibben muscles, are not designed to be resilient, while biological actuators, such as the pulvinus and skeletal muscles, may have higher resilience. The origins of resilience are discussed, suggesting that it may stem from multi-scale structural design.
BIOINSPIRATION & BIOMIMETICS
(2023)
Article
Engineering, Industrial
Juliette Lepagneul, Loic Tadrist, Emmanuel Mermoz, Jean-Marc Linares
Summary: This paper analyzes the influence of design parameters on the axial backlash of planetary roller screw mechanisms (PRSMs) in aerospace applications. The results indicate that three parameters are crucial for aerospace applications.
CIRP ANNALS-MANUFACTURING TECHNOLOGY
(2023)
Article
Physics, Fluids & Plasmas
Baptiste Darbois Texier, Loic Tadrist
Summary: Pressurized membranes are commonly used in low cost structures, impact protection and sport balls. The coefficient of restitution, which represents the ability of a membrane to dissipate energy during an impact, is influenced by membrane properties, inflation pressure, and impact speed. A model experiment using a spherical membrane shows that the coefficient of restitution increases with inflation pressure but decreases with impact speed. The dependency of the coefficient of restitution on mechanical parameters, pressurization, and impact characteristics is also discussed.
Article
Physics, Fluids & Plasmas
Thomas Barois, Ilyes Jalisse, Loic Tadrist, Emmanuel Virot
Summary: The research reveals that for sufficiently narrow elastic sheets, buckling transition occurs due to stress focusing after pressure is applied between two points, with a critical width proportional to the length. Additionally, a spring network model is used to explore the thick sheet limit and validate the scaling behavior of the transition under the thin sheet limit.
Article
Physics, Fluids & Plasmas
Loic Tadrist, Tristan Gilet, Peter Schlagheck, John W. M. Bush
Article
Sport Sciences
Loic Tadrist, Naresh Sampara, Intesaaf Ashraf, Thomas Andrianne
SPORTS ENGINEERING
(2020)
Article
Chemistry, Physical
Antonio Iazzolino, Youness Tourtit, Adam Chafai, Tristan Gilet, Pierre Lambert, Loic Tadrist
Article
Physics, Fluids & Plasmas
Thomas Barois, Jean-Francois Boudet, Nicolas Lanchon, Juho S. Lintuvuori, Hamid Kellay
