Article
Engineering, Multidisciplinary
Kai Li
Summary: A numerical model is developed to calculate the rotation angle and vertical displacement of an electrostatically driven tilting micromirror, considering the combined effect of electrothermomechanical coupling and torsion-bending-stretching coupling. An analytical model is also developed to determine the critical state and calculate the critical driving voltage, angle, and displacement. The relationship between rotation angle and vertical displacement is found and optimized to enhance the mirror's performance.
APPLIED MATHEMATICAL MODELLING
(2023)
Article
Instruments & Instrumentation
Huirong Zhang, Leian Zhang, Yuanbo Wang, Xiaohui Yang, Rujun Song, Wentao Sui
Summary: This paper presents an asymmetric magnetic coupling piezoelectric energy harvester based on galloping to scavenge low-speed wind. The mathematical model of the harvester is constructed and verified through experiments. The results show that the asymmetric harvester has a lower threshold wind speed and lower power and voltage output compared to the traditional galloping piezoelectric energy harvester. The potential energy of the harvesting system at different magnet distances is analyzed, and the harvester is found to operate in monostable and bistable states.
SMART MATERIALS AND STRUCTURES
(2022)
Article
Engineering, Aerospace
Cesare Patuelli, Enrico Cestino, Giacomo Frulla
Summary: This research introduces a new beam finite element model that can predict the static and dynamic behavior of beam structures with bending-torsion coupling. The derived model establishes a relation between the bending and torsional nodal degree of freedom of a two node beam element. The equilibrium equations are derived neglecting non-linear terms, while the stiffness and mass matrices are derived using Galerkin's method. The model has been validated through numerical and experimental results, showing good agreement for static deformations, natural frequency prediction, and mode shape similarity.
Article
Chemistry, Multidisciplinary
Victor Roda-Casanova, Alvaro Zubizarreta-Macho, Francisco Sanchez-Marin, Oscar Alonso Ezpeleta, Alberto Albaladejo Martinez, Agustin Galparsoro Catalan
Summary: This study introduces an automated procedure for generating and analyzing finite element models of endodontic rotary files under bending and torsional conditions. Results showed that the maximum von Mises stress was near the clamped point in both bending and torsional analyses.
APPLIED SCIENCES-BASEL
(2021)
Article
Biotechnology & Applied Microbiology
Qiang Huang, CongMing Zhang, HuanAn Bai, Qian Wang, Zhong Li, Yao Lu, Teng Ma
Summary: The existing implants for fixation of femoral neck fractures have poor biomechanical stability, so the failure rate is high. We designed two modified intramedullary implants for treating unstable femoral neck fractures. The modified intramedullary implants exhibited the best biomechanical stability among the five implants included in this study.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2023)
Article
Computer Science, Interdisciplinary Applications
Simon Thel, Daniel Hahn, Matthias Haupt, Sebastian Heimbs
Summary: This research aims to maximize load alleviation in aircraft wings by exploiting the geometric nonlinearities of the inner wing structure. A topology optimization approach is proposed to find designs with the desired properties. The passive load alleviation is achieved through bending-torsion coupling, which reduces the aerodynamic forces. The proposed methodology has been successfully applied to two test cases, demonstrating its potential for designing new geometries with the desired nonlinear behavior.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2022)
Article
Engineering, Marine
Qiang Zhong, Deyu Wang
Summary: This paper numerically investigates the ultimate strength of sandwich box girders under vertical bending and torsion, finding that the designed sandwich box girders have a higher ultimate strength than the prototype stiffened box girder, with a maximum increase of 21.8% under sagging conditions. In addition, an increase in face plate thickness and a decrease in web plate thickness lead to an increase in warping stress in the sandwich box girders, resulting in a reduction in ultimate bearing capacity.
Article
Chemistry, Analytical
Benjamin Spetzler, Elizaveta V. Golubeva, Ron-Marco Friedrich, Sebastian Zabel, Christine Kirchhof, Dirk Meyners, Jeffrey McCord, Franz Faupel
Summary: A study on magnetoelectric thin-film cantilevers as magnetic field sensors revealed different performances in sensitivity and frequency change between torsion modes and bending modes. The delta-E effect of certain stiffness tensor components was found to significantly increase the magnetic sensitivity, but excitation of torsion modes diminished the gain in sensitivity. Insights were gained for the design of high-sensitivity delta-E effect sensors and frequency tunable devices.
Article
Materials Science, Multidisciplinary
R. Guillen-Rujano, F. Aviles, A. Vidal-Lesso, A. Hernandez-Perez
Summary: A new anticlastic bending solution for laminated composite plates and sandwich panels is developed using first-order shear deformation theory and the theorem of minimum potential energy. The proposed solution considers various factors, with good agreement observed for compliance measurements of orthotropic and isotropic plates. The finite element model also provides valuable insights into load distribution and behavior in different types of composite structures.
MECHANICS OF MATERIALS
(2021)
Article
Mathematics, Applied
Xiaokang Du, Yuanzhao Chen, Jing Zhang, Xian Guo, Liang Li, Dingguo Zhang
Summary: In this work, dynamic coupling modeling and analysis of rotating beams based on the nonlinear Green-Lagrangian strain are introduced. The proposed model includes more coupling terms for axial and transverse deformations by reserving the axial nonlinear strain. The finite element method and Lagrange's equations are used to obtain the discretized dynamic governing equations.
APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION
(2023)
Article
Engineering, Civil
Peiyan Wang, Yongshun Chen, Runa Pei, Chenchen Lian, Ke Zhang, Yinhua Zhou
Summary: This paper proposes a mathematical model to study the effect of different torsion-bending ratios on the buckling and failure loads of composite wing boxes under complex operating conditions. The study combines experiments and simulations to investigate the buckling and failure behavior of the wing box. The results show that the torsion-bending ratio has a significant impact on the loading form and failure distribution of the structure.
THIN-WALLED STRUCTURES
(2023)
Article
Mechanics
Jiawen Xu, Lijun Chang, Taiwei Chen, Tong Ren, Yan Zhang, Zhihua Cai
Summary: This study aims to explore a chain mail fabric with fast, reversible, and controllable stiffness adjustment. The fabric is made of three-dimensional single-cell particles and was printed using 3D printing technology with polyamide 12 material. A three-point bending test was conducted to investigate the mechanical tunability of the fabric, and the effects of pressure and particle structure were studied. The results show significant increases in bending modulus, energy absorption, and strength, providing new ideas for the development of adjustable structural fabrics.
COMPOSITE STRUCTURES
(2023)
Article
Construction & Building Technology
Taotao Zhang, Linda Wang, Wende Liu
Summary: A new type of piezoelectric energy harvester structure is proposed in this paper, which improves the energy harvesting efficiency through optimized design, elastic connection, and the combination of eccentric mass. The results show that reasonable resistance selection and frequency matching can significantly improve the energy harvesting effect, while improving the eccentric arrangement can optimize the frequency matching of the structure.
STRUCTURAL DESIGN OF TALL AND SPECIAL BUILDINGS
(2023)
Article
Materials Science, Multidisciplinary
Wentao Sui, Huirong Zhang, Chongqiu Yang, Dan Zhang, Rujun Song, Xiaohui Yang
Summary: This paper introduces a magnetically coupling bending-torsion piezoelectric energy harvester based on vortex-induced vibration from low-speed wind, which shows improved power output and bandwidth compared with nonmagnetic coupling harvesters. Factors such as cylinder length and diameter, piezoelectric beam width, wind speed, and load resistance were investigated for their effects on the harvester’s performance.
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
(2022)
Article
Chemistry, Physical
Cesare Patuelli, Enrico Cestino, Giacomo Frulla, Federico Valente
Summary: This research focuses on the application of a beam finite element to simulate bending-torsion coupling in box-beam structures with curvilinear stiffeners. The stiffener path is optimized to achieve the desired coupling effect, taking into account geometric constraints related to additive manufacturing production method. The results demonstrate that the beam finite element accurately represents the static behavior of beam structures with curvilinear stiffeners and shows the possibility to uncouple bending-torsion behavior by adjusting the stiffener orientation. Simulation of a laser powder bed fusion process opens new opportunities for stiffened panel manufacturing.
Article
Physics, Multidisciplinary
Sebastien Guilbaud, Laurence Salome, Nicolas Destainville, Manoel Manghi, Catherine Tardin
PHYSICAL REVIEW LETTERS
(2019)
Article
Polymer Science
Marius Socol, Hubert Ranchon, Bayan Chami, Antony Lesage, Jean-Marc Victor, Manoel Manghi, Aurelien Bancaud
Article
Biochemical Research Methods
Manoel Manghi, Nicolas Destainville, Annael Brunet
Article
Chemistry, Physical
Julie Cornet, Nicolas Destainville, Manoel Manghi
JOURNAL OF CHEMICAL PHYSICS
(2020)
Article
Chemistry, Physical
Manoel Manghi, John Palmeri, Francois Henn, Adrien Noury, Fabien Picaud, Guillaume Herlem, Vincent Jourdain
Summary: The field of ion transport through carbon nanotubes is characterized by varying reported values and uncertainties regarding channel and access resistances. By comparing experimental data with nanofluidic models, it is possible to determine the conditions under which different resistances predominate in CNTs. Most experimental conductance values can be explained by considering variations in slip length and surface charge density, but a few exceptionally high values cannot be accounted for even with extreme parameter values. Improving existing models and enhancing the statistical reliability of experimental data are important for the advancement of research in this field.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Alia Mejri, Kamel Mazouzi, Guillaume Herlem, Fabien Picaud, Theo Hennequin, John Palmeri, Manoel Manghi
Summary: Ultra-efficient transport of water and ions at the nanoscale is studied through molecular dynamics simulations. Carbon nanotubes are used as nanofluidic devices, and the transport of solvated ions inside the nanotubes is found to be dependent on the geometric parameters of the carbon structure and the water models used.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Biophysics
Julie Cornet, Pascal Preira, Laurence Salome, Frederic Daumas, Bernard Lagane, Nicolas Destainville, Manoel Manghi, Fabrice Dumas
Summary: In cell membranes, submicrometric nanodomains composed of proteins and lipids play important roles in specific functions. However, the detailed morphology of these nanodomains remains unknown. This study combines analytical calculations and Monte Carlo simulations to show that increasing protein concentration results in the elongation of membrane nanodomains. The findings suggest that protein abundance can modulate nanodomain shape and potentially impact their biological function.
BIOPHYSICAL JOURNAL
(2023)
Meeting Abstract
Biophysics
Julie Cornet, Matthieu Chavent, Manoel Manghi, Nicolas Destainville
BIOPHYSICAL JOURNAL
(2020)
Article
Physics, Fluids & Plasmas
Francois Sicard, Nicolas Destainville, Philippe Rousseau, Catherine Tardin, Manoel Manghi
Meeting Abstract
Biophysics
S. Guilbaud, L. Salome, N. Destainville, M. Manghi, C. Tardin
EUROPEAN BIOPHYSICS JOURNAL WITH BIOPHYSICS LETTERS
(2019)
Meeting Abstract
Biophysics
S. Guilbaud, L. Salome, N. Destainville, M. Manghi, C. Tardin
EUROPEAN BIOPHYSICS JOURNAL WITH BIOPHYSICS LETTERS
(2019)
Meeting Abstract
Biophysics
J. Cornet, M. Chavent, M. Manghi, N. Destainville
EUROPEAN BIOPHYSICS JOURNAL WITH BIOPHYSICS LETTERS
(2019)
Meeting Abstract
Biophysics
J. Cornet, M. Chavent, M. Manghi, N. Destainville
EUROPEAN BIOPHYSICS JOURNAL WITH BIOPHYSICS LETTERS
(2019)
Review
Biochemistry & Molecular Biology
Nicolas Destainville, Manoel Manghi, Julie Cornet
Article
Physics, Fluids & Plasmas
Theo Hennequin, Manoel Manghi, John Palmeri
Summary: The recent study on the dielectric constant of water confined in nanometric slit pores sheds light on the interplay between different physical mechanisms for ion partitioning in nanopores. The role of the Born contribution in inducing ionic liquid-vapor phase separation is explored, showing that the abrupt change in the dielectric contribution of the potential of mean force with Debye-Huckel screening parameters favors this transition. By establishing phase diagrams and monitoring osmotic pressure, the study reveals the competition between exclusion effects and electrostatic attraction in charged nanopores, providing insights for experiments and simulations on ionic transport through nanopores.
