Article
Materials Science, Textiles
Yujing Zhang, Zhuo Meng, Chengjie Du, Linlin Yao, Yize Sun
Summary: A mathematical model for ropes with regular braided structures was developed in this study, revealing that uneven stress distributions in different strands may lead to mechanical failure. Various strand parameters were compared to ensure the reliability of braided ropes in different applications.
JOURNAL OF ENGINEERED FIBERS AND FABRICS
(2021)
Article
Materials Science, Composites
Ghazal Ghamkhar, Majid Safar Johari, Hossein Hosseini Toudeshky, Mahdi Bodaghi
Summary: Braiding is a versatile and cost-effective method for generating various composite structures. This research develops a theoretical model to accurately predict the tensile modulus of braided structures, which is validated through experiments. The experimental results highlight the importance of axial yarn presence and the effect of high-performance yarns on the tensile properties of braided structures.
POLYMER COMPOSITES
(2022)
Article
Mechanics
Luca Lanzoni, Angelo Marcello Tarantino
Summary: The application of large twistings to a thin rope is known to lead to the formation and evolution of an intermediate cross kink. By using classical linear elastic structural mechanics, the branched equilibrium path, which is characterized by increasing torsional stiffness, has been obtained to describe the formation of the kink. Some energy considerations have also been formulated to explain why the rope moves along the branched path and generates the cross kink.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2022)
Article
Engineering, Mechanical
Haiyu Gu, Haibo Gao, Cheng Wei, Zhuoran Huang
Summary: This study designs a RDSM prototype with 16 DOFs and establishes a nonlinear rope-hole model, proposing an improved kinematic model and controller. Experimental results demonstrate that the control precision of the RDSM can be significantly improved with rope-hole compensation, reducing the end position error from centimeter to millimeter level and improving the end attitude error by about 60%.
MECHANISM AND MACHINE THEORY
(2023)
Article
Automation & Control Systems
Sungkeun Yoo, Taegyun Kim, Myoungjae Seo, Joohyun Oh, Hwa Soo Kim, TaeWon Seo
Summary: This article introduces a novel dual-rope winch robot designed for building maintenance work on wall planes, featuring a dual-rope winch system and a thrust module. It proposes a feedforward control to predict and compensate for rope slip length and a proportional-integral controller for position error regulation. Experiments on a test bench show trajectory deviation within 0.5% of the target trajectory.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2021)
Article
Materials Science, Multidisciplinary
Nico Kirchner, Darragh Millar, Babatunde M. Ayeni, Adam Smith, Joost K. Slingerland, Frank Pollmann
Summary: Two-dimensional systems like quantum spin liquids or fractional quantum Hall systems exhibit anyonic excitations with more general statistics than bosons or fermions. Simulating these anyonic systems is challenging, even for non-interacting anyons. In this study, we propose an algorithm derived from low energy topological quantum field theory to simulate anyonic tight-binding Hamiltonians on two-dimensional lattices. Using this algorithm, we investigate the energy level spacing statistics for different types of anyons and observe level repulsion for free semions, Fibonacci anyons, and Ising anyons. We also simulate nonequilibrium quench dynamics and find that the density distribution becomes homogeneous over time, indicating thermalization.
Article
Acoustics
Ning Zhang, Guohua Cao, Zhencai Zhu, Ke Wang, Lu Yan
Summary: Mine friction hoisting system is a multi-body system consisting of traction sheave, conveyance, hoisting rope, and balance rope. The hoisting rope experiences large amplitude elastic vibration and tension fluctuation during hoisting movement due to its large-scale and flexible tension. The balance rope undergoes significant curvature changes, large displacement, and large deformation due to its small tension amplitude and bending modulus. A coupling modeling method of the variable-length hoisting rope with the variable-curvature balance rope is proposed, and its correctness is verified through experiment and theoretical simulation. The nonlinear coupling dynamic behaviors of the hoisting rope and balance rope in an ultra-kilometer-deep well are studied, revealing non-stationary phenomena and large bending deformation when transient resonance occurs.
JOURNAL OF SOUND AND VIBRATION
(2023)
Article
Biophysics
Hai-Chao Han, Qin Liu, Seungik Baek
Summary: This study developed a computational model to simulate stress-induced growth and remodeling of blood vessels under axial twisting. The results showed that arterial wall thickness, mass, and twisting torque gradually increase towards a new steady state, while stress and mass exhibit different behaviors in different fiber families.
JOURNAL OF BIOMECHANICS
(2022)
Article
Physics, Multidisciplinary
T. K. Kassenova, P. Yu Tsyba, O. Razina, R. Myrzakulov
Summary: This work examines the construction of a representation of braid group generators from vertex models with N-states, which offers a valuable approach for studying knot invariants. An algebraic formula is proposed to calculate the knot invariant when the knot components have different spins. The study presents a procedure for obtaining braid generator representations from three-partite vertex models and explores the invariant of multi-colored linked knots using these representations.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Davide Pellecchia, Nicolo Vaiana, Mariacristina Spizzuoco, Giorgio Serino, Luciano Rosati
Summary: This paper describes an experimental campaign that aims to study the dynamic response of four different helical Wire Rope Isolators (WRIs) loaded along the axial direction. A total of seventy-one tests were conducted with ten cycles of sinusoidal displacement as input to each of them. The dynamic response of the WRIs was analyzed by varying input properties and simulated using a recently developed hysteretic model derived from a new class of uniaxial phenomenological models. The influence of axial preload and wire rope diameter on the dynamic behavior of the tested WRIs is also discussed, and a close agreement between predicted hysteresis loops and experimental ones has been achieved.
MATERIALS & DESIGN
(2023)
Article
Engineering, Mechanical
KyungUk Lee, Sahoon Ahn, Dong-geun Hyun, TaeWon Seo
Summary: In this study, a method for predicting the position of a load suspended on a rope was developed and verified by modeling the viscoelastic behavior of the rope. Experimental results showed that the Burgers model and Kelvin-Voigt model achieved mean errors of 4.3% and 1.09% in position prediction, respectively.
MECHANISM AND MACHINE THEORY
(2023)
Article
Geosciences, Multidisciplinary
H. -W. Wang, B. -B. Tang, W. Y. Li, Y. -C. Zhang, D. B. Graham, Y. V. Khotyaintsev, C. -H. Gao, X. -C. Guo, C. Wang
Summary: In this study, detailed electron dynamics in strong guide-field reconnection are investigated. Observations show the presence of a large parallel electric field, with electrons being accelerated or decelerated depending on their direction of entry. We propose that electron beta is an important parameter in guide-field reconnection.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Mu-Qing Niu, Li-Qun Chen
Summary: The research investigates the characteristics of a nonlinear vibration isolator with a NiTiNOL wire rope, showing different vibration properties by introducing different constraints and models, and elaborating on its superior vibration isolation performance compared to isolators with steel wire rope.
APPLIED SCIENCES-BASEL
(2021)
Article
Physics, Particles & Fields
S. K. Maurya, Abdelghani Errehymy, M. Govender, G. Mustafa, Nuha Al-Harbi, Abdel-Haleem Abdel-Aty
Summary: In this paper, an anisotropic solution for static and spherically symmetric self-gravitating systems is presented by demanding the vanishing of the complexity factor along with the isotropization technique through the gravitational decoupling approach in f (J)-gravity theory. Two new classes of stellar solutions are obtained using the Krori-Barua ansatz: the minimally deformed anisotropic solution and the isotropic solution via gravitational decoupling. Regularity, causality, and stability conditions are satisfied by both classes of solutions. The effect of the decoupling constant and surface density on predicted radii for some known compact objects is also determined.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Multidisciplinary Sciences
Bogdan Chuzhinov, Andrey Vesnin
Summary: This study examines the representations of the flat virtual braid group FVBn on n>=2 strands, and establishes that these representations do not preserve the forbidden relations between classical and virtual generators. It also proves the conditions of faithfulness for these representations and discovers that the kernel contains a free group of rank two for n >= 3.
Article
Engineering, Manufacturing
Mael Arhant, Eric Lolive, Thomas Bonnemains, Peter Davies
Summary: It was found in the study that carbon/polyamide 6 thermoplastic composites subjected to wet aging exhibited a significant decrease in fracture toughness, leading to a transition from ductile to brittle behavior.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Engineering, Ocean
Cedric Bain, Yann Marco, Peter Davies, Guilhem Bles, Thibault Reinhart, Pierre-Antoine Albouy
Summary: The low friction coefficient of HMPE fibers has both advantages and disadvantages. A recent innovation in sailboat pulleys utilized this property. During the study, a phenomenon called "lustering" was observed, which results from the compaction of HMPE fiber filaments in the rope loop.
APPLIED OCEAN RESEARCH
(2022)
Article
Engineering, Multidisciplinary
Q. Dezulier, A. Clement, P. Davies, M. Arhant, B. Flageul, F. Jacquemin
Summary: This study investigates the influence of long-term immersion on the hygro-elastic and hygro-viscoelastic behavior of epoxy resin samples through experimental tests and numerical simulations. A model is proposed to simulate the hygro-viscoelastic behavior of the material, and good agreement between experimental and numerical results is observed.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Materials Science, Characterization & Testing
M. Le Gall, Z. Niu, M. Curto, A. Catarino, E. Demeyer, C. Jiang, H. Dhakal, G. Everaert, P. Davies
Summary: This study aimed to assess the suitability of a bio-based self-reinforced polylactic acid (SRPLA) for structures deployed in the marine environment. Durability during service and microplastic formation were examined as key criteria. The results showed that composite strength was completely degraded after seawater ageing and short-term UV radiation did not accelerate microplastic formation in SRPLA. The study discusses the potential for SRPLA to be a promising material for sustainable marine applications.
Article
Materials Science, Textiles
Cedric Bain, Peter Davies, Luc Riou, Yann Marco, Guilhem Bles, Guillaume Damblans
Summary: Friction is a key factor in rope manufacturing and affects the mechanical behavior of fiber assemblies. Understanding and evaluating the friction coefficient between fibers is essential for developing numerical rope models. The angle between fibers and the direction of movement impact the friction coefficient significantly. Lower friction leads to higher abrasion resistance and longer lifetime.
JOURNAL OF THE TEXTILE INSTITUTE
(2023)
Article
Engineering, Marine
Laure Civier, Yoan Chevillotte, Guilhem Bles, Frederic Montel, Peter Davies, Yann Marco
Summary: This paper investigates the long term creep behavior of polyamide 6 ropes in water and performs a kinetic study on creep and recovery. The results show that short term creep tests can reasonably predict long term creep strain. Additionally, a latch-based Weibull model is proposed to describe and predict the creep and recovery response of polyamide 6.
Article
Multidisciplinary Sciences
Quentin Dezulier, Alexandre Clement, Peter Davies, Frederic Jacquemin, Mael Arhant, Benjamin Flageul
Summary: This paper presents a study on the long-term behavior of carbon/epoxy composites, examining the interactions between aging in water and constant mechanical loads through experimental and modeling approaches. The results show that a four-parameter Burgers model provides a good fit to the experimental data, indicating the significant impact of water diffusion on the viscoelastic behavior of the materials.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Article
Engineering, Mechanical
Alban Robin, Peter Davies, Mael Arhant, Sebastian Le Jeune, Nicolas Lacotte, Eliaz Morineau, Fanny Ioos, Pascal Dourlen, Raphael Cairo
Summary: This study evaluates the performance of alternative sandwich materials with reduced environmental impact under loading conditions relevant to boat design. Compared to traditional PVC foam sandwich materials, flax and bamboo composite faced PET foam sandwich materials have lower flexural stiffness and damage initiation levels, but they show promising support for impact energy levels that could be further improved with facing enhancements.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2023)
Article
Environmental Sciences
Louis Le Gue, Peter Davies, Mael Arhant, Benoit Vincent, Erwan Tanguy
Summary: This paper evaluates the use of PBS/PBAT biodegradable rope to minimize the environmental impact of lost fishing gear in the sea. It studies the degradation mechanisms of the rope and its mono-filaments when exposed to seawater over a long period of time. Mono-filaments were immersed in seawater for up to 18 months, and rope samples were also immersed to study aging at a larger scale and assess a modeling tool's ability to predict the state of the rope. The study finds that while there was no loss of properties at low temperatures, biodegradation and hydrolysis processes were observed at higher temperatures, causing faster loss of properties in the mono-filament compared to the rope. The modeling tool's predictions were conservative due to severe mechanical test conditions and a degradation gradient within the rope structure.
MARINE POLLUTION BULLETIN
(2023)
Article
Engineering, Marine
H. Thuilliez, P. Davies, P. Cartraud, M. Feuvrie, T. Soulard
Summary: This article presents a new set of experimental data on nylon ropes, focusing on the dynamic stiffness of nylon mooring lines and their evaluation under realistic conditions. The study also examines the accumulated strain after successive tests. The results show that stiffness is nonlinear with respect to both mean tension and amplitude.
Article
Materials Science, Composites
A. Robin, M. Arhant, P. Davies, S. Lejeune, E. Lolive, T. Bonnemains, B. Habert
Summary: This paper presents an approach that considers aging in the design of marine structures. It includes physical aging and seawater saturation, with the latter being more severe and resulting in up to 30% loss in properties after aging. In-plane and out-of-plane properties of a carbon/epoxy composite were generated and used to model the response of a flexural beam under mixed shear/bending load. The model and test results show reasonable agreement, indicating the strong influence of seawater conditioning on composite performance, with a reduction in strength of around 35% after aging. This approach can be applied to account for seawater aging in composite structure design.
COMPOSITES PART C: OPEN ACCESS
(2023)
Article
Materials Science, Composites
P. Davies, Z. Niu, A. I. Catarino, Y. De Witte, H. Dhakal, C. H. Park, E. Demeyer
Summary: Poly(lactic acid) is a compostable thermoplastic that can be improved by adding compostable flax fibres. Recycling the composite reduces waste and the need for raw materials, but the effects of recycling and seawater exposure on the properties of flax-PLA composites are not well understood. This study explores the changes in properties and toxicity of these materials.
COMPOSITES PART C: OPEN ACCESS
(2023)
Article
Materials Science, Composites
Peter Davies, Mael Arhant, Erwan Grossmann
Summary: This paper presents the experimental study of the mechanical behavior of flax fiber reinforced acrylic composites in seawater. The results show a significant drop in stiffness and a smaller drop in strength for seawater saturated specimens. The relevance of immersion tests is discussed and an alternative unifacial exposure test is recommended.
COMPOSITES PART C: OPEN ACCESS
(2022)
Review
Engineering, Multidisciplinary
Emanuele Quaranta, Peter Davies
Summary: The hydropower sector is undergoing technological developments, with the application of novel materials to improve performance and sustainability. Composite materials, polymers, superhydrophobic materials, and novel bearing materials are highlighted for their potential in reducing energy consumption and wear.
Review
Chemistry, Multidisciplinary
Marco Curto, Maelenn Le Gall, Ana Isabel Catarino, Zhiyue Niu, Peter Davies, Gert Everaert, Hom N. Dhakal
Summary: The article discusses the importance of using sustainable and renewable biobased composite materials in automotive, aerospace, and marine applications, as well as the long-term durability and related degradation mechanisms of these materials in marine environments.
Article
Engineering, Ocean
Canjun Yang, Dingze Wu, Puzhe Zhou, Shuyang Ma, Rui Zhou, Xin Zhang, Yang Zhang, Qingchao Xia, Zeliang Wu
Summary: The Argo Global Ocean Observing Network is the preeminent ocean observation network worldwide, but its buoys fail to complete long-term observations in designated sea areas due to their lack of lateral movement. To solve this problem, a portable underwater profiler (PUP) that combines buoy and underwater glider functionalities was developed. The PUP is lightweight, allows for rapid deployment, and enables continuous observation.
APPLIED OCEAN RESEARCH
(2024)
Article
Engineering, Ocean
Knut Andreas Kvale, Bernt Leira, Ole Oiseth
Summary: As future floating bridges become longer, the chance of encountering significant inhomogeneous wave conditions increases. This paper presents an approach to model these conditions using generalized harmonic decomposition and applies it to a conceptual floating bridge model in Norway. The paper focuses on frequency-domain simulation and highlights the importance of considering the coherency in swell sea conditions.
APPLIED OCEAN RESEARCH
(2024)
