Article
Chemistry, Multidisciplinary
Hanlin Zhu, Yuan Wang, Yangwen Ge, Yan Zhao, Chao Jiang
Summary: This study proposes a method that integrates traditional kirigami art and advanced mechanical assembly to achieve complex shape morphing and precise magnetization programming. The method enables the fabrication of multi-layered structures and face-like shapes with different expressions. Furthermore, a biomimetic soft crawling robot with significant obstacle surmounting ability is created.
Article
Multidisciplinary Sciences
Melissa R. Requist, Tim Rolvien, Alexej Barg, Amy L. Lenz
Summary: This study used quantitative micro-CT imaging to examine the dimensions, distance maps, and curvature of the four articular surfaces in the first and second tarsometatarsal joints. The results showed that the cuneiforms have larger articular surfaces than the metatarsals, and defined the generally tall and narrow articular surfaces seen in these joints. These findings are valuable for further understanding the surgical anatomy in this poorly understood region of the foot.
SCIENTIFIC REPORTS
(2023)
Article
Mechanics
Marco Riva, Alessandro Airoldi, Tommaso Turconi, Pietro Ballarin, Matteo Boiocchi, Luigi Bottasso
Summary: This paper investigates the use of corrugated composite laminates in designing flexible joints that can withstand axial load, transmit torque, and support significant bending deformations. The concept is numerically explored and applied to the design of a heavy-duty flexible joint for rotorcraft. A manufacturing technique for producing axisymmetric corrugated laminates is developed and tested, validating the numerical predictions and confirming the quality of manufacturing. A complete prototype is designed, produced, and tested, demonstrating the ability to withstand design limit loads without damage development.
COMPOSITE STRUCTURES
(2023)
Article
Physics, Fluids & Plasmas
Gaetano Napoli, Luigi Vergori
Summary: The study investigates the temperature-induced isotropic-nematic phase transition on a spherical shell under the assumption of degenerate tangential anchoring within the framework of Landau-de Gennes theory. It finds the exact critical threshold value for the temperature and determines the nematic textures at the transition through weakly nonlinear analysis. The stability analysis shows that only the tetrahedral configuration is stable at the isotropic-nematic transition.
Article
Engineering, Civil
Tian-Wei Liu, Jiang-Bo Bai, Shao-Lin Li, Nicholas Fantuzzi
Summary: The research evaluates the tensile behavior and functional mechanisms of a new corrugated flexible composite skin using analytical, experimental, and numerical simulation methods. Geometric parameters are found to be an important factor affecting the tensile behavior of the composite skin.
ENGINEERING STRUCTURES
(2023)
Article
Mathematics
Ahmad T. Ali
Summary: In this article, we classify developable surfaces in three-dimensional Euclidean space R-3 that are foliated by general ellipses. We prove that a surface has constant Gaussian curvature (CGC) and is foliated by general ellipses if and only if it is developable, meaning that the Gaussian curvature G vanishes everywhere. We characterize all developable surfaces that are foliated by general ellipses, including conical surfaces and surfaces generated by special base curves.
Article
Engineering, Electrical & Electronic
Xianyu Ge, Jieqing Tan, Li Zhang, Jing Liu, Dandan Hu
Summary: This paper introduces a blind image deblurring method utilizing Gaussian curvature and L-0 norm regularization. By combining these, sharp edges are preserved and detrimental structures and noises are removed in gradual steps, leading to accurate blur kernel estimation and state-of-the-art deblurring results.
SIGNAL PROCESSING-IMAGE COMMUNICATION
(2022)
Article
Engineering, Multidisciplinary
R. Jini Raj, J. Bruce Ralphin Rose, A. Vasudevan
Summary: This article proposes a bio-inspired active camber morphing technique to enhance the aerodynamic performance of MAVs and UAVs. It introduces a Fish Bone Active Camber (FishBAC) corrugated rib design concept for a UAV. The rib geometry is analyzed using ANSYS FEA module and the CFD simulation is conducted to evaluate the aerodynamic performance.
JOURNAL OF BIONIC ENGINEERING
(2023)
Article
Engineering, Mechanical
Ting Dong, Wei Zhang, Mingming Dong
Summary: This paper elaborates on a novel morphing airfoil based on a four-corner simply supported bistable composite laminated shell. The dynamic equations concerning the dynamic snap-through and nonlinear dynamics of the airfoil are elucidated using Hamilton's principle. The study reveals various characteristics of the airfoil, such as snap-through, equilibrium states, aerodynamic coefficients, and different types of oscillations and resonances. The influence of the negative stiffness system offered by the bistable composite laminated shell on the nonlinear effect of the amplitude-frequency response curves is also discussed. This study supports the development of aircraft morphing assemblies.
NONLINEAR DYNAMICS
(2023)
Article
Engineering, Aerospace
A. Airoldi, D. Rigamonti, G. Sala, P. Bettini, E. Villa, A. Nespoli
Summary: This paper introduces the design, manufacturing, and experimental assessment of a morphing element composed of a composite corrugated panel with a diffused actuation system based on SMA actuators. System performance is predicted through analytical model and finite element analyses, which are validated by experimental results. The concept proposed shows potential for developing corrugated panels with high stiffness and strength properties that can be contracted in a predefined direction.
AERONAUTICAL JOURNAL
(2021)
Article
Mathematics, Applied
Nural Yuksel, Burcin Saltik
Summary: If the arc length and intrinsic curvature of a curve or surface are kept constant, it is considered to be inextensible. Inextensible curve and surface flows are characterized by the absence of motion-induced strain energy. This paper studies inextensible tangential, normal, and binormal ruled surfaces generated by a curve with constant torsion, known as a Salkowski curve. It investigates whether these surfaces are minimal or developable and proves theorems related to inextensible ruled surfaces in three-dimensional Euclidean space.
Article
Physics, Multidisciplinary
Nnamdi Fidelis Okechi, Saleem Asghar
Summary: The study models magnetohydrodynamic flow through a corrugated curved channel and finds that corrugations inevitably decrease the flow rate. It shows that increasing the Hartmann number reduces the effect of corrugations on the flow rate.
CHINESE JOURNAL OF PHYSICS
(2021)
Article
Engineering, Aerospace
K. Dhileep, D. Kumar, P. N. Gautham Vigneswar, P. Soni, S. Ghosh, S. Faruque Ali, A. Arockiarajan
Summary: The study of camber morphing aerofoils reveals that morphing can enhance aerodynamic efficiency and endurance at moderate to high lift requirements. The optimal morphing angle increases with increasing lift demand, and there exists an optimum morphing angle for maximizing aerodynamic efficiency at a fixed angle of attack.
AERONAUTICAL JOURNAL
(2022)
Article
Multidisciplinary Sciences
Semra Kaya Nurkan, Ibrahim Gurgil
Summary: In this paper, we investigated surfaces with constant negative Gaussian curvature in the simply isotropic 3-Space. We studied the isotropic II-flat, isotropic minimal and isotropic II-minimal, the constant second Gaussian curvature, and the constant mean curvature of surfaces with constant negative curvature (SCNC). Surfaces with symmetry were obtained when the mean curvatures were equal. Furthermore, we investigated the constant Casorati, the tangential and the amalgamatic curvatures of SCNC.
Article
Engineering, Aerospace
Kensuke Soneda, Natsuki Tsushima, Tomohiro Yokozeki, Taro Imamura
Summary: This paper investigates the aeroservoelastic characteristics of a morphing control surface with corrugated structures. By analyzing the aeroelastic response of the corrugated morphing control surface and integrating a classic LQR control technique, this study provides important insights into designing a morphing control surface with flexible structures such as corrugated structures.
INTERNATIONAL JOURNAL OF AERONAUTICAL AND SPACE SCIENCES
(2022)
Article
Instruments & Instrumentation
Pooya Sareh, Simon D. Guest
SMART MATERIALS AND STRUCTURES
(2015)
Article
Mechanics
Patrick W. Fowler, Simon D. Guest, Bernd Schulze
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2016)
Article
Mechanics
Simon D. Guest, Patrick W. Fowler, Bernd Schulze
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2018)
Article
Materials Science, Multidisciplinary
K. A. Seffen, B. Wang, S. D. Guest
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2019)
Article
Multidisciplinary Sciences
Sabine C. Fischer, Guy B. Blanchard, Julia Duque, Richard J. Adams, Alfonso Martinez Arias, Simon D. Guest, Nicole Gorfinkiel
Article
Engineering, Mechanical
Mark Schenk, Simon D. Guest
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2014)
Article
Engineering, Mechanical
Andrew D. Viquerat, Simon D. Guest
JOURNAL OF MECHANISMS AND ROBOTICS-TRANSACTIONS OF THE ASME
(2014)
Article
Multidisciplinary Sciences
Patrick W. Fowler, Simon D. Guest, Tibor Tarnai
Article
Physics, Multidisciplinary
Xinyu Wang, Simon D. Guest, Randall D. Kamien
Article
Multidisciplinary Sciences
Zeyuan He, Simon D. Guest
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2020)
Article
Computer Science, Interdisciplinary Applications
Patrick W. Fowler, Simon D. Guest, John C. Owen
Summary: The study investigates the balance of freedoms and constraints in point-line and point-line-plane frameworks in CAD, presenting general symmetry-extended counting equations to strengthen condition on dimensioning of CAD drawings. Importation of a physical point of view reveals hidden freedoms and redundancies in CAD systems, while pointing out that point-group symmetry is not a perfect solution.
JOURNAL OF COMPUTATIONAL DESIGN AND ENGINEERING
(2021)
Article
Multidisciplinary Sciences
Zeyuan He, Simon D. Guest
Summary: This article examines rigid origami from the perspective of rigidity theory, defining first- and second-order rigidity and discussing static rigidity and prestress stability. The hierarchical relation among these local rigidities is shown through examples, and a new interpretation of internal force and geometric error associated with energy is provided.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2022)
Article
Multidisciplinary Sciences
Tibor Tarnai, Patrick W. Fowler, Simon D. Guest, Florian Kovacs
Summary: There is a growing interest in two-dimensional and quasi-two-dimensional materials and metamaterials in various fields including chemistry, physics and engineering. Some applications of these materials are driven by their potential auxetic properties. This study focuses on hinged frameworks based on Archimedean tilings of the plane, and identifies several equiauxetic frameworks.
Article
Physics, Applied
Andrea Micheletti, Filipe A. dos Santos, Simon D. Guest
Summary: This paper presents reduced-order analytical models for describing the prestrain-induced bistable effect in tensegrity units. Closed-form expressions of the critical prestrain are derived, which depend only on the geometry of the units. The predictions of the models are verified through numerical simulations and physical models. The proposed tensegrity units can be assembled into one-dimensional metamaterials with tailorable nonlinear features.
APPLIED PHYSICS LETTERS
(2023)
Article
Mechanics
Bernd Schulze, Patrick W. Fowler, Simon D. Guest
Summary: We propose symmetry-extended counting rules for the mobility of plate-bar frameworks with non-trivial point-group symmetry. We also derive necessary conditions for isostaticity of symmetric rod-bar frameworks in three-dimensional space. However, establishing sufficient conditions for isostaticity will require further development. Additionally, we establish a symmetry-extended counting rule for rod-clamp frameworks and demonstrate its utility in detecting mechanisms and states of self-stress in linear pentapods.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2023)
Article
Mechanics
Zhiqiang Meng, Xu Gao, Hujie Yan, Mingchao Liu, Huijie Cao, Tie Mei, Chang Qing Chen
Summary: This paper presents a cage-shaped, self-folding mechanical metamaterial that exhibits multiple deformation modes and has tunable mechanical properties, providing multifunctional applications in various fields.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Hasan Murat Oztemiz, Semsettin Temiz
Summary: Sandwich panel composites have various applications and their mechanical behavior and performance depend on material properties and geometry. The load-carrying capacity of S-core composite sandwich panels increases with the increase of the core wall thickness, but decreases with the increase of the core height.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Yang Sun, Wei Zhang, Weipeng Hu, Mabao Liu
Summary: The study presents a novel computational framework to investigate the effect of graphene percolation network on the strength-ductility of graphene/metal composites. It utilizes the Cauchy's probabilistic model, the field fluctuation method, and the irreversible thermodynamics principle.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Elaheh Kazemi-Khasragh, Juan P. Fernandez Blazquez, David Garoz Gomez, Carlos Gonzalez, Maciej Haranczyk
Summary: This study explores group interaction modelling (GIM) and machine learning (ML) approaches for predicting thermal and mechanical properties of polymers. ML approach offers more reliable predictions compared to GIM, which is highly dependent on the accuracy of input parameters.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Yafei Yin, Shaotong Dong, Dong Wu, Min Li, Yuhang Li
Summary: This paper investigates a bending-induced instability in sandwiched composite structures, and establishes a phase diagram to predict its characteristics. The results are of great significance in understanding the physical mechanisms of bending instability and providing design guidelines for practical applications.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Dhairya R. Vyas, Sharen J. Cummins, Gary W. Delaney, Murray Rudman, Devang V. Khakhar
Summary: In this study, multiple collisions of granules on a substrate are analyzed using Collisional Smooth Particle Hydrodynamics (CSPH) to understand the influence of impact-induced deformation on subsequent collision dynamics. It is found that the collision dynamics are dependent on the impact location and the deformation caused by preceding impacts. The accuracy of three theoretical models is also evaluated by comparing their predictions with CSPH results, and it is discovered that these models are only useful for predicting collisions at the same location repeatedly.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Sneha B. Cheryala, Chandra S. Yerramalli
Summary: The effect of hybridization on the growth of interface crack along the fiber is predicted. The study shows an enhancement in the compressive splitting strength with hybridization due to the lateral confinement effect on the interfacial crack.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Xiang-Nan Li, Xiao-Bao Zuo, Liang Li, Jing-Han Liu
Summary: A multiscale mechanical model is proposed to quantitatively describe the macro-mechanical behavior of fiber reinforced concrete (FRC) based on its multiscale material compositions. The model establishes the stiffness and strength equations for each scale of FRC and demonstrates the influence of steel fiber parameters on the mechanical properties of FRC.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Vicente Ramirez-Luis, Hilario Hernandez-Moreno, Orlando Susarrey-Huerta
Summary: In this paper, a Multicell Thin-walled Method is developed for studying the stress distributions in multimaterial beams. This method accurately obtains complex stress fields while reducing the solution time and computational cost. Validation with the finite element method confirms the accuracy of the proposed method.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Yanfeng Zheng, Siyuan Li, Jingyao Zhang, Yaozhi Luo
Summary: This study proposes an enhanced simplified model based on finite particle method (FPM) to consider the link cross-sectional size and contact in Bennett linkages. The model introduces virtual beams and contact forces to accurately simulate the real-world behavior of Bennett linkages. The proposed method is effective for dynamic analysis of large-scale deployable Bennett linkages and shows great potential.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Viktoriya Pasternak, Heorhiy Sulym, Iaroslav M. Pasternak
Summary: This paper investigates anisotropic elastic, magnetoelectroelastic, and quasicrystal solids and presents their equations of time-harmonic motion and constitutive relations in a compact and unified form. A matrix approach is proposed to derive the 3D time-harmonic Green's functions for these materials. The effects of phason field dynamics on the phonon oscillations in quasicrystals are studied in detail. The paper provides a strict proof that the eigenvalues of the time-harmonic magnetoelectroelaticity problem are all positive. It also demonstrates the application of the obtained time-harmonic Green's functions in solving boundary value problems for these materials using the derived boundary integral equations.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Jan Tomec, Gordan Jelenic
Summary: This paper investigates the relationship between different formulations and contact-force models in beam-to-beam contact mechanics. It specifically addresses the recently developed mortar method and develops its variant based on the penalty method. The developed elements are tested using the same examples to provide an objective comparison in terms of robustness and computational cost.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Paulo Teixeira Goncalves, Albertino Arteiro, Nuno Rocha, Fermin Otero
Summary: This work presents a novel formulation of a 3D smeared crack model for unidirectional fiber-reinforced polymer composites based on a stress invariant approach for transverse yielding and failure initiation. The performance of the model is evaluated using monotonic and non-monotonic damage evolution, verified with single element tests and compared with experimental results.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Hanbin Yin, Yinji Ma, Xue Feng
Summary: This paper investigates the peeling behavior of a viscoelastic film bonded to a rigid substrate and establishes a theoretical peeling model. The study reveals three typical relationships between the peeling force and peeling velocity, which depend on the viscous dissipation within the film and the rate-dependent adhesion at the interface. Additionally, factors such as film thickness, interfacial toughness, and interfacial strength are identified as influencing the steady-state peeling force.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Peter Noe Poulsen, John Forbes Olesen
Summary: Finite Element Limit Analysis (FELA) is increasingly used to calculate the ultimate bearing capacity of structures made of ductile materials. This study presents a consistent and general weak formulation based on virtual work for both the lower and upper bound problem, ensuring uniqueness of the optimal solution. A plane element with linear stress variation and quadratic displacement field is introduced, showing good results for load level, stress distribution, and collapse mechanism even for coarse meshes in verification and reinforced concrete examples.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
