Article
Engineering, Mechanical
Atteshamuddin S. Sayyad, Yuwaraj M. Ghugal
Summary: This paper presents higher order closed-formed analytical solutions for buckling analysis of functionally graded sandwich rectangular plates using a unified shear deformation theory. The study considers three-layered sandwich plates with functionally graded skins and isotropic core, and evaluates the governing equations using the principle of virtual work to obtain critical buckling load factors. Various parameters are considered in the numerical study to investigate the behavior of the plates under different conditions.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Mechanics
Supen Kumar Sah, Anup Ghosh
Summary: This article investigates the free vibration and buckling of multi-directional porous FGM sandwich plates, obtaining equilibrium equations based on sinusoidal shear deformation theory and using Navier's solution technique for simply supported cases. Different porous distribution models are considered for the FGM face sheets, and the influence of various factors on the natural frequency and critical buckling load of the sandwich plate is analyzed.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Aerospace
Yukang Yang, Bo Chen, Weiqi Lin, Yinghui Li, Youheng Dong
Summary: This paper investigates the thermal load on graphene-platelets-reinforced composites and analyzes the vibration and symmetric thermal buckling behaviors of an annular sandwich plate. The results show that adding graphene-platelets can increase the natural frequency but decrease the thermal buckling temperature, and the configuration of piezoelectric layers and distribution patterns of graphene-platelets have a significant influence on vibration and thermal buckling.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Mechanics
Krzysztof Magnucki, Ewa Magnucka-Blandzi
Summary: The paper presents the analytical model of sandwich structures, proposing a continuous variation of mechanical properties in the thickness direction of the structure wall and developing an individual nonlinear theory of deformation normal to the neutral surface. Using the principle of stationary potential energy, two differential equations of equilibrium for the plate are obtained and analytically solved, deriving the maximum deflection and critical loads of the example plates. The results of these analytical studies are presented in Figures and Tables.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Civil
Ali Alnujaie, Atteshamuddin S. Sayyad, Lazreg Hadji, Abdelouahe Tounsi
Summary: This article investigates the buckling and free vibration of multi-directional functionally graded material (FGM) sandwich plates. By considering the continuous variation of material properties in different directions, the buckling and vibration characteristics of multi-directional FGM sandwich plates are analyzed. The results show that multi-directional FGM structures outperform uni-directional graded structures.
STRUCTURAL ENGINEERING AND MECHANICS
(2022)
Article
Mechanics
Yanchun Zhai, Jiaxing Ma, Yangyang Yan, Qiang Li, Shaoqing Wang, Guanqin Wang
Summary: In this article, thermal buckling and free vibration of Composite Sandwich Curved Panels (CSCP) in a thermal environment are analyzed using Hamilton's principle and Navier method. The study examines the influence of structural parameters on Critical Buckling Temperature (CBT) and presents new insights into thermal buckling and free vibration of CSCP.
COMPOSITE STRUCTURES
(2021)
Article
Multidisciplinary Sciences
Nima Refahati, Thira Jearsiripongkul, Chanachai Thongchom, Peyman Roodgar Saffari, Pouyan Roodgar Saffari, Suraparb Keawsawasvong
Summary: This study provides a comprehensive investigation into the sound transmission characteristics of a double-walled sandwich magneto-electro-elastic cross-ply layered plate resting on viscoelastic medium in thermal environment. The governing equations are derived and solved to accurately estimate the sound transmission loss under various conditions.
SCIENTIFIC REPORTS
(2022)
Article
Mechanics
Michio Innami, Shinya Honda, Katsuhiko Sasaki, Yoshihiro Narita
Summary: An accurate and straightforward analytical method is proposed for the free vibration analysis of laminated composite rectangular plates with blended layers. The method is verified through numerical comparisons and tested in vibration optimization, showing that the introduction of blended layers is an effective approach to design the dynamic characteristics of laminated composite plates.
COMPOSITE STRUCTURES
(2021)
Article
Mathematics, Applied
C. Chu, M. S. H. Al-Furjan, R. Kolahchi, A. Farrokhian
Summary: In this research, a comprehensive frequency analysis is conducted for circular sandwich plates subjected to an in-plane thermal field in the pre- and post-buckling ranges. A sandwich system is fabricated using open-cell foam (OCF) core and laminated composite face sheets reinforced with graphene platelets based on functionally graded models (FG-GPLRC). The displacement field is determined using Reddy's third-order shear deformation theory due to the desired circular structure formed by thick layers. Nonlinear strain-displacement relations based on the von Karman model are employed to account for large deformations in the post-buckling situation. The Chebyshev collocation solution is utilized for obtaining the discrete form of equilibrium and dynamic equations. A displacement control iterative procedure is adopted to address the nonlinear equilibrium state of the system. The adjacent-equilibrium criterion is considered to identify the transition from small-amplitude vibrations to static paths. Novel results are presented to verify the influence of geometrical and physical characteristics on the post-buckling path and fundamental natural frequency of circular sandwich plates after validation studies with existing articles.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2023)
Article
Nanoscience & Nanotechnology
Saeed Kamarian, Jung-Il Song
Summary: The present study aims to develop an accurate analytical solution to assess the effects of embedding pre-strained shape memory alloy wires on the critical buckling temperatures of rectangular sandwich plates. The study also compares the effects of shape memory alloys with carbon nanotubes on the thermal buckling of sandwich plates. Additionally, the study investigates the thermal buckling of sandwich plates with advanced hybrid shape memory alloy/carbon nanotube/graphite fiber/epoxy composite face sheets, showing the potential for significant enhancement in critical buckling temperatures.
ADVANCES IN NANO RESEARCH
(2023)
Article
Mechanics
Mojtaba Farrokh, Mohammad Taheripur, Erasmo Carrera
Summary: This paper investigates the thermal buckling of metal-ceramic functionally graded plates, and formulates the problem using a higher-order plate theory and linearized buckling analysis method. The optimization results show that the degrees of freedom associated with the composition distribution have a significant influence on the critical buckling temperature of the plate.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Majid Afzali, Mojtaba Farrokh, Erasmo Carrera
Summary: This study numerically analyzes the thermal post-buckling response of rectangular functionally graded (FG) plates. An accurate numerical method is used to compute the temperature distribution across the thickness in a thermal environment. Geometrically nonlinear analysis is performed using the Carrera Unified Formulation (CUF) and the finite element method (FEM) based on large displacement assumption. The results show the influence of various parameters on the temperature-deflection path of FG plates and confirm the effectiveness of using CUF for thermal post-buckling analysis.
COMPOSITE STRUCTURES
(2023)
Article
Mathematics, Applied
Qiao Zhang, Yuxin Sun
Summary: This paper proposes a 3D Maltese cross metamaterial with negative Poisson's ratio and negative thermal expansion as the core layers in sandwich plates, aiming to investigate the relationship between the mechanical responses of sandwich composites and the metamaterial properties. The negative properties of the metamaterial are analytically derived based on energy conservation and validated using the finite element method. The results show that negative Poisson's ratio and negative thermal expansion can enhance the stiffness of sandwich structures, and the geometric parameters of the metamaterial significantly affect the thermal stress, natural frequency, and buckling load.
APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION
(2023)
Article
Engineering, Civil
Sundaramoorthy Rajasekaran, Hossein B. Khaniki, Mergen H. Ghayesh
Summary: This paper investigates the static, stability, and free vibration behavior of multi-layer multi-directional functionally graded sandwich thin rectangular plates under thermo-mechanical loadings. Various physical properties and boundary conditions are considered, and the temperature-position-dependent physical properties are obtained using the rule of mixture. The modified differential quadrature method is used to model different types of plates. The results suggest that this methodology is effective, simple, and accurate. The study also presents the first investigation of MDFG plates and layered composite structures under thermo-mechanical conditions, and discusses the advantages of using MDFG sandwich plates.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Civil
Abdeldjebbar Tounsi, Abdelmoumen Anis Bousahla, Saeed I. Tahir, Adda Hadj Mostefa, Fouad Bourada, Mohammed A. Al-Osta, Abdelouahed Tounsi
Summary: This paper investigates the free vibration of functionally graded material (FGM) sandwich plates supported by different boundary conditions and influenced by a three-parameter viscoelastic foundation and hygro-thermal changes. An efficient and simple four-variable integral higher-order shear deformation theory (HSDT) is employed to model the analytical solution of the considered problem. New results are presented in this paper showing the influences of different boundary conditions, hygro-thermal changes, viscoelastic parameters, vibration modes, material exponents, and geometric dimensions.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2023)
Article
Acoustics
Sandip Chajjed, Mohammad Khalil, Dominique Poirel, Chris Pettit, Abhijit Sarkar
Summary: This paper reports the generalization of the Bayesian formulation of the flutter margin method, which improves the predictive performance by incorporating the joint prior of aeroelastic modal parameters. The improved algorithm reduces uncertainties in predicting flutter speed and can cut cost by reducing the number of flight tests.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Pascal Zeise, Bernhard Schweizer
Summary: Air ring bearings are an improved version of classical air bearings, providing better damping behavior and allowing operation above the linear threshold speed of instability. However, there is a risk of dangerous vibrations in certain rotor systems, which can be addressed by considering ring tilting effects.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Zbynek Sika, Jan Krivosej, Tomas Vyhlidal
Summary: This paper presents a novel design of a compact six degrees of freedom active vibration absorber with six identical eigenfrequencies. The objective is to completely suppress the vibration of a machine structure with six motion components. By utilizing a Stewart platform structure equipped with six active legs, a spatial unifrequency absorber with six identical eigenfrequencies is achieved. The design is optimized using a correction feedback and active delayed resonator feedback.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Kai Li, Yufeng Liu, Yuntong Dai, Yong Yu
Summary: This paper presents a novel light-powered self-oscillating liquid crystal elastomer (LCE) bow that can self-oscillate continuously and periodically under steady illumination. The dynamics of the LCE bow are theoretically investigated and numerical calculations predict its motion regimes. The suggested LCE bow offers potential advantages in terms of simple structure, customizable size, flexible regulation, and easy assembly.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Carmelo Rosario Vindigni, Giuseppe Mantegna, Calogero Orlando, Andrea Alaimo
Summary: In this study, a simple adaptive flutter suppression system is designed to increase the operative speed range of a wing-aileron aeroelastic plant. The system achieves almost strictly passivity by using a parallel feed-forward compensator implementation and the controller parameters are optimized using a population decline swarm optimization algorithm. Numerical simulations prove the effectiveness of the proposed simple adaptive flutter suppression architecture in different flight scenarios.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Nicco Ulbricht, Alain Boldini, Peng Zhang, Maurizio Porfiri
Summary: The quantification of fluid-structure interactions in marine structures is crucial for their design and optimization. In this study, an analytical solution for the free vibration of a bidirectional composite in contact with a fluid is proposed. By imposing continuity conditions and boundary conditions, the coupled fluid-structure problem is solved and applied to sandwich structures in naval construction, offering insights into the effects of water on mode shapes and through-the-thickness profiles of displacement and stress.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Shahram Hadian Jazi, Mostafa Hadian, Keivan Torabi
Summary: Non-uniformity and damage are the main focus in studying vibrations of beam elements. An exact closed-form explicit solution for the transverse displacement of a nonuniform multi-cracked beam is introduced using generalized functions and distributional derivative concepts. By introducing non-dimensional parameters, the motion equation and its closed-form solution are obtained based on four fundamental functions. The impact of crack count, location, intensity, and boundary conditions on natural frequency and mode shape is evaluated through numerical study.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Eugenio Tramacere, Marius Pakstys, Renato Galluzzi, Nicola Amati, Andrea Tonoli, Torbjoern A. Lembke
Summary: This paper proposes the experimental stabilization of electrodynamic maglev systems by means of passive components, providing key technological support for the Hyperloop concept of high-speed and sustainable transportation.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Pengfei Deng, Xing Tan, He Li
Summary: In this paper, the authors improve the surface morphology method and study the bit-rock interaction model between the rock and the PDC bit, taking into account the impact of blade shape and cutter arrangement. They establish a dynamic model for a deep drilling system equipped with an arbitrary shape PDC bit and propose a stability prediction method. The results show that the shape of the blades and arrangement of the cutters on the PDC bit significantly affect the nonlinear vibration of the drilling system.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Salvador Rodriguez-Blanco, Javier Gonzalez-Monge, Carlos Martel
Summary: In modern LPT designs, the simultaneous presence of forced response and flutter in different operation regimes is unavoidable. Recent evidence suggests that the traditional linear superposition method may be overly conservative. This study examines the flutter and forced response interaction in a realistic low pressure turbine rotor and confirms that the actual response is much smaller than that predicted by linear superposition.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Kabilan Baskaran, Nur Syafiqah Jamaluddin, Alper Celik, Djamel Rezgui, Mahdi Azarpeyvand
Summary: This study investigates the impact of the number of blades on the aeroacoustic characteristics and aerodynamic performance of propellers used in urban air mobility vehicles. The results show that different blade numbers exhibit distinct noise levels, providing valuable insights for further research on propeller noise and aerodynamic performance.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Yongbo Peng, Peifang Sun
Summary: This study focuses on the reliability-based design optimization (RBDO) of the tuned mass-damper-inerter (TMDI) system under non-stationary excitations. The performance of the optimized TMDI system is evaluated using probability density evolution analysis. The results demonstrate the technical advantages of TMDI, including high vibration mitigation performance, considerable mass reduction, and less stroke demand.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Guanfu Lin, Zhong-Rong Lu, Jike Liu, Li Wang
Summary: Vision-based measurement is an emerging method that enables full-field measurement with non-contact and high spatial resolution capabilities. This paper presents a single-camera method for measuring out-of-plane vibration of plate structures using motion-parametric homography to capture image variation and displacement response.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Bronislaw Czaplewski, Mateusz Bocian, John H. G. Macdonald
Summary: Despite two decades of study, there is currently no model that can quantitatively explain pedestrian-generated lateral forces. This research proposes a foot placement control law based on empirical data to calibrate and generalize the rigid-leg inverted pendulum model (IPM) for predicting lateral structural stability.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Justine Carpentier, Jean-Hugh Thomas, Charles Pezerat
Summary: This paper proposes an improved method for the identification of vibration sources on a car window using the corrected force analysis technique. By redefining inverse methods in polar coordinates, more accurate results can be obtained.
JOURNAL OF SOUND AND VIBRATION
(2024)