Article
Mechanics
Slavisa Salinic, Aleksandar Obradovic, Aleksandar Tomovic, Dragan Trifkovic, Aleksandar Grbovic
Summary: The paper investigates the coupled axial-bending vibration problem of an axially functionally graded Timoshenko cantilever beam with non-uniform cross-section. The coupling phenomenon arises from the transverse eccentricity of the mass center of a rigid body attached to the beam's free end. An approach based on the symbolic-numeric method of initial parameters is proposed to study the coupling phenomenon. The influence of transverse eccentricity on the natural frequencies and mode shapes of the cantilever beam is examined. This approach also has the potential to be applied to vibration problems of systems composed of rigid bodies interconnected by non-uniform non-homogeneous beams.
Article
Mechanics
F. Cannizzaro, I. Fiore, S. Caddemi, I. Calio
Summary: In this study, a new model is proposed to describe the free vibration problem of multi-cracked Timoshenko beams. The governing equations of the Timoshenko beam are modified by adding suitable distributional terms, and a closed form solution for vibration modes and frequency equation is obtained. The closed form solution allows for a parametric study to discuss the influence of concentrated shear and flexural stiffness decay due to the presence of multiple cracks.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2023)
Article
Chemistry, Multidisciplinary
Jung Woo Lee
Summary: This study proposes a new numerical method for the free vibration analysis of elastically restrained tapered Rayleigh beams with concentrated mass and axial force. The method establishes a frequency determinant considering various boundary conditions and employs the transfer matrix method for frequency analysis.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Multidisciplinary
Nasser Firouzi, Sayyed Roohollah Kazemi
Summary: This paper investigates the enhancement of vibration suppression of thick beams. By adding extra boundary conditions, the stability of the beam is increased. Moreover, considering the thick beam reveals that the equivalent damping of the beam enhances, resulting in an increase in excitation amplitude and frequency, and thus improving the stability of the beam.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Engineering, Civil
Hong-Yong Chen, Yuan-Cen Wang, Dong Wang, Ke Xie
Summary: A thermoelastic coupling model based on the Timoshenko beam model is established for an axially moving beam, considering the length-diameter ratio, axial load, and moving speed. The model unifies the axial tension and compression load into one governing equation and investigates the influence of different parameters on the beam's dynamic characteristics. The differential governing equations for transverse vibration of the axially moving beam, including axial tensile and compressive loads, are derived based on the Timoshenko beam theory and Hamilton's principle. The study also simulates the temperature field inside the beam and examines the thermal effect on the beam's dynamic characteristics under different heating cases.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2023)
Article
Mechanics
Hao Gao, Bingen Yang, Yegao Qu, Guang Meng
Summary: This paper proposes a new beam-moving rigid body model with distributed viscoelastic coupling to accurately describe the coupling between a structure and moving subsystems. Numerical simulations investigate the dynamic response of the beam structure and the effect of system configuration on its behavior.
Article
Engineering, Civil
J. R. Banerjee, A. Ananthapuvirajah, X. Liu, C. Sun
Summary: The free vibration behavior of coupled axial-bending Timoshenko beams was studied by developing the dynamic stiffness matrix and utilizing solution techniques to derive expressions for axial and bending displacements as well as bending rotation. The importance of axial-bending coupling effects and shear deformation in free vibration behavior was discussed with significant conclusions drawn.
THIN-WALLED STRUCTURES
(2021)
Article
Acoustics
Tamer A. El-Sayed, Heba H. El-Mongy
Summary: A novel approach based on the variational iteration method was introduced for free vibration analysis of beams, using a numeric-symbolic procedure to address the issue of increased execution time in symbolic integrations. The proposed method showed improved efficiency compared to conventional symbolic approaches, as verified through multiple examples. The new approach maintains high accuracy and robustness while reducing the time required for solving free vibration problems, with potential applications in engineering problems with extensive memory requirements.
JOURNAL OF VIBRATION AND CONTROL
(2022)
Article
Mechanics
Jiang Xu, Zhichun Yang, Jie Yang, Yinghui Li
Summary: This paper investigates the influence of boundary relaxation on the free vibration characteristics of a rotating composite laminated Timoshenko beam. Artificial springs are used to simulate the relaxed boundary conditions, adjusting the stiffness of the springs to obtain various relaxation conditions, with relaxation parameters introduced to evaluate the extent of boundary relaxation.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Amin Borji, Bashir Movahedian, Bijan Boroomand
Summary: In this paper, a new method for forced vibration analysis of multi-span Timoshenko beams subjected to external loads is implemented. The time-weighted residual approach is used, and the displacement and rotation fields are represented by exponential basis functions. The proposed method also introduces source functions and a dynamic index to improve accuracy and efficiency in beam analysis.
ARCHIVE OF APPLIED MECHANICS
(2022)
Article
Engineering, Civil
Xuehang Wang, Andi Xu, Fengming Li
Summary: A novel metamaterial periodic multi-span beam with elastic supports and local resonators is designed and studied. The vibration characteristics of the structure are investigated and the theoretical methods are validated through finite element analysis and vibration experiment. The results show that the structure can generate local resonance bandgaps in the low-frequency regions and Bragg bandgaps in the middle- and high-frequency regions. By adjusting the stiffness of the elastic supports, the positions and ranges of the Bragg bandgaps can be altered to improve the vibration reduction performance of the structure.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2023)
Article
Engineering, Multidisciplinary
Isa Ahmadi
Summary: This study investigates the free vibration of a multiple-nanobeam system under various edge boundary conditions and the number of coupled nanobeams. The Eringen's nonlocal elasticity theory is used to take into account the size effect, and the governing equations of the coupled beams are obtained using the Timoshenko beam theory. A meshless formulation is presented to discretize the equations into a set of ordinary differential equations in the time domain. The accuracy of the results is confirmed by comparing them with available analytical results in the literature, showing good agreement. The numerical results present the free vibration frequencies and mode shapes of the multiple-nanobeam system under various edge boundary conditions, and investigate the effects of parameters such as coupling stiffness, nonlocal parameters, and number of nanobeams. This method is useful for analyzing multiple-nanobeam systems with arbitrary number of nanobeams, arbitrary boundary conditions, coupling stiffness, and length to thickness ratio.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2022)
Article
Multidisciplinary Sciences
Xia Tan, You-Qi Tang
Summary: Severe vibration is induced by high flow velocity in the pipe. When the flow velocity exceeds the critical value, the static equilibrium configuration of the pipe becomes unstable and the vibration properties change. This paper reveals the free vibration characteristics of a pipe with fixed-fixed ends in the supercritical regime. The influence of system parameters on equilibrium configuration, critical velocity, and free vibration frequency is analyzed. Additionally, a comparison with the Euler-Bernoulli pipe model shows significant differences in critical velocity, equilibrium configuration, and frequency even for a large length-diameter ratio.
Article
Mathematics, Applied
Erwin Hernandez, Jesus Vellojin
Summary: This paper analyzes the response of an isotropic non-uniform linear viscoelastic Timoshenko beam using a modified constitutive law in a hereditary integral form. A mixed method framework is used to provide stable and semi-discrete error estimates, with numerical experiments showing good performance in both quasi-static and transient cases.
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2021)
Article
Engineering, Multidisciplinary
H. Jamshidi, A. A. Jafari, P. Jamshidi
Summary: In this study, an accurate model is used to analyze the dynamic response of a shaft with asymmetric geometry and unbalance forces. The model is validated through experimental testing and the dynamic behavior of the system is investigated using the Timoshenko beam theory. The results show that the asymmetry of the shaft and misalignment fault significantly affect the response of the rotor, and the accuracy of the results is improved by applying the Timoshenko beam theory.
Article
Engineering, Civil
Yusuf Yesilce
STRUCTURAL ENGINEERING AND MECHANICS
(2015)
Article
Engineering, Civil
Baran Bozyigit, Yusuf Yesilce
STRUCTURAL ENGINEERING AND MECHANICS
(2016)
Article
Engineering, Civil
Baran Bozyigit, Yusuf Yesilce, Seval Catal
STRUCTURAL ENGINEERING AND MECHANICS
(2017)
Article
Engineering, Civil
Onur Ozturkoglu, Taner Ucar, Yusuf Yesilce
EARTHQUAKES AND STRUCTURES
(2017)
Article
Mechanics
Baran Bozyigit, Yusuf Yesilce
MECHANICS RESEARCH COMMUNICATIONS
(2018)
Article
Computer Science, Interdisciplinary Applications
Oktay Demirdag, Yusuf Yesilce
ADVANCES IN ENGINEERING SOFTWARE
(2011)
Article
Mechanics
Yusuf Yesilce, Hikmet H. Catal
ARCHIVE OF APPLIED MECHANICS
(2011)
Article
Engineering, Biomedical
Yusuf Yesilce
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING
(2011)
Article
Acoustics
Yusuf Yesilce
SHOCK AND VIBRATION
(2011)
Article
Acoustics
Yusuf Yesilce
SHOCK AND VIBRATION
(2012)
Article
Engineering, Multidisciplinary
Baran Bozyigit, Yusuf Yesilce, Seval Catal
ENGINEERING SCIENCE AND TECHNOLOGY-AN INTERNATIONAL JOURNAL-JESTECH
(2018)
Article
Engineering, Civil
Baran Bozyigit, Yusuf Yesilce
STRUCTURAL ENGINEERING AND MECHANICS
(2018)
Article
Engineering, Mechanical
Yusuf Yesilce
ADVANCES IN VIBRATION ENGINEERING
(2013)
Article
Engineering, Civil
Baran Bozyigit, Yusuf Yesilce
STRUCTURAL ENGINEERING AND MECHANICS
(2018)
Article
Engineering, Multidisciplinary
Yusuf Yesilce
PAMUKKALE UNIVERSITY JOURNAL OF ENGINEERING SCIENCES-PAMUKKALE UNIVERSITESI MUHENDISLIK BILIMLERI DERGISI
(2012)
Article
Engineering, Mechanical
Rosaria Del Toro, Maria Laura De Bellis, Marcello Vasta, Andrea Bacigalupo
Summary: This article presents a multifield asymptotic homogenization scheme for analyzing Bloch wave propagation in non-standard thermoelastic periodic materials. The proposed method derives microscale field equations, solves recursive differential problems within the unit cell, establishes a down-scaling relation, and obtains average field equations. The effectiveness of this approach is validated by comparing dispersion curves with those from the Floquet-Bloch theory.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Yue Bao, Zhengcheng Yao, Yue Zhang, Xueman Hu, Xiandong Liu, Yingchun Shan, Tian He
Summary: This paper proposes a novel triple-gradient phononic acoustic black hole (ABH) beam that strategically manipulates multiple gradients to enhance its performance. The study reveals that the ABH effect is not solely brought about by the thickness gradient, but also extends to the power-law gradients in density and modulus. The synergistic development of three different gradient effects leads to more pronounced and broader bandgaps in PCs.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Matthias Ryser, Jason Steffen, Bekim Berisha, Markus Bambach
Summary: This study investigates the feasibility of replacing complex experiments with multiple simpler ones to determine the anisotropic yielding behavior of sheet metal. The results show that parameter identifiability and accuracy can be achieved by combining multiple specimen geometries and orientations, enhancing the understanding of the yield behavior.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Wenjun Li, Pengfei Zhang, Siyong Yang, Shenling Cai, Kai Feng
Summary: This study presents a novel two-dimensional non-contact platform based on Near-field Acoustic Levitation (NFAL), which can realize both one-dimensional and two-dimensional transportation. Numerical and experimental results prove the feasibility and ease of this method.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Shuo Liu, Lu Che, Guodong Fang, Jun Liang
Summary: This study presents a novel lamina conjugated bond-based peridynamic (BB-PD) model that overcomes the limitations of material properties and is applicable to composite laminates with different stacking sequences. The accuracy and applicability of the model are validated through simulations of elastic deformation and progressive damage behavior, providing an explanation of the damage modes and failure mechanisms of laminated composite materials subjected to uniaxial loading.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Omar El-Khatib, S. Kumar, Wesley J. Cantwell, Andreas Schiffer
Summary: Sandwich-structured honeycombs (SSHCs) are hierarchical structures with enhanced mass-specific properties. A model capable of predicting the elastic properties of hexagonal SSHCs is presented, showing superior in-plane elastic and shear moduli compared to traditional honeycombs, while the out-of-plane shear moduli are reduced.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Zhi-Jian Li, Hong-Liang Dai, Yuan Yao, Jing-Ling Liu
Summary: This paper proposes a process-performance prediction model for estimating the yield strength and ultimate tensile strength of metallic parts fabricated by powder bed fusion additive manufacturing. The effect of main process variables on the mechanical performance of printed metallic parts is analyzed and the results can serve as a guideline for improvement. The accuracy of the proposed model is validated by comparison with literature.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Saman A. Bapir, Kawa M. A. Manmi, Rostam K. Saeed, Abdolrahman Dadvand
Summary: This study numerically investigates the behavior of an ultrasonically driven gas bubble between two parallel rigid circular walls with a cylindrical micro-indentation in one wall. The primary objective is to determine the conditions that facilitate the removal of particulate contamination from the indentation using the bubble jet. The study found that the bubble jet can effectively remove contamination from the indentation for certain ranges of indentation diameter, but becomes less effective for larger indentation diameters.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
E. Polyzos, E. Vereroudakis, S. Malefaki, D. Vlassopoulos, D. Van Hemelrijck, L. Pyl
Summary: This research investigates the elastic and damage characteristics of individual composite beads used in 3D printed composites. A new analytical probabilistic progressive damage model (PPDM) is introduced to capture the elastic and damage attributes of these beads. Experimental results show strong agreement with the model in terms of elastic behavior and ultimate strength and strain.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
