Article
Engineering, Multidisciplinary
Bo Fan, Zhongmin Wang, Qingbo Wang
Summary: This article employs the Euler-Bernoulli beam theory to establish nonlinear differential equations for the rotating ring on an elastic foundation (RREF) based on Lagrangian strain and simplified curvature. The study investigates the nonlinear motion and response of the RREF under various conditions, such as rotating and non-rotating states, and the influences of internal pressure, elastic support stiffness, and Young's modulus. The proposed adaptive curved beam element improves computational efficiency and allows for more accurate analysis of the RREF's characteristics.
APPLIED MATHEMATICAL MODELLING
(2022)
Article
Multidisciplinary Sciences
Jie Song, Peng Si, Hongliang Hua, Zhongxin Li
Summary: This study presents a novel DVA-beam element and an element deactivating method for rapid modeling and computation of the DVA-beam system. The reliability and convenience of the proposed method are validated through numerical examples. The effectiveness and applicability of the DVA-beam element in engineering optimization are investigated and impressive performance is observed.
Article
Engineering, Mechanical
Tingting Yuan, Lingling Tang, Zhuyong Liu, Jinyang Liu
Summary: This study investigates a nonlinear dynamic formulation for flexible origami-based deployable structures considering self-contact and friction, proposing a mixed contact method to effectively avoid mutual penetration of different components and validate its effectiveness through numerical examples.
NONLINEAR DYNAMICS
(2021)
Article
Mechanics
Jan Sladek, Vladimir Sladek, Miroslav Repka, Qian Deng
Summary: The flexoelectric effect, a universal two-way electromechanical coupling, can significantly improve health monitoring of structures, especially near crack defects. The mixed finite element method is a computational method developed for solving flexoelectric boundary value problems.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Electrical & Electronic
Yu Xing, Lei Liu, Chao Liu, Bo Li, Zishen Wang, Pengfei Li, Erhu Zhang
Summary: This study proposes an improved ANCF lower-order plate element to accurately characterize the mechanical deformation and bending behavior of silicone rubber fingers. Compared to conventional lower-order plate elements and higher-order plate elements, this model can better represent the geometric features of the fingers and compute more efficiently.
Article
Materials Science, Multidisciplinary
Yao Feng, Jimei Wu, Mingyue Shao
Summary: This paper studies the rotational vibration characteristics of a thin-film antenna, analyzes the influence of structural size on its vibration characteristics, and provides a theoretical basis for the structural design of thin-film antennas.
RESULTS IN PHYSICS
(2022)
Article
Engineering, Geological
Zhidong Gao, Mi Zhao, Junqi Zhang, Xiuli Du, Jinting Wang
Summary: This paper investigates the impact of the offset between the outer surface and neutral surface of beam and shell elements on the dynamic soil-structure interaction. Coupling conditions between the beam and solid considering the offset are deduced and implemented in the finite element analysis. The effects of the offset on dynamic soil-structure interaction are discussed through seismic responses of a retaining wall, subway station and tunnel.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Civil
Eduardo A. W. de Menezes, Tales V. Lisboa, Rogerio J. Marczak
Summary: Cables and wire ropes are structural components designed for high axial strength and relatively low torsion and flexure stiffness. A new finite element is designed and implemented to incorporate the behavior of a 3D cable modeled using solid elements into a 1D beam element. The proposed equivalent element shows good accuracy in strain energy, stiffness, and dynamic behavior compared to the cable modeled with solid elements.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
Zhi Yong Ai, Wei Tao Ji, Yang Li, Hai Tao Li
Summary: This study derives analytical layer-elements for dynamic response of saturated multilayered soils under vertical impulsive loadings based on elastodynamics and Biot's poroelastodynamics framework. The total stiffness matrices are obtained by assembling individual layer-elements considering boundary and continuity conditions. Numerical examples validate the accuracy of the proposed method and illustrate the influence of various factors on the dynamic response of saturated soils.
APPLIED MATHEMATICAL MODELLING
(2021)
Article
Mechanics
Yanhu Li, Yongjie Lu, Tongtong Wang, Junning Zhang
Summary: A new higher-order plate/shell element with quadratic interpolation in the transverse direction for dynamic analysis of flexible plate and shell with variable thickness is developed in this paper. The proposed element is verified through a flexible pendulum test and further dynamic simulation analyses. The results indicate that thickness distribution significantly affects the dynamic response of flexible plates. The new element has advantages in predicting large deformation of the flexible plate and shell with variable thickness.
Review
Mechanics
Michael Taylor, Radu Serban, Dan Negrut
Summary: This paper presents a comprehensive study on five different ANCF solution strategies for calculating the generalized internal force and its Jacobian matrix. The study includes extending these methods to incorporate a linear viscoelastic material model and comparing their performance on beam, shell, and hexahedral elements. The results show that while the differences among the methods are small for beam elements, there are pronounced performance and storage cost differences for shell and hexahedral elements.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2023)
Article
Engineering, Civil
Bo Fan, Zhongmin Wang, Qingbo Wang
Summary: In this study, a rotating thick ring on the elastic foundation (RTREF) model is established using the absolute nodal coordinate formulation (ANCF) and plane stress theory to investigate the influence of elastic boundary position and other factors on dynamic characteristics. By analyzing the effects of elastic boundary position, thick wall, and rotational speed on the vibration characteristics and nonlinear forced transient response of the RTREF model, it is shown that the influence of elastic boundary positions on the dynamic characteristics cannot be ignored even if the ring wall is thin.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2023)
Article
Physics, Multidisciplinary
Vinyas Mahesh
Summary: This study examines the nonlinear dynamic response of blast loaded magnetoelectroelastic multiphase porous plates in a temperature environment.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Engineering, Mechanical
Wen Zhao, Rodrigo T. Rocha, Nouha Alcheikh, Mohammad I. Younis
Summary: This work presents an analytical and experimental study to enhance the dynamic response of the higher-order vibration modes of resonant microstructures. The authors propose a multi-mode excitation technique to enhance the vibration response of higher order modes of an electrostatically actuated micro cantilever beam. The results show that this technique significantly raises the response level above noise and amplifies displacement amplitude, making it promising for future signal processing technologies and high-sensitivity sensors.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Mechanics
Kun Li, Zuqing Yu, Peng Lan, Qinglong Tian, Nianli Lu
Summary: A new fully parameterized beam element has been proposed in this paper for modeling the variable length cable in the cable-driven mechanism. The formulation of elastic force, additional generalized inertial force, and their corresponding Jacobian matrices for the proposed element have been derived. The enhanced continuous mechanics approach has been applied to alleviate the Poisson locking effect. The rigid end-effector is modeled using the absolute nodal coordinate formulation reference node, and the pre-tension of the cable is considered.
MULTIBODY SYSTEM DYNAMICS
(2023)
Article
Nanoscience & Nanotechnology
Jan Sleichrt, Tomas Fila, Petr Koudelka, Marcel Adorna, Jan Falta, Petr Zlamal, Jonathan Glinz, Michaela Neuhaeuserova, Tomas Doktor, Anja Mauko, Daniel Kytyr, Matej Vesenjak, Isabel Duarte, Zoran Ren, Ondrej Jirousek
Summary: This study evaluated the performance of three aluminum alloy-based cellular materials through dynamic penetration testing, with detailed analysis using high-speed cameras, wave separation technique, and Digital Image Correlation method. Differential X-ray computed tomography was utilized for advanced pre- and post-impact volumetric analysis of the specimens.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Anja Mauko, Tomas Fila, Jan Falta, Petr Koudelka, Vaclav Rada, Michaela Neuhauserova, Petr Zlamal, Matej Vesenjak, Ondrej Jirousek, Zoran Ren
Summary: This study experimentally investigated the mechanical behavior of three different auxetic cellular structures and observed significant auxetic behavior and stress enhancement under different testing conditions, confirming the Poisson's ratio strain-rate dependency for all three structures.
Article
Mechanics
Nejc Novak, Oraib Al-Ketan, Lovre Krstulovic-Opara, Reza Rowshan, Rashid K. Abu Al-Rub, Matej Vesenjak, Zoran Ren
Summary: This research evaluated the compressive behavior of TPMS cellular structures under quasi-static and dynamic loading, showing that dynamic loading resulted in higher plateau stress and energy absorption in the plastic region of the samples.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Mechanical
Dejan Tomazincic, Matej Borovinsek, Zoran Ren, Jernej Klemenc
Summary: The study investigated the fatigue life of a high-pressure die-cast alloy with significant porosity, AlSi9Cu3. Results showed that pores have a significant influence on fatigue life, and two different methods were used to predict the fatigue life.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Materials Science, Multidisciplinary
Nejc Novak, Olly Duncan, Tom Allen, Andrew Alderson, Matej Vesenjak, Zoran Ren
Summary: This study analyzed the shear moduli of conventional and auxetic open-cell polymer foams, finding that the measured shear moduli of auxetic foams were generally lower, and the calculated shear moduli were lower than the measured values.
MECHANICS OF MATERIALS
(2021)
Article
Chemistry, Physical
Hasan Al-Rifaie, Nejc Novak, Matej Vesenjak, Zoran Ren, Wojciech Sumelka
Summary: This paper presents the fabrication and experimental testing of the Uniaxial Graded Auxetic Damper (UGAD), a shock-absorbing system with lightweight and excellent energy-dissipation characteristics. The results show that the manufactured UGAD matches well with the computational predictions, validating the proposed computational and material models.
Article
Polymer Science
Polona Dobnik Dubrovski, Nejc Novak, Matej Borovinsek, Matej Vesenjak, Zoran Ren
Summary: A modern multifunctional material with auxetic behavior and tailored open area for particle filtration was developed using traditional textile technology and laser cutting. Through investigating three different rotating unit cell sizes, it was found that larger rotating cell sizes offer higher average negative Poisson's ratio and breaking strength. This study highlights the usefulness of patterned cuts in developing advanced auxetic textile materials with tailored geometrical and mechanical properties.
Article
Materials Science, Multidisciplinary
Masatoshi Nishi, Shigeru Tanaka, Akihisa Mori, Matej Vesenjak, Zoran Ren, Kazuyuki Hokamoto
Summary: This study investigates the mechanism of high-pressure generation in unidirectional cellular materials during high-velocity impact, revealing a unique phenomenon of high-pressure generation near the pores and discussing the contribution of pore geometries.
Article
Materials Science, Multidisciplinary
Nejc Novak, Oraib Al-Ketan, Lovre Krstulovic-Opara, Reza Rowshan, Matej Vesenjak, Zoran Ren
Summary: The study investigates the use of Triply Periodic Minimal Surface (TPMS)-filled tubes as energy-absorbing components for crashworthiness applications. It is found that TPMS-filled tubes can enhance specific energy absorption by up to 46% compared to empty tubes and the core response separately. The mechanical response of TPMS-filled tubes can be tuned by adjusting the relative densities or distributions of the core.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Nejc Novak, Anja Mauko, Miran Ulbin, Lovre Krstulovic-Opara, Zoran Ren, Matej Vesenjak
Summary: This study presents novel three-dimensional axisymmetric chiral structures with negative and zero Poisson's ratios, created by converting traditional chiral structure unit cells and evaluating their mechanical properties using digital image correlation technology. The new designs are fabricated and experimentally tested using additive manufacturing technology, showing superior mechanical performance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Mechanics
Nejc Novak, Matej Borovinsek, Oraib Al-Ketan, Zoran Ren, Matej Vesenjak
Summary: This study analyzed the impact and blast resistance of sandwich panels with uniform and functionally graded TPMS cellular cores. The computational models were validated using experimental compression tests of different TPMS cellular structures. The introduction of graded porosity using thickness and cell size variation allows for tailored mechanical and deformation response of the TPMS structures and TPMS filled sandwich panels.
COMPOSITE STRUCTURES
(2022)
Article
Nanoscience & Nanotechnology
Nejc Novak, Dan Kytyr, Vaclav Rada, Tomas Doktor, Oraib Al-Ketan, Reza Rowshan, Matej Vesenjak, Zoran Ren
Summary: The mechanical response of foam-filled tubes with diamond lattice cores under compressive loading was investigated. The in-situ and ex-situ TPMS-filled tubes showed superior performance compared to empty tubes. Energy absorption was enhanced by 12%-44% depending on the loading direction. The developed computational models were accurate and suitable for real-life applications such as crashes and impacts.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Mechanical
Nejc Novak, Oraib Al-Ketan, Anja Mauko, Yunus Emre Yilmaz, Lovre Krstulovic-Opara, Shigeru Tanaka, Kazuyuki Hokamoto, Reza Rowshan, Rashid Abu Al-Rub, Matej Vesenjak, Zoran Ren
Summary: This study investigated the mechanical response of additively manufactured sheet-based stochastic cellular materials under impact loading. Samples with different relative densities were fabricated using the powder bed fusion additive manufacturing technique. The samples were then tested under quasi-static and dynamic compressive loading conditions to evaluate their mechanical behavior.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Engineering, Civil
Nejc Novak, Shigeru Tanaka, Kazuyuki Hokamoto, Anja Mauko, Yunus Emre Yilmaz, Oraib Al-Ketan, Matej Vesenjak, Zoran Ren
Summary: In this study, four different geometries of uniform triply periodic minimal surface cellular structures were fabricated and tested under different compressive strain rates. The deformation behavior and energy absorption capacity of these structures changed with different strain rates. Computational models were also developed to predict the behavior of these structures at higher strain rates, and it was found that the Diamond and IWP structures exhibited higher energy absorption capacity.
THIN-WALLED STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Anja Mauko, Mustafa Sarikaya, Mustafa Guden, Isabel Duarte, Matej Borovinsek, Matej Vesenjak, Zoran Ren
Summary: This study investigated the high-strain rate mechanical properties of open-cell aluminium foam M-pore (R). The results showed that the foam's behavior is strongly dependent on the loading rate, with changes in plateau stress and deformation front formation and propagation. X-ray micro-computed tomography (mCT) was used to analyze the internal structure of the specimens. Numerical models were built and computational simulations were conducted to simulate the mechanical response of the foam under different loading rates. The agreement between the experimental and computational results was good.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)