Article
Mechanics
Xin Wang, Xue Li, Zeng-Shen Yue, Run-Pei Yu, Qian-Cheng Zhang, Shao-Feng Du, Zhi-Kun Yang, Bin Han, Tian Jian Lu
Summary: The study systematically investigated the vibration damping characteristics of laser-welded sandwich panels with high stiffness and high damping, and analyzed the accuracy of using surrogate models to approximate the damping loss factor of the sandwich panels. An efficient optimization procedure was proposed, factoring in structural stiffness, damping loss, and weight of the sandwich panel.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Civil
Hui Li, Dongming Liu, Bocheng Dong, Kaihua Sun, Jing Zhao, Qingshan Wang, Wei Sun, Xiangping Wang
Summary: The vibration suppression performance of composite pyramidal truss sandwich cylindrical shell panels with damping coating (DC) is investigated in this study. A novel theoretical model is developed based on the first-order shear deformation theory, artificial spring technique, Rayleigh-Ritz variational approach, and Duhamel integral method. Vibration tests are conducted to validate the model, and a parametric study is performed to analyze the influence of key material and geometric parameters on vibration properties. The results provide important insights for enhancing the vibration suppression capabilities of the DC-CPTSCS panels.
THIN-WALLED STRUCTURES
(2022)
Article
Mechanics
Chengyu Guan, Huimin Li, Zhiyong Yang, Yuyang Zhang, Daining Fang
Summary: This paper proposes a new method for fabricating carbon fiber reinforced polymer (CFRP) orthogonal lattice truss sandwich panels by inserting inner trusses into outer trusses. Three different adhesives, epoxy resin, ethylene-vinyl acetate copolymer (EVA), and nitrile butadiene rubber (NBR), are used to prepare the structures. The finite element modal strain energy method is employed to test and predict the mode shapes, natural frequencies, and loss factors of the structures. The results show that the EVA adhesive improves the loss factors of the structure while maintaining an acceptable reduction of the natural frequency.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Akin Oktav
Summary: The dynamic characteristics of an aluminum honeycomb sandwich panel are experimentally determined and the computational model is updated based on the experimental results. The study shows that the adhesives used in the bonding process affect the dynamic response of the sandwich panel by creating adhesive fillets between the face sheets and the core. The viscous damping of the structure is also determined through experimental modal analysis. The results of the experimental and computational analysis agree well when considering the effects of adhesive fillets and viscous damping. Furthermore, a dynamic response analysis under random vibration reveals the differences between the initial and updated models' results.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Mechanics
Mingze Ma, Weixing Yao, Wen Jiang, Wei Jin, Yan Chen, Piao Li, Jie Huang
Summary: The fatigue test of composite honeycomb sandwich panels under random vibration load was conducted in this study. The test results showed that the failure mode of the honeycomb sandwich structure under random vibration load was the same as that under constant-amplitude load. Based on the test results and the S-N curve of honeycomb sandwich panel under constant-amplitude load, a method was proposed to predict the fatigue life of composite honeycomb sandwich structures under random vibration load.
COMPOSITE STRUCTURES
(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
Engineering, Mechanical
Shuang Li, Jin-Shui Yang, Fang Yang, Ruediger Schmidt, Yong-Le Fan, Lin-Zhi Wu, Kai-Uwe Schroeder
Summary: Sandwich structures have been widely used in various fields for their lightweight and high load bearing properties. With the development of ship stealth technology, there is a demand for multifunctional structures with lightweight, high loading capacity, and excellent vibration reduction performances. The study focuses on the design and fabrication of novel gradient metallic lattice sandwich structures, and investigates their vibration characteristics and isolation performances through testing and simulation. The results show that interlayer gradient and face sheet thickness significantly affect the vibration characteristics, and the positive gradient structure has the best vibration isolation performance.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Materials Science, Composites
Xiaowen Dong, Bo Yin, Yanzhao Li, Yanchun Zhai
Summary: This article investigates the free vibration and damping properties of circular composite sandwich cylindrical shells (CCSCS) through parameter analysis, providing valuable suggestions to enhance the rigidity and damping properties of CCSCS.
POLYMER COMPOSITES
(2022)
Article
Engineering, Mechanical
Liu Rong, Zhong Yifeng, Miao Siqi, Irakoze Alain Evrard
Summary: This study proposes a novel sandwich panel with an improved star-shaped honeycomb by replacing sharp corners with cubic struts and lengthening inclined ribs. A two-dimensional equivalent downscaling model was developed to investigate the free vibration of the panel and its resonance characteristics under harmonic loading. The findings demonstrate that the model accurately predicts the vibration behavior of the panel and the inclusion of extended ribs and added struts reduces the maximum resonance amplitude.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Mechanics
Reza Aboutalebi, Mehdi Eshaghi, Afshin Taghvaeipour, Firooz Bakhtiari-Nejad
Summary: This study deals with the nonlinear free vibration analysis of sandwich plates containing electrorheological (ER) fluid as the core layer. The storage and loss moduli of the fluid are quantified using an equivalent linearized complex shear modulus. The governing equations of motion of the ER based sandwich plates are extracted using Classical Plate Theory (CPT) along with von Karman kinematic formulations. The nonlinear governing equations of motion are solved using a displacement control strategy to evaluate the resonant frequencies and corresponding loss factors. The effect of post-yield characteristics of the ER fluid, as well as electric field, boundary conditions, and plate parameters, on the natural frequencies and damping of the structure are comprehensively investigated.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Engineering, Civil
Kai Zhou, Taiwen You, Dao Gong, Jinsong Zhou
Summary: In this study, the dynamic behavior of moving corrugated sandwich panels is investigated using an equivalent model. The proposed control strategy successfully suppresses the vibration of the panels.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Mechanical
Jin-Shui Yang, Fang Yang, Liu Han, Li-Hong Yang, Lin-Zhi Wu
Summary: This study investigates the vibration behavior of glass fiber composite multi-layer graded corrugated sandwich panels (MLGCSPs), revealing the significant influences of arrangement modes, graded arrangement, and topologies of the corrugated cores on frequency responses and vibration reduction. The research demonstrates that optimizing the arrangement mode and gradient configuration can simultaneously achieve higher fundamental frequency and lower amplitude of the structures.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2022)
Article
Engineering, Civil
Mohammad Rauf Sheikhi, Selim Gurgen, Onder Altuntas, Mehmet Alper Sofuoglu
Summary: Nowadays, there is high interest in lightweight and eco-friendly composites with improved mechanical properties. In this study, cork-based sandwich structures were designed and produced to be used in the protective structures of low-speed aerial vehicles. Impact and vibration tests were conducted to evaluate the performance of the structures, and it was found that carbon fiber-reinforced polymer (CFRP) showed better resistance when exposed to impact and vibration threats. This study provides valuable information for researchers in choosing the right face sheet for cork core sandwich structures.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2023)
Article
Engineering, Civil
M. M. Keleshteri, J. Jelovica
Summary: This study proposes a novel higher-order porosity distribution model and investigates the free vibration and buckling behavior of cylindrical sandwich panels to validate the accuracy and effectiveness of the model. The results show that the higher-order porosity distribution can significantly increase the buckling load and fundamental natural frequency of cylindrical sandwich panels.
ENGINEERING STRUCTURES
(2022)
Article
Mechanics
Hamzeh Akbari, Mohammad Azadi, Hamidreza Fahham
Summary: In this paper, a numerical solution is presented for the free vibration analysis of sandwich cylindrical panels with a saturated functionally graded porous core and two homogeneous face sheets. The effects of various parameters on the natural frequencies are examined through a parametric study.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)