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Dong-mei Wang - One of the best experts on this subject based on the ideXlab platform.

  • Maximum Vibration Transmissibility of Paper Honeycomb Sandwich Structures
    International Journal of Structural Stability and Dynamics, 2019
    Co-Authors: Rui Yang, Ning Liang, Dong-mei Wang, Yanfeng Guo
    Abstract:

    The maximum vibration transmissibility of paper Honeycomb Sandwich structures with different sizes of Honeycomb core under various static stresses was investigated using the sine frequency sweep te...

  • Investigation of vibration transmissibility for paper Honeycomb Sandwich structures with various moisture contents
    Mechanics & Industry, 2019
    Co-Authors: Dong-mei Wang, Rui Yang
    Abstract:

    Vibration transmissibility is an important factor to characterize the vibration absorption performance of cushioning packaging materials during transportation. Reasonable prediction of vibration transmissibility can guide antivibration design and reduce packaging cost. As a kind of green cushioning material, paper Honeycomb Sandwich structure is widely used in transport packaging because of its good machinability. But at the same time, it also has strong water absorption capacity. To a great extent, the vibration transmissibility of paper Honeycomb Sandwich structure may be affected by ambient humidity. In this research, the vibration transmissibility of paper Honeycomb Sandwich structures with various structure sizes under different humidity was tested by sine frequency sweep experiments. The rule of maximal vibration transmissibility with moisture content, cell length of Honeycomb, and thickness of Sandwich structure was analyzed. The results show that the maximal vibration transmissibility of paper Honeycomb Sandwich structure increases with the increase of moisture content, cell length of Honeycomb, and thickness of Sandwich structure. In order to construct the relationship between maximal vibration transmissibility and various factors, the moisture content was standardized. Finally, the maximal vibration transmissibility evaluation equation of paper Honeycomb Sandwich structure containing standardized moisture content and size of Sandwich structure was obtained, which is of some reference value for vibration prediction of paper Honeycomb Sandwich structures.

  • Analytical Model Construction of Natural Frequency for Paper Honeycomb Sandwich Plate—Block System
    The 21st IAPRI World Conference on Packaging, 2018
    Co-Authors: Ning Liang, Dong-mei Wang, Yanfeng Guo, Zi-you Bai, Rui Yang
    Abstract:

    Considering the slight deformation of the paper Honeycomb Sandwich plate in the vibration, the stiffness coefficient of the paper Honeycomb Sandwich plate was equivalent to the elasticity. The analytical model of natural frequency related to the structural and material parameters of the paper Honeycomb Sandwich plate and mass of block was derived. Subsequently, 5 different paper Honeycomb Sandwich plates and 3 different blocks were chosen to modify the analytical model by finite element method and verify it by experiment. The results show that the modifying factorl is 0.606 and the error between analytical and experimental results is less than 10%. In the future, the analytical model can be used to predict the natural frequency of paper Honeycomb Sandwich plate with different structural parameters under different blocks. Therefore, it provides the necessary theoretical reference for the optimization design of paper Honeycomb Sandwich plate.

  • 3D Energy Absorption Diagram Construction of Paper Honeycomb Sandwich Panel
    Shock and Vibration, 2018
    Co-Authors: Dong-mei Wang, Zi-you Bai, Qiang-hua Liao
    Abstract:

    Paper Honeycomb Sandwich panel is an environment-sensitive material. Its cushioning property is closely related to its structural factors, the temperature and humidity, random shocks, and vibration events in the logistics environment. In order to visually characterize the cushioning property of paper Honeycomb Sandwich panel in different logistics conditions, the energy absorption equation of per unit volume of paper Honeycomb Sandwich panel was constructed by piecewise function. The three-dimensional (3D) energy absorption diagram of paper Honeycomb Sandwich panel was constructed by connecting the inflexion of energy absorption curve. It takes into account the temperature, humidity, strain rate, and characteristics of the Honeycomb structure. On the one hand, this diagram breaks through the limitation of the static compression curve of paper Honeycomb Sandwich panel, which depends on the test specimen and is applicable only to the standard condition. On the other hand, it breaks through the limitation of the conventional 2D energy absorption diagram which has less information. Elastic modulus was used to normalize the plateau stress and energy absorption per unit volume. This makes the 3D energy absorption diagram universal for different material Sandwich panels. It provides a new theoretical basis for packaging optimized design.

  • Investigation of mechanical property for paper Honeycomb Sandwich composite under different temperature and relative humidity
    Journal of Reinforced Plastics and Composites, 2013
    Co-Authors: Dong-mei Wang, Jun Wang, Qiang-hua Liao
    Abstract:

    The influence of temperature and relative humidity on the moisture content of paper Honeycomb Sandwich panels was studied, and the ideal three-dimensional diagram between the moisture content of paper Honeycomb Sandwich panels and the temperature and relative humidity was constructed by the GAB model. The evaluation equation of critical stress and plateau stress were obtained. The results indicate that the moisture content of paper Honeycomb Sandwich panels rises with the increase of relative humidity and declines with the increase of temperature; as the moisture content increases, the critical stress and plateau stress of paper Honeycomb Sandwich panels decline linearly; with the increase of the moisture content, the energy absorption of paper Honeycomb Sandwich panels increased firstly and then decreased; the evaluation equation of critical stress and plateau stress can predict the mechanical properties of paper Honeycomb Sandwich panels in different temperatures and relative humidities.

Junhua Zhao - One of the best experts on this subject based on the ideXlab platform.

  • Study on the impact resistance of Honeycomb Sandwich structures under low-velocity/heavy mass
    Composite Structures, 2019
    Co-Authors: Xinwei Xue, Chaofeng Zhang, Wei Chen, Junhua Zhao
    Abstract:

    Abstract The Honeycomb Sandwich structure is a typical light weight structure that is widely used in transportation and other industries. It is necessary to study the impact resistance of this Honeycomb Sandwich structure when subjected to low-velocity and heavy mass drops. To improve the impact resistance of the Honeycomb Sandwich structure under low-velocity and heavy load, the first stage was the development of a high ductility and high strength carbon/glass fibre hybrid composite skin. A further discussion is conducted about the relation between the Honeycomb core height and the impact resistance of the Honeycomb Sandwich structure, according to simultaneous test results and finite element method (FEM) analysis. With the verified accurate FEM, the impact resistance of the Honeycomb Sandwich structure being affected by the Honeycomb wall thickness, cell size and impact energy is analysed. Finally, some useful conclusions are drawn for the design of lightweight Honeycomb Sandwich structures.

Mohd Azman Yahaya - One of the best experts on this subject based on the ideXlab platform.

  • response of aluminium Honeycomb Sandwich panels subjected to foam projectile impact an experimental study
    International Journal of Impact Engineering, 2015
    Co-Authors: Mohd Azman Yahaya, Dong Ruan, Matthew S Dargusch
    Abstract:

    Aluminium Honeycomb Sandwich panels have potential applications as a protective mechanism that can be used to prevent failure of an important structure subjected to impact loading. Therefore it is important to fully understand the resistance of the Sandwich panels subjected to impact loading conditions. The main objective of this work was to study the resistance of Sandwich panels with different aluminium Honeycomb cores, air Sandwich panels (no core between the two face sheets) and monolithic plates of equivalent mass subjected to impact from foam projectiles. The deformation and the elastic spring-back of the Honeycomb Sandwich panels and the monolithic plates have been compared and discussed. The resistance of the panels and plates has been quantified by their back-face deflection with respect to the projectile impulse. Five different types of aluminium Honeycombs have been used as the core material. The front-face sheet and the back-face sheet of the Honeycomb Sandwich panels are made of aluminium plate with 1 mm thickness. Cylindrical ALPORAS aluminium foams with a relative density between 9% and 11% are employed as the metal foam projectiles. They are fired at several hundred metres per second towards the centre of the panels and plates using a gas gun. The deflection histories of the back-face have been measured using a laser displacement sensor. From the deflection histories, the maximum deflection and the final deflection of the back-face can be distinguished. Deformation modes and failure modes of the individual component have been observed and classified into several categories. Moreover, the deflections of the Honeycomb Sandwich panels have been compared with deflections from air Sandwich panels. It is found that the Honeycomb Sandwich panels outperform both the air Sandwich panels and the monolithic plates within an impulse range of 2.25 kNsm(-2) similar to 4.70 kNsm(-2). Outside this operational range, the advantages associated with employing the Honeycomb Sandwich panels as a protective structure upon impact of foam projectiles diminishes. (C) 2014 Elsevier Ltd. All rights reserved.

Rui Yang - One of the best experts on this subject based on the ideXlab platform.

  • Maximum Vibration Transmissibility of Paper Honeycomb Sandwich Structures
    International Journal of Structural Stability and Dynamics, 2019
    Co-Authors: Rui Yang, Ning Liang, Dong-mei Wang, Yanfeng Guo
    Abstract:

    The maximum vibration transmissibility of paper Honeycomb Sandwich structures with different sizes of Honeycomb core under various static stresses was investigated using the sine frequency sweep te...

  • Investigation of vibration transmissibility for paper Honeycomb Sandwich structures with various moisture contents
    Mechanics & Industry, 2019
    Co-Authors: Dong-mei Wang, Rui Yang
    Abstract:

    Vibration transmissibility is an important factor to characterize the vibration absorption performance of cushioning packaging materials during transportation. Reasonable prediction of vibration transmissibility can guide antivibration design and reduce packaging cost. As a kind of green cushioning material, paper Honeycomb Sandwich structure is widely used in transport packaging because of its good machinability. But at the same time, it also has strong water absorption capacity. To a great extent, the vibration transmissibility of paper Honeycomb Sandwich structure may be affected by ambient humidity. In this research, the vibration transmissibility of paper Honeycomb Sandwich structures with various structure sizes under different humidity was tested by sine frequency sweep experiments. The rule of maximal vibration transmissibility with moisture content, cell length of Honeycomb, and thickness of Sandwich structure was analyzed. The results show that the maximal vibration transmissibility of paper Honeycomb Sandwich structure increases with the increase of moisture content, cell length of Honeycomb, and thickness of Sandwich structure. In order to construct the relationship between maximal vibration transmissibility and various factors, the moisture content was standardized. Finally, the maximal vibration transmissibility evaluation equation of paper Honeycomb Sandwich structure containing standardized moisture content and size of Sandwich structure was obtained, which is of some reference value for vibration prediction of paper Honeycomb Sandwich structures.

  • Analytical Model Construction of Natural Frequency for Paper Honeycomb Sandwich Plate—Block System
    The 21st IAPRI World Conference on Packaging, 2018
    Co-Authors: Ning Liang, Dong-mei Wang, Yanfeng Guo, Zi-you Bai, Rui Yang
    Abstract:

    Considering the slight deformation of the paper Honeycomb Sandwich plate in the vibration, the stiffness coefficient of the paper Honeycomb Sandwich plate was equivalent to the elasticity. The analytical model of natural frequency related to the structural and material parameters of the paper Honeycomb Sandwich plate and mass of block was derived. Subsequently, 5 different paper Honeycomb Sandwich plates and 3 different blocks were chosen to modify the analytical model by finite element method and verify it by experiment. The results show that the modifying factorl is 0.606 and the error between analytical and experimental results is less than 10%. In the future, the analytical model can be used to predict the natural frequency of paper Honeycomb Sandwich plate with different structural parameters under different blocks. Therefore, it provides the necessary theoretical reference for the optimization design of paper Honeycomb Sandwich plate.

Wei Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Transient nonlinear responses of an auxetic Honeycomb Sandwich plate under impact loads
    International Journal of Impact Engineering, 2019
    Co-Authors: Junhua Zhang, Xiufang Zhu, Xiao-dong Yang, Wei Zhang
    Abstract:

    Abstract In this paper, we study the nonlinear transient responses of an auxetic (negative Poisson's ratio) Honeycomb Sandwich plate under impact dynamic loads. The partial differential equations of the Honeycomb Sandwich plate based on Reddy's higher shear deformation theory and Hamilton's principle are obtained. The nonlinear ordinary differential equations are then derived by Galerkin truncation method. The dynamic responses of the Honeycomb Sandwich plate subjected to different loads, such as step loading, air-blast loading, sinusoidal loading, triangular loading and incremental loading, respectively, have been investigated. The contributions of total thickness, core thickness ratio, Poisson's ratio, cell inclination angle and blast types to transient responses of the plate are discussed in detail by numerical simulations. The effect of geometrical parameters on the dynamics of the plate and the effect of different blast loads on the plate are obtained. It is found that the Honeycomb Sandwich plate with negative Poisson's ratio would be a better choice compared with the positive one for some structures under dynamic loads.

  • Vibration frequencies and energies of an auxetic Honeycomb Sandwich plate
    Mechanics of Advanced Materials and Structures, 2018
    Co-Authors: Xiufang Zhu, Junhua Zhang, Wei Zhang, J. Chen
    Abstract:

    Frequencies and energies of vibrations for a Honeycomb Sandwich plate with negative Possion's ratio are investigated. Based on Reddy's third-order shear deformation plate theory, von Karman type no...

  • Free Vibrations and Nonlinear Responses for a Cantilever Honeycomb Sandwich Plate
    Advances in Materials Science and Engineering, 2018
    Co-Authors: Junhua Zhang, Xiao-dong Yang, Wei Zhang
    Abstract:

    Dynamics of a cantilever Honeycomb Sandwich plate are studied in this paper. The governing equations of the composite plate subjected to both in-plane and transverse excitations are derived by using Hamilton’s principle and Reddy’s third-order shear deformation theory. Based on the Rayleigh–Ritz method, some modes of natural frequencies for the cantilever Honeycomb Sandwich plate are obtained. The relations between the natural frequencies and the parameters of the plate are investigated. Further, the Galerkin method is used to transform the nonlinear partial differential equations into a set of nonlinear ordinary differential equations. Nonlinear dynamic responses of the cantilever Honeycomb Sandwich plate to such external and parametric excitations are discussed by using the numerical method. The results show that in-plane and transverse excitations have an important influence on nonlinear dynamic characteristics. Rich dynamics, such as periodic, multiperiodic, quasiperiodic, and chaotic motions, are located and studied by the bifurcation diagram for some specific parameters.