Research on Crushing Performance of Sandwich Panel with V-Type Corrugated Core under Shock Load

2013 ◽  
Vol 694-697 ◽  
pp. 216-220 ◽  
Author(s):  
Lin Chen ◽  
Xiao Zhong Xie ◽  
Zhuo Li ◽  
Ye Qing Jin
Keyword(s):  
Inclination Angle ◽  
Sandwich Structure ◽  
Sandwich Panel ◽  
Structural Parameters ◽  
Design And Optimization ◽  
Finite Element Software ◽  
The Core ◽  
Practical Design ◽  
Core Thickness ◽  
Core Height

Sandwich panels with a V-type corrugated core are developed to investigate their crushing performance under lateral load based on the numerical method. The validity and feasibility of the calculation method is qualified by comparing numerical results with experiment results. Based on that, finite element software is applied to analyze the effects of structural parameters on the crushing performance of sandwich structure. Then inspecific energy increases as the core thickness and inclination angle are increased, but it will induce as the core height is raised. Additionally, the average crushing strength is increased with the increasing thickness, but it will decrease as the core height and inclination angle are raised. The results of this research may help the practical design and optimization of sandwich panel with corrugated core.

Finite Element Analysis (FEA) of Honeycomb Sandwich Panel for Continuum Properties Evaluation and Core Height Influence on the Dynamic Behavior

2011 ◽  
Vol 326 ◽  
pp. 1-10 ◽  
Author(s):  
Hammad Rahman ◽  
Rehan Jamshed ◽  
Haris Hameed ◽  
Sajid Raza
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Analytical Solution ◽  
Vibration Analysis ◽  
Sandwich Structure ◽  
Sandwich Panel ◽  
Fe Analysis ◽  
Element Analysis ◽  
Honeycomb Sandwich ◽  
Core Height

Finite element analysis of honeycomb sandwich panel has been performed by modeling the structure through three different approaches. Continuum properties are calculated through analytical solution and verified through FE analysis of bare core. In addition to that the thickness of core has also been varied in all the three approaches in order to study its effect on vibration analysis of sandwich structure.

Free vibration and buckling analyses of cylindrical sandwich panel with magneto rheological fluid layer

2015 ◽  
Vol 19 (4) ◽  
pp. 397-423 ◽  
Author(s):  
Keramat MalekzadehFard ◽  
Mohsen Gholami ◽  
Farshid Reshadi ◽  
Mostafa livani
Keyword(s):  
Free Vibration ◽  
Sandwich Panel ◽  
Fluid Layer ◽  
Thickness Ratio ◽  
Mode Shapes ◽  
Geometrical Parameters ◽  
Finite Element Software ◽  
Core Thickness ◽  
Magneto Rheological ◽  
Panel Thickness

In this paper, the free vibration and buckling analyses of the cylindrical sandwich panel with magneto-rheological fluid layer for simply supported boundary conditions was performed based on an improved higher order sandwich panel theory. This paper deals with investigation of the effects of magnetic field, geometrical parameters such as the core thickness to the panel thickness ratio, MR layer thickness to the panel thickness ratio and the fiber angle on the natural frequencies, loss factors and buckling loads corresponding to the first four mode shapes. In order to validate the results obtained from the present study, the cylindrical sandwich panel was simulated and analyzed in finite element software ABAQUS. A good agreement was observed between the results of present method and those extracted from simulation.

scholarly journals Research on Dynamics Stiffness of Honeycomb Sandwich Structure Door

2021 ◽  
Vol 2133 (1) ◽  
pp. 012036
Author(s):  
Xiuqi Yuan
Keyword(s):  
Sandwich Structure ◽  
High Reliability ◽  
Dynamic Stiffness ◽  
Functional Requirements ◽  
Design And Optimization ◽  
Door Opening ◽  
Finite Element Software ◽  
Honeycomb Sandwich ◽  
Calculation Results ◽  
Honeycomb Sandwich Structure

Abstract During the emergency opening of the aircraft door in the air, the door must experience a complex and harsh mechanical environment. In order to ensure the high reliability of the door, it must have sufficient dynamic stiffness. When using finite element software for static engineering analysis, the calculation results often have large deviations due to improper simplification of the motion links in the structure. Aiming at the characteristics of the honeycomb sandwich structure of a class of civil aircraft doors, a combination of topology optimization and dynamic analysis was adopted to take into account the door load and the door opening speed. The results of dynamic calculation show that when the door is opened in the air, the bending deformation during cruise is in compliance with the requirements, and the structural rigidity meets the functional requirements. The research results have important effects on the design and optimization of the stiffness performance of honeycomb sandwich doors.

Optimization of Dimensions of a Sandwich Structure Using Genetic Algorithm (GA)

2008 ◽  
Vol 47-50 ◽  
pp. 371-374 ◽  
Author(s):  
Mohammad Reza Khoshravan ◽  
M. Hosseinzadeh
Keyword(s):  
Genetic Algorithm ◽  
Sensitivity Analysis ◽  
Execution Time ◽  
Sandwich Structure ◽  
Sandwich Panel ◽  
Multilayer Composite ◽  
The Core ◽  
Optimum Height

Optimum height of the core and thickness of the composite faces of a sandwich panel under a defined loading have been computed in order to obtain the lowest weight of structure and its highest stiffness. Either by choosing adequate lay up sequence of multilayer composite faces, desired properties of the composite faces was chosen. The Genetic Algorithm (GA) based on statistics was used and to obtain the best methods of G.A., sensitivity analysis was carried out. In result, the influence of sensitivity analysis was found useful because it leaded to a better convergence of problem and decreased the execution time of the problem.

scholarly journals Geometrical Analysis of 3D Integrated Woven Fabric Reinforced Core Sandwich Composites

2019 ◽  
Vol 27 (1(133)) ◽  
pp. 45-50
Author(s):  
Abdul Jabbar ◽  
Mehmet Karahan ◽  
Muhammad Zubair ◽  
Nevin Karahan
Keyword(s):  
Cross Sections ◽  
Volume Fraction ◽  
Structural Parameters ◽  
Fibre Volume Fraction ◽  
Slope Angle ◽  
Fibre Volume ◽  
Woven Fabric ◽  
Sandwich Composites ◽  
The Core ◽  
Core Thickness

The variability of the internal geometry parameters, such as the waviness of yarns, cross sections of yarns and local fibre volume fraction of 3-dimensional (3D) integrated woven core sandwich composites affects their mechanical properties. The objective of this study was to define the geometrical and structural parameters of 3D integrated woven core sandwich composites, including the fold ratio of pile threads, the fabric areal weight and the fibre volume fraction by changing the core thickness of 3D sandwich core fabric. 3D fabrics with different core thicknesses were used for reinforcement. It was confirmed that the pile fold ratio, slope angle and pile length increase with an increase in the core thickness of the fabric. The difference between the calculated and experimental areal weights of fabrics was in the range of 5-13%. A novel approach was also presented to define the fibre volume fraction of 3D woven core sandwich composites.

Numerical Modelling of Impact Behavior of Composite Sandwich Panel With Honeycomb Core

2019 ◽  
Author(s):  
Shah Alam ◽  
Aakash Bungatavula
Keyword(s):  
Sandwich Panel ◽  
Sheet Thickness ◽  
Face Sheet ◽  
Honeycomb Core ◽  
Impact Performance ◽  
Composite Sandwich ◽  
The Core ◽  
The Face ◽  
Core Height ◽  
The Impact

Abstract The goal of this paper is to find the best impact response of the composite sandwich panels with honeycomb core. The focus of the study is to find the effects of changing the face sheet thickness and the core height of the sandwich panel subjected to variable velocities on impact performance. Initially, honeycomb core sandwich panel with 1mm thick face sheet is modelled in Abaqus/explicit to calculate the energy absorption, residual velocity, and deformation at four different velocities. Then, the process is repeated by changing the face sheets thickness to 2mm and 3mm to see the effects of changing the thickness on the impact performance of a composite sandwich panel. The honeycomb core height is also changed to see its effect on the performance. In all models, Al 7039 is used in the core and T1000G is used in the face sheets.

Methodology for multiscale design and optimization of lattice core sandwich structures for lightweight hopper railcars

2020 ◽  
Vol 234 (21) ◽  
pp. 4224-4238 ◽  
Author(s):  
Danial Molavitabrizi ◽  
Jeremy Laliberte
Keyword(s):  
Sandwich Structure ◽  
Sandwich Panel ◽  
Failure Modes ◽  
Minimum Weight ◽  
Strength Properties ◽  
Optimized Design ◽  
Design And Optimization ◽  
Floor Panel ◽  
Octet Truss ◽  
Lattice Core

This research is focused on developing new lightweight structures for railcars based on a pre-selected material, i.e. Al 2099. The goal is to design a new sandwich structure with an octet truss lattice core for a floor panel of a hopper freight railcar designed to meet North American standards. For that, mesoscale to macroscale design of the sandwich panel was performed. In mesoscale design, relative density, elastic properties, strength properties, and failure criterion of the lattice unit cell were investigated. In the next step, these properties were used as inputs for macroscale design, i.e. design of the whole sandwich structure. Multiple failure modes associated with the lateral loading of a sandwich panel were analyzed. These equations in conjunction with the minimum weight target led to an optimization problem, and the minimum required thicknesses were obtained. Finally, the new optimized design was validated by comparing different finite element simulations with the exact analytical equations. By using this type of structure, a 53% weight reduction was achieved on the floor panel which ultimately led to an estimated 12.5% reduction in the weight of the whole freight railcar body.

Predictions of airborne noise between unit cabins by developing a cavity transfer matrix

2021 ◽  
Vol 69 (3) ◽  
pp. 229-242
Author(s):  
Jae-Deok Jung ◽  
Suk-Yoon Hong ◽  
Jee-Hun Song ◽  
Hyun-Wung Kwon
Keyword(s):  
Transfer Matrix ◽  
Sandwich Panel ◽  
Thickness Ratio ◽  
Sound Insulation ◽  
Parameter Study ◽  
The Core ◽  
Airborne Noise ◽  
Core Thickness ◽  
Panel Thickness ◽  
Insulation Performance

The unit cabin has been used to construct internal ship space for improved efficiency and to reduce budgetary costs in shipbuilding. Because the cavity is placed between unit cabins, the noise of one room is transmitted through the sound insulating panel, the cavity, and the opposite sound-insulating panel. In this study, by developing a transfer matrix of the cavity between structures, airborne noise between unit cabins was predicted. A sandwich panel, which is usually used in ships, was employed to construct a double panel, and the sound insulation performance was confirmed by changing the thickness of the cavity. To improve the reliability of numerical results, they were compared with those from experiments conducted. The results showed that as the cavity size increases, the overall sound insulation performance improves. A parameter study was also conducted on the density, Young's modulus, thickness, and thickness ratio of the core of the sandwich panel. To improve the sound insulation performance, increasing the density of the core is preferable to increasing the core thickness. The panel thickness ratio should be increased to avoid performance degradation as a result of the resonance frequency.

Static mechanical response of sandwich panels with bilinear core

2018 ◽  
Vol 22 (7) ◽  
pp. 2421-2444
Author(s):  
Guangtao Wei ◽  
Lijia Feng ◽  
Linzhi Wu
Keyword(s):  
Theoretical Model ◽  
Sandwich Structure ◽  
Sandwich Panel ◽  
Mechanical Response ◽  
Constitutive Relations ◽  
Plastic Region ◽  
Sandwich Panels ◽  
High Order ◽  
Isotropic Hardening ◽  
The Core

A new theoretical model based on the extended high order sandwich panel theory is established to predict the mechanical response of sandwich panels under static loads with the bilinear constitutive stress–strain relation in the core. The constitutive relations of normal stresses related to the longitudinal and vertical normal strains in the bilinear isotropic hardening core are first formulated. The influence of the in-plane rigidity on the elastoplastic response of sandwich structures is analyzed. An in-plane loaded sandwich structure with the bilinear core is first studied based on extended high order sandwich panel theory, and the effect of the bilinear ratio on the mechanical response is evaluated. The governing equations are derived from the principle of minimum potential energy, and a Ritz-based half-analytical method is applied to get the solutions. The plastic response is acquired by an iterative procedure along with the convergence criteria. The results reveal that the local effect can be captured when the axial rigidity of the core is considered. The bilinear characteristic of the core decreases the maximum normal stress with an increase of the average value. The equivalent plastic region extends with the increase of the bilinear ratio when the sandwich structure is loaded in plane. By comparison with open literatures and finite element results, the present theoretical model is proved to be effective and efficient.

Finite Element Analysis of Rotary Kiln Cylinder

2011 ◽  
Vol 228-229 ◽  
pp. 174-178 ◽  
Author(s):  
Xian Zhao Jia ◽  
Zhi Wen Zhang ◽  
Hong Bin Liu
Keyword(s):  
Finite Element ◽  
Rotary Kiln ◽  
Maintenance Cost ◽  
Chemical Production ◽  
Close Attention ◽  
Element Analysis ◽  
Design And Optimization ◽  
Finite Element Software ◽  
The Core ◽  
Status Analysis

As the core equipment of the metallurgy, cement, chemical production enterprises, the mechanics status analysis of rotary kiln cylinder is paid close attention on engineering site because of its frequent damage and expensive maintenance cost. With two supporting the lime rotary kiln was studied in the paper, the cylinder shell, kiln lining and materials were looked as a whole system, the cylinder and kiln lining were modeled with lamination and partition, the various factors to stress of the kiln cylinder were researched, such as the cylinder axial thickness, the cylinder axial materials and materials in it, the finite element software ANSYS was used to analyze the structure stress and thermal stress distribution status of cylinder, the analysis results are helpful for the design and optimization of rotary kiln cylinder.

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