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Wave Propagation in Sandwich Structures
Viewed 353 times since Tue, Sep 6, 2011
An analytical model for wave propagation in a three-layered sandwich structure with different boundary conditions was developed.  Read More
Wave Propagation in Sandwich Structure
Viewed 1053 times since Sun, Aug 21, 2011
An analytical model for wave propagation in a three-layered sandwich structure with different boundary conditions was developed.  Read More
USE OF GENETIC ALGORITHMS FOR OPTIMAL DESIGN OF LAMINATED COMPOSITE SANDWICH PANELS WITH BENDING-TWISTING COUPLING
Viewed 391 times since Tue, May 8, 2012
A genetic algorithm approach is used for optimization of a cantilever sandwich plate (an idealization of an airfoil) with a vertical force applied to one free corner. The number of face sheet plies and the ply orientations are designed so as to... Read More
Thermal Behavior of a Titanium Honeycomb-Core Sandwich Panel
Viewed 713 times since Sun, Oct 28, 2012
F! _ite element thermal stress analysis was performed on a rectangular titanium honeycomb-core sandwich panel which is subjected to thermal load with a temperature gradient across its depth. The distributions of normal stresses in the face sheets and... Read More
The basics on bonded sandwich construction
Viewed 899 times since Fri, May 25, 2012
The usual objectives of a sandwich design are to save weight, increase stiffness and reduce overall cost. In addition, there may be other objectives such as achieving aerodynamic smoothness or visually attractive flatness, reducing reflective noise,... Read More
STRESS ANALYSIS OF TAPERED SANDWICH PANELS WITH ISOTROPIC OR LAMINATED COMPOSITE FACINGS
Viewed 306 times since Mon, Jun 17, 2013
Structural sandwich construction is used in many air and space vehicles, cargo containers, boats and ships. Connection of the sandwich construction component to a framework or substructure is a critical issue in the detail design for sandwich... Read More
STRENGTH PREDICTION OF NOTCHED THIN-SKIN HONEYCOMB SANDWICH STRUCTURES
Viewed 275 times since Tue, May 7, 2013
In a composite material under tension or compression loading, a damage zone (DZ) is developed in front of a notch prior to failure. Recent research indicates that the DZ manifests itself in the form of strain-softening material behavior. This paper... Read More
Strength of Laterally Loaded Sandwich Panels with a Debond - Experiments and FE Modelling
Viewed 318 times since Tue, May 7, 2013
The sandwich principle is a highly weight efficient construction method. Sandwich structures are fairly susceptible to flaws in the face-to-core interface. Face-to-core debonds are one common form of flaws in sandwich structures. The aim of this work... Read More
STRENGTH AND BUCKLING OF SANDWICH BEAMS WITH CORRUGATED CORE
Viewed 262 times since Fri, Aug 2, 2013
The subject of the paper is a sandwich beam with a crosswise or lengthwise corrugated core. The beam is made of an aluminium alloy. The plane faces and the corrugated core are glued together. Geometrical properties and rigidities of the beams are... Read More
STATIC AND DYNAMIC FINITE ELEMENT ANALYSIS OF SANDWICH STRUCTURES
Viewed 363 times since Sun, Dec 16, 2012
The finite element method is extended to the refined elastic analysis of multilayer beams and shells with no restriction placed upon the ratios of the layer thicknesses and properties. The method is applicable to structures wherein shearing... Read More
Shell Element for Geometrically Non-Linear Analysis of Composite Laminates and Sandwich Structures
Viewed 276 times since Thu, Jun 7, 2012
This paper deals with a finite element formulation of a 4-node element for geometrically non-linear (GNL) analysis of layered shell structures. The element employs the MITC approach proposed by Dvorkin& Bathe [1] in order to eliminate the problem... Read More
Shear Buckling of Sandwich, Fiber Composite and Lattice Columns, Bearings, and Helical Springs: Paradox Resolved
Viewed 336 times since Thu, Jun 7, 2012
As shown three decades ago, in situations where the initial stresses before buckling are not negligible compared to the elastic moduli, the geometrical dependence of the tangential moduli on the initial stresses must be taken into account in... Read More
Shear behavior of aluminum lattice truss sandwich panel structures
Viewed 460 times since Thu, Jun 7, 2012
Age hardenable 6061 aluminum tetrahedral lattice truss core sandwich panels have been fabricated by folding perforated sheets to form highly flexible cellular cores. Flat or curved sandwich panels can be fabricated by furnace brazing the cores to... Read More
Sandwich structures
Viewed 597 times since Thu, Jun 7, 2012
Sandwich panels offer high stiffness at low weight. Their cores, commonly, are made of balsa-wood, foamed polymers, glue-bonded aluminum or Nomex (paper) honeycombs. These have the drawbacks that they cannot be used much above room temperature, and... Read More
Rapid Inspection of Composite Skin–Honeycomb Core Structures with Ultrasonic Guided Waves
Viewed 262 times since Tue, Sep 25, 2012
Guided wave inspection of composite skin–honeycomb core structures is an efficient and sensitive alternative to other common inspection methods. This paper shows that sweeping experimentally through the dispersion curves is an effective way to... Read More
PERFORMANCE OF AUTOMATED ULTRASONIC INSPECTION OF LARGE-SCALE SANDWICH STRUCTURES IN NAVAL SHIPS
Viewed 267 times since Fri, Oct 26, 2012
On basis of the successfull ultrasonic developing work performed within the EUCLID RTP3.21 project [1] and the JP 3.23 THALES project [2], it has now been possible to make clear detection of defects in GRP, CFRP, PVC foam and Balsa wood sandwich... Read More
Naval Applications of Laser-Welded Metallic Sandwich Panels
Viewed 232 times since Sun, Mar 3, 2013
Laser-welded metallic sandwich panels are stiff, lightweight structures that offer the Navy corrosion resistance, reduced weight, less distortion and cost effectiveness. The design is similar to corrugated cardboard and consists of two sheets of... Read More
Macromechanics - Sandwich Ratio Graphs
Viewed 269 times since Sun, Jan 20, 2013
Km for Sandwich Panels with All Edges Simply Supported and IsotropicCore; for Sandwich Panels with Ends and Sides Clamped and Isotropic core Read More
Investigation on the square cell honeycomb structures under axial loading
Viewed 357 times since Thu, Oct 18, 2012
To investigate into the collapse of a sandwich panel or beam with a square cell honeycomb, the novel plate model and beam model are developed according to the cross-sectional symmetry of the cell. The treble series solution of buckling mode is... Read More
FAILURE OF SANDWICH STRUCTURES WITH SUB-INTERFACE DAMAGE
Viewed 254 times since Sat, Apr 13, 2013
This thesis addresses some aspects concerned with fatigue behaviour and damage tolerance of foam core sandwich structures with composite faces. Two different foam cores typically used in aeronautical and marine applications are considered. The focus... Read More
Experimental Investigation and Design of Sandwich Panels Subject to Local Buckling Effects
Viewed 347 times since Tue, Apr 10, 2012
The use of sandwich panels in Australia has increased significantly in recent years due to their widespread structural applications in building systems. Structural sandwich panels generally used in Australia comprise of polystyrene foam core and... Read More
Elastic Coupling Effects in Tapered Sandwich Panels with Laminated Anisotropic Composite Facings
Viewed 301 times since Sun, Mar 4, 2012
A newly developed theory for the analysis of tapered sandwich panels with laminated anisotropic facings is presented. Unlike sandwich panels of uniform depth, the response of tapered sandwich panels is counterintuitive. For example, prior studies... Read More
Efficient Design and Analysis of Lightweight Reinforced Core Sandwich and PRSEUS Structures
Viewed 147 times since Mon, Feb 16, 2015
Design, analysis, and sizing methods for two novel structural panel concepts have been developed and incorporated into the HyperSizer Structural Sizing Software. Reinforced Core Sandwich (RCS) panels consist of a foam core with reinforcing composite... Read More
EFFECT OF TRANSVERSE SHEAR DEFORMATION ON ELASTIC RESPONSE OF SANDWICH COMPOSITE PLATES
Viewed 434 times since Sun, Feb 12, 2012
In sandwich composite plates the effects of the transverse shear deformation are often significant. For this reason, the results of the first-order shear deformation theory (FSDT) can be severely affected by the choice of the shear correction factor ... Read More
Effect of Core Material Stiffness on Sandwich Panel Behavior Beyond the Yield Limit
Viewed 458 times since Fri, Aug 26, 2011
Abstract—Sandwich panels attracted designer's interest due to its light weight, excellent corrosion characteristics and rapid installation capabilities. Sandwich panels have been implemented in many industrial applications... Read More
Delamination buckling and propagation analysis of honeycomb panels using a cohesive element approach
Viewed 386 times since Tue, Dec 20, 2011
The cohesive element approach is proposed as a tool for simulating delamination propagation between a facesheet and a core in a honeycomb core composite panel. To determine the critical energy release rate (Gc) of the cohesive model, Double... Read More
Damping Analysis of a New Sandwich Structure
Viewed 317 times since Thu, Dec 15, 2011
The aim of the paper is to determine the most important features of damping in the case of an advanced sandwich composite structure starting from the dampings, dynamic Young moduli and Poisson ratio for every lamina. The structure... Read More
DAMAGE TOLERANCE OF COMPOSITE SANDWICH AIRFRAME STRUCTURES
Viewed 403 times since Thu, Dec 15, 2011
Sandwich constructions are widely used in airframe structural applications due to the distinct advantages they offer over other metallic and/or composite (monolithic laminate) structural configurations in terms of stiffness, stability,... Read More
Crush dynamics of square honeycomb sandwich cores
Viewed 399 times since Sat, Nov 26, 2011
Square honeycombs are effective as cores for all-metal sandwich plates in that they combine excellent crushing strength and energy absorption with good stiffness and strength in out-of-plane shear and in-plane stretch. In applications where... Read More
CRASH ANALYSIS OF AN IMPACT ATTENUATOR FOR RACING CAR IN SANDWICH MATERIAL
Viewed 468 times since Sat, Nov 26, 2011
Aluminium sandwich construction has been recognized as a promising concept for structural design of lightweight transportation systems. The aim of the present study is to investigate, experimentally and numerically, the energy absorbing... Read More
CORE MATERIALS – PART I: THE MEAT OF THE SANDWICH
Viewed 334 times since Sat, Nov 26, 2011
Composite materials are all about choosing just the right material for the job and putting it in just the right place in the right way so that the properties of the entire structure will be better with the materials in combination than with... Read More
COMPRESSIVE BUCKLING CURVES FOR SANDWICH CYLINDERS HAVING CRUCTROPIC FACINGS
Viewed 291 times since Sat, Nov 26, 2011
Design curves are presented for determining the axial buckling stress of sandwich cylinders having orthotropic facings and orthotropic cores. They apply particularly to sandwich having glass-fabric laminate facings and honeycomb cores.... Read More
COMPRESSIVE BUCKLING CURVES FOR FLAT SANDWICH PANELS WITH DISSIMILAR FACINGS
Viewed 326 times since Sat, Nov 26, 2011
In this report are presented curves and formulas for use in calculating the buckling of flat, simply supported panels of sandwich construction under edgewise compressive loads. The curves apply particularly to sandwich panels having... Read More
Comprehensive overview of Theories for Sandwich Panels
Viewed 644 times since Sat, Nov 26, 2011
This paper gives a comprehensive overview of theories for sandwich panels, dealing with the mechanical behaviour. The classical theories are mainly formulated during the fifties and sixties. The derived analytical solutions are based on... Read More
Collapse of clamped and simply supported composite sandwich beams in three-point bending
Viewed 333 times since Tue, Nov 8, 2011
Composite sandwich beams, comprising glass–vinylester face sheets and a PVC foam core, have been manufactured and tested quasistatically. Clamped and simply supported beams were tested in three-point bending in order to investigate the initial... Read More
Buckling of laminated sandwich plates using an efficient plate model
Viewed 264 times since Fri, Aug 2, 2013
Buckling of laminated sandwich plates is studied using an efficient finite element plate model recentlydeveloped by the authors. The plate model is based on a refined higher order shear deformation theory, where the transverse shear stresses are... Read More
BUCKLING OF GFRP SANDWICH WEBS UNDER COMBINED BENDING AND SHEAR LOADS
Viewed 316 times since Fri, Aug 2, 2013
An analytical  investigation  of the buckling/wrinkling  behavior  of GFRP webs in cell-core sandwiches  subjected to combined in-plane shear and bending stresses is conducted. Web- core panels are modeled as long orthotropic... Read More
Behaviour of Laminated Fibre Composite Sandwich Girders
Viewed 359 times since Sat, Apr 19, 2014
d  composite  sandwich  beams  based  on  orientation  and  the  number  of laminations. The failure modes and loads were numerically modelled and predicted analytically.  The  sandwich ... Read More
ADVANCEMENTS IN ENGINEERED COMPOSITE SANDWICH CORE MATERIALS
Viewed 537 times since Sat, Sep 24, 2011
Results are presented for product and design innovations involving TYCORĂ’ fiber-reinforced foam (FRF) core technology for composite sandwich construction. Low-cost FRF core-preforms used with infusion molding processes provide light, stiff... Read More
Accounting for glue and temperature effects in Nomex based honeycomb models
Viewed 401 times since Tue, Sep 13, 2011
To predict the effect of active control on aircraft or helicopter trim panels, made with honeycomb sandwich composite, one approach consists in modeling the panel by Finite Element Method. FEM with shell elements  for the laminate and... Read More
A Study of Indentation Energy in Three Points Bending of Sandwich beams with Composite Laminated Faces and Foam Core
Viewed 451 times since Tue, Sep 13, 2011
This paper deals with analysis of flexural stiffness, indentation and their energies in three point loading of sandwich beams with composite faces from Eglass/epoxy and cores from Polyurethane or PVC. Energy is consumed in three stages... Read More
A Dynamic Probe for Validating Simulations of Shock Loaded Metallic Sandwich Panels
Viewed 437 times since Sat, Aug 20, 2011
Stainless steel sandwich structures with square honeycomb cores have been subjected to localized high pressure/short duration impulses by using a dynamic probe consisting of an Al-alloy foam projectile. The experiments have been designed to... Read More