Bending properties of steel faced sandwich composite panels with phenolic foam cores

Abstract

This paper investigates the mechanical properties of a new type of sandwich composite panel composed of two steel faces and a phenolic foam core under uniformly distributed load. Two groups of full-scale phenolic foam sandwich panels, which are classified as thin faced wall panels and thick faced roof panels, are tested by vacuum chamber loading method. The general formulae for calculating deformation and load bearing capacity are derived from the force-deformation relationships of differential equations, where the calculation of thin faced sandwich panels can be regarded as a special case of thick faced sandwich panels. Based on these formulae, the bending moment partition coefficient and shear partition coefficient are given for simplified calculation in design. The finite element method with software ABAQUS is used to verify the results from theoretical formulae and tests. By comparing these results, a good agreement is obtained. The sensitivity analyses show that the thin faced wall panels are very sensitive to initial geometrical imperfection, whereas the thick faced roof panels are not.

Vibro-Acoustic Characterization of a Composite Structure Featuring an Innovative Phenolic Foam Core

“…It can be observed that they do not vary significantly with frequency, which is the expected behavior in the case of a homogeneous beam. The average value of E = 108 MPa is inserted into Equation (14) to compute the shear modulus, which, together with the characteristics reported in Table 3, is used to calculate coefficients A, B and C through Equations (4). Finally, the sound transmission loss for an infinite, isotropic structure has been obtained by means of Equation (3) and Equations (5)- (8).…”

“…In their analysis, the authors performed flexure and compression tests according to ASTM relevant standards, and not only did they provide numerical results, but they also examined the failure mechanisms associated to each structure shape and composition. Tang et al [14] investigated the properties of sandwich panels with two steel laminates and a phenolic foam core under uniformly distributed load, by testing full specimens according to vacuum chamber loading method and examining the failure mechanisms step-by-step. A simplified theoretical model, based on Timoshenko composite beam theory and validated by the experimental tests and by finite-element analysis, was given for the calculation of bending moment, shear force, deformation, load-bearing capacity and local buckling at a design stage.…”

Flexural Behaviour of Precast Steel Fibres Reinforces Concrete Composite Slabs with Different Shapes

“…[14] carried out bend tests on concrete sandwich precast slab which consist of outer layers made from RAC and polystyrene was used as the insulation core material. Tang et al [15] studied steel faced sandwich composite panels in which phenolic foam was used as core in order to stronger fire resistance properties in residential building and cold-storage buildings.…”

Static analysis of co-cured composite structures with double-layer damping membranes embedded

“…There is a significant space for further improving structural optimization and mechanical properties of composite materials. 1–6…”

“…There is a significant space for further improving structural optimization and mechanical properties of composite materials. [1][2][3][4][5][6] A co-cured composite structure with double-layer damping membranes embedded (CCSDDME) is a new type of pre-processing damping structure that consists of a composite panel layer with damping material layers embedded into the composite. The composite structure with a damping layer created using a traditional process has disadvantages in that the interlayer bonding performance is poor, the damping material easily ages, and the damping layer thickness cannot be too thick.…”