Let d 2 D = {1, . . . , 9}, and let k be a positive integer with gcd(k, 10d) = 1. Define a sequence {sn(k, d)}n=1 by sn(k, d) := k dd . . . d | {z } n k. We say k is a d-composite sandwich number if sn(k, d) is composite for all n 1. For a d-composite sandwich number k, we say k is trivial if sn(k, d) is divisible by the same prime for all n 1, and nontrivial otherwise. In this paper, we develo...

there exist simple theories to predict the strain of sandwich structures under a bending load and specific support conditions. although theoretical predictions are highly effective, but the role of testing in validation of these theories and their progress is undeniable. the main goal of the present paper is to prepare a test instruction in order to minimize the error of data acquisition and th...

In order to solve the problems of limited installation space and strict additional quality, effects internal distributed nonlinear energy sinks (NES) considering optimal locations on a composite truss core sandwich plate are investigated in this paper. Choose five NESs here inset them different places suppress vibration plate, which is excited by half-wave shock. The coupled dynamic equations s...

In composite plate structures, it is common to combine di erent materials with very di erent Young's moduli and densities. Damping treatments can also be added to prevent high levels of vibration. For discretized problems, the static and dynamic behavior of such heterogeneous structures can be carried out with the 3D elasticity theory but this often leads to very large systems. Therefore, plate...

Failure maps of sandwich panels such as beam, plate and shell are of great importance in designing such structures. In this paper, failure maps of sandwich beams with composite skin and honeycomb core are obtained. The effect of transverse shear in skins and core and the effect of double walls of honeycomb core have been taken into account. Shear deformation of skins and core are assumed to be ...

Recent results on fluid–structure interaction for plates subject to high intensity air shocks are employed to assess the performance of all-metal sandwich plates compared to monolithic solid plates of the same material and mass per area. For a planar shock wave striking the plate, the new results enable the structural analysis to be decoupled from an analysis of shock propagation in the air. Th...

A study on the static analysis of a naval panel made composite sandwich materials is presented. By using FEM, modeling floor with length 5 m and width 2.5 performed. Two distinct cases, have been performed: first model consists plate stiffeners steel second concerns material type / SANFoam103 steel, steel. parametric has The thickness faces 6 mm, for core SANFoam selected thicknesses 10 20 40 mm.

Journal of Composite Materials, Volume 48, May 2014, Pages 1337-1346 http://dx.doi.org/10.1177/0021998313485309 In-plane compression of hollow composite pyramidal lattice sandwich columns Sha Yin, Linzhi Wu, Steven Nutt 1. Center for Composite Materials, Harbin Institute of Technology, Harbin, China 2. Department of Chemical Engineering and Materials Science, University of Southern California, ...

Abstract Based on the technical study of a composite vertical tail, mechanical properties honeycomb sandwich structure at leading edge were studied fundamental computational analysis. The stress calculation and modal analysis beam/plate are carried out by using engineering algorithm two finite element modeling methods. comparative results shows that methods can effectively simulate structure. I...