Effects of cell aspect ratio and relative density on deformation response and failure of honeycomb core structure

Simple item page
dc.contributor.authorKhan, Muhammad Salman
dc.contributor.authorKoloor, Seyed Saeid Rahimian
dc.contributor.authorTamin, Mohd Nasir
dc.date.accessioned2020-04-03T12:31:14Z
dc.date.available2020-04-03T12:31:14Z
dc.date.issued2020-01
dc.description.abstractThe extensive applications of honeycomb (HC) core in sandwich structures necessitates the influence of the cellular geometry and cell wall base material on the mechanical response to be quantified. In this respect, this paper establishes the mechanics of the deformation and the failure processes of the HC core under the out-of-plane compressive, tensile, and shear loading. The corresponding mechanical properties are determined and the mechanisms of failure of the HC core structure are identified. The influence of the relative density (rho*/rho(s)) and the cell aspect ratio (H/c) of the hexagonal HC core on the compressive deformation response, the out-of-plane properties and the characteristic dissipation energy density (DED) of the structure is established. Results show that the compressive strength increases exponentially from 1.5 to 10.6 MPa over the relative density range of 0.028 <= (rho*/rho(s)) <= 0.125. The out-of-plane shear modulus, G(13) and G(23) are 33.9 and 58.2 MPa, while the shear strength, tau(13) and tau(23) are 1.07 and 2.03 MPa, respectively. The HC core with a low aspect ratio (H/c < 2.64) failed due to the early debonding of the double-wall hexagonal cells, while at H/c >= 2.64, by elastic buckling of the cells. A phenomenological model is formulated to highlight the combined effects of both parameters on the compressive strength (sigma(c)) of the HC cores, covering the range of 0.028 <= (rho*/rho(s)) <= 0.056 and 2.5 <= (H/c) <= 5.62. Furthermore, the characteristic dissipation energy density (DED) under the out-of-plane compression varies linearly within the range of 2.5 < (H/c) rho*/rho(s) = 0.056. The HC core with H/c = 3.96, but with twice higher rho*/rho(s) exhibits about twice larger DED. These resulting properties and failure mechanisms of the anisotropic paper-based HC core are useful for the validation of the predictive computational models.cs
dc.format.extent17 strancs
dc.identifier.doi10.1088/2053-1591/ab6926
dc.identifier.orcid0000-0002-1820-6379 Koloor, Seyed Saeid Rahimian
dc.identifier.urihttps://dspace.tul.cz/handle/15240/154696
dc.identifier.urihttps://iopscience.iop.org/article/10.1088/2053-1591/ab6926/meta
dc.language.isocscs
dc.publisherIOP PUBLISHING LTD, TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
dc.relation.ispartofMATERIALS RESEARCH EXPRESS
dc.subjectcell aspect ratiocs
dc.subjectcompressive strengthcs
dc.subjectdissipation energy densitycs
dc.subjectelastic moduluscs
dc.subjectfailure mechanismscs
dc.subjectNomex honeycomb corecs
dc.subjectrelative densitycs
dc.titleEffects of cell aspect ratio and relative density on deformation response and failure of honeycomb core structurecs
local.article.number15332
local.identifier.publikace7635
local.relation.issue1
local.relation.volume7
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Khan_2020_Mater._Res._Express_7_015332.pdf
Size:
2.66 MB
Format:
Adobe Portable Document Format
Description:
článek
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections