Compressive Failure of Quasi-Static Indented CFRP / Aluminium Honeycomb Sandwich Panels

IOP Conference Series: Materials Science and Engineering 2019
Guntis Japiņš, Kaspars Kalniņš, Oļģerts Ozoliņš, Eduards Skuķis

The present study examines sandwich panels, which are made of carbon fiber facesheets with aluminium honeycomb core and focuses on how varying factors (skin thickness, layup, core density and diameter of hemispherical indenter) are affecting collapse of artificially damaged panels in edgewise compression. Damage in the middle of sandwich specimens was introduced using quasi-static indentation. Hemispherical indenters of two diameters, namely, 20 mm and 150 mm, were applied. The residual strength was estimated through the edgewise compression test of damaged specimens. The study demonstrated that increase of the honeycomb density led to decrease in the safety margin in structure. Thicker skins may also lead to a catastrophic propagation of indent.

Keywords
quasi-static; honeycomb; sandwich panels; carbon fiber; damage
DOI
10.1088/1757-899X/500/1/012007
Hyperlink
https://iopscience.iop.org/article/10.1088/1757-899X/500/1/012007

Japiņš, G., Kalniņš, K., Ozoliņš, O., Skuķis, E. Compressive Failure of Quasi-Static Indented CFRP / Aluminium Honeycomb Sandwich Panels. In: IOP Conference Series: Materials Science and Engineering, Latvia, Jurmala, 12-14 September, 2018. IOP PUBLISHING LTD, DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND: IOP Publishing, 2019, pp.1-7. ISSN 1757-8981. e-ISSN 1757-899X. Available from: doi:10.1088/1757-899X/500/1/012007

Publication language
English (en)