4.6 Article

Development of numerical realistic model for predicting low-velocity impact response of aluminium honeycomb sandwich structures

Journal

JOURNAL OF SANDWICH STRUCTURES & MATERIALS
Volume 18, Issue 1, Pages 95-112

Publisher

SAGE PUBLICATIONS LTD
DOI: 10.1177/1099636215603047

Keywords

Honeycomb sandwich structure; low-velocity impact; explicit finite element analysis

Funding

  1. Scientific and Technological Research Council of Turkey (TUBITAK) [112M917]
  2. Coordination Unit of Scientific Research Projects of Erciyes University [FYL-2013-4729]

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This paper presents the results of an experimental and numerical study on aluminium honeycomb sandwich structures under low-velocity impact loadings. In order to investigate the impact behavior of honeycomb sandwich structures, which is consisted of two identical aluminium facesheets and an aluminium honeycomb core, an experimental study was carried out by using a drop-weight impact test system. Using this system, the contact forces and absorbed energies were measured to determine the influence of impact energy for one configuration of the sandwich structure. According to these results, a numerical model by finite element method of sandwich structures was developed, which is in good agreement with experimental results in terms of contact forces and deformations. Later, the effect of the cell size and the height variation of aluminum honeycomb core on the impact response of sandwich structures were investigated using the improved numerical model. The obtained numerical and experimental results were interpreted in detail.

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