Numéro |
J. Phys. IV France
Volume 134, August 2006
EURODYMAT 2006 - 8th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading
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Page(s) | 819 - 826 | |
DOI | https://doi.org/10.1051/jp4:2006134126 | |
Publié en ligne | 26 juillet 2006 |
J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 819-826
DOI: 10.1051/jp4:2006134126
Quasi-static and impact tests of honeycomb
G. Gary1 and J.R. Klepaczko21 Laboratoire de Mécanique des Solides, CNRS UMR 7649, Département de Mécanique, École Polytechnique, 91128 Palaiseau, France
2 Laboratory of Physics and Mechanics of Materials, Metz University, 57045 Metz, France
Published online: 26 July 2006
Abstract
In this paper the quasi-static and instrumented
compression impact testing of two kinds of aluminum-alloy honeycomb are
reported. Those two types of honeycomb called Hard (H) and Soft (S) were
tested. The specimens in cubical form of dimensions 60 mm 60
mm
120 mm were made with and without the front aluminum alloy plates (thickness 1.0
mm) cemented to the specimen two faces. The tests have been performed along
the largest dimension that is 120 mm, which is parallel to the aluminum
sheet profiles forming the honeycomb. A wide range of compression velocities
from the quasi-static rate (V0 = 10 mm/min) to the highest impact velocity
V6 = 120 m/s were applied. The total number of velocities applied, including
the quasi-static loading, was six. Several series of tests were performed.
The first two were carried out with the flat-ended strikers of specific
masses, which were adequate to each impact velocity. In order to obtain an
adequate displacement of crushing the condition of constant kinetic energy
of a striker was assumed. In addition, conical strikers were applied with
the cone angle 120
. Application of the direct impact arrangement along
with properly instrumented 9m long Hopkinson bar of Nylon with diameter 80 mm enabled for a wave dispersion analysis to be applied. The crushing force
versus time could be exactly determined at the specimen-bar interface by
application of an inverse technique along with the theory of visco-elastic
wave propagation.
© EDP Sciences 2006