Inspired by the cellular materials in nature, we studied the effect of the gradient of
cell distribution on the mechanical properties of honeycombs by using the finite
element methodology. Four honeycombs, namely regular honeycombs, linear graded
honeycombs, and two nonlinear graded honeycombs, were modeled. An indicator of
deformation uniformity was proposed to characterize the dynamic deformation status
of various honeycomb structures. The dynamic responses, including crushing mode,
stress-strain relation, and energy absorption, were compared by changing the type of
cell distribution and impact velocity. It is found that the honeycomb with the
nonlinear graded cellular structure possesses a smoother crushing process due to the
existence of a high-density frame. Nonlinear graded honeycombs present
better dynamic performances at lower impacting velocity, like plateau stress
and energy absorption. When the loading velocity is higher, the nonlinear
graded honeycombs have more stable dynamic responses than the regular
honeycomb, like plateau stress, dynamic increment factor, and specific energy
absorption.
PDF Access Denied
We have not been able to recognize your IP address
98.84.18.52
as that of a subscriber to this journal.
Online access to the content of recent issues is by
subscription, or purchase of single articles.
Please contact your institution's librarian suggesting a subscription, for example by using our
journal-recommendation form.
Or, visit our
subscription page
for instructions on purchasing a subscription.