Abstract
A three-dimensional fully auxetic cellular structure with negative Poisson’s ratio is presented. Samples are fabricated from Ti6Al4V powder via selective electron beam melting. The influence of the strut thickness and the amplitude of the strut on the mechanical properties and the deformation behaviour of cellular structures is studied.
Highlights
Periodic cellular structures were first considered in the field of lightweight construction due to their high specific stiffness, damping and energy absorbing properties [1]
The mechanical properties and the deformation behaviour can be controlled by appropriate choice of the underlying unit cell [2, 3] and by adjusting the relative density [4]
Periodic structures based on various unit cells were studied experimentally [3, 6, 10,11,12,13,14], including the regular honeycomb [15], the cubic cell [3, 16] and the diamond lattice [17]
Summary
Periodic cellular structures were first considered in the field of lightweight construction due to their high specific stiffness, damping and energy absorbing properties [1]. Periodic structures based on various unit cells were studied experimentally [3, 6, 10,11,12,13,14], including the regular honeycomb [15], the cubic cell [3, 16] and the diamond lattice [17].
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