Dynamic response of auxetic structures

John Kennedy, Matthieu Proffit
2020 Vibroengineering PROCEDIA  
Auxetic materials have been investigated since the 1990's, they are defined by a negative Poisson's ratio which gives them interesting capabilities in energy and shock absorption. They are usually lattice structures (2D or 3D array of unit cells), which gives them high stiffness to weight properties and their properties can be tuned to suit a given application. Several papers have been published on new auxetic designs, their static equivalent mechanical properties, shock absorption properties
more » ... d their manufacturing. Their dynamic behavior has not been studied to date and this is the main purpose of this paper. We will present a novel design that facilitates 3D printing with SLA printers and then examine the dynamic behavior of an auxetic structure between 0 and 1 kHz. In order to explain the unusual behavior of the structure, an initial theoretical model of non-linear spring has been developed with partial success.
doi:10.21595/vp.2020.21440 fatcat:73r2u3dqhvbjfh3tzdnutblaka