The purpose of this paper is to propose an optimization method for shape design Auxetic Bending-Active Gridshells (ABAGs). A 2-dimensional auxetic structure has negative Poisson’s ratio in-plane deformation. Positive Gaussian curvature distributed on a curved surface ABAG obtained by out-of-plane deformation the initial flat grid composed reentrant structural units. We introduce discrete differ...

In the search for axion dark matter, cavity-based haloscope offers most sensitive approach to theoretically interesting models in microwave region. However, experimental searches have been limited relatively low masses up a few tens of $\mu$eV, benefiting from large detection volumes and high quality factors given setup. We propose new cavity design suitable higher mass regions with enhanced pe...

This work describes large strain quasi-static and impact tests of a new class low-cost, uniaxially thermoformed, transverse isotropic auxetic foams with compression ratio ranging from 20 to 80%. A custom drop tower rig high-speed cameras suitable for these soft porous foam materials is designed used perform energy 0.38 1.90 J, corresponding rates 64/s 143/s. The thermoformed only show auxeticit...

Abstract Auxetic structures provide an interesting approach to solving engineering problems due their negative Poisson's ratio, which allows for elongation perpendicular applied stresses, opposite a conventional structure's necking behavior. Thus, they can function well in applications requiring compacting the device into small volume during deployment (e.g., implants inserted with catheters) o...

This paper aims to optimize vibro-acoustic response of (non-) auxetic sandwich panels by use topology optimization method. First, structural noise and vibration responses the panel with re-entrant hexagonal honeycomb core are studied. It is proved that interactions between vibrations induced more complex when expected for a low-frequency range, optimized reduction can be obtained proper combina...