Hu, "A study of negative Poisson's ratios in auxetic
honeycombs based on a large deflection model," European Journal of Mechanics, A/Solids, vol.
US Patent 8,277,719 (October 2, 2012), "Process for the Preparation of Auxetic
Foams," Andrew Alderson, Kim Lesley Alderson, Philip John Davies, and Gillian Mary Smart (Auxetic
Technologies Ltd., Great Britain).
Presentations will consider composites and magnesium plate, the use of carbon nanotubes and ceramics, the ballistic performance of titanium, multifunctional uses of auxetic
materials, the European Defence Agency's European protective individual defence armour project, and a systematic approach to armour development using Triz.
materials [1, 2] are those which when stretched expand rather than contract in width.
For negative Poisson's ratio material, the structures are commonly known as auxetic
structures, which are similar to a reentrant honeycomb structure .
Patent 7,858,055 (December 28, 2010), "Moisture Sensitive Auxetic
Material," WanDuk Lee, SangSoo Lee, CholWoh Koh, and Jin Heo (Kimberly-Clark Worldwide, Inc., Neenah, Wisconsin, USA).
materials have been fabricated since 1987  when Lakes produced a polymeric foam with a negative Poisson's ratio, [nu].
materials laterally expand under uniaxial tension or laterally shrink under uniaxial compression.
Recent publications have detailed how auxetic
(negative Poisson's ratio) polymers have been fabricated by a novel thermal processing route consisting of three well-defined stages--compaction, sintering and extrusion.
A highly fibrillar auxetic
form of ultra-high molecular weight polyethylene (UHMWPE) has been fabricated by using a powder processing route comprising two stages--sintering and extrusion.
Subsequently, the range of synthetic materials capable of existing in auxetic
forms has included polymer gels (2), molecular structures (3), and microporous polymers (4-6).
materials have a negative Poisson's ratio when stretched becoming thicker in a direction perpendicular to the direction of the applied force.