Auxetic materials – Project final report

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Authors
  1. Underhill, R.S.
Corporate Authors
Defence Research and Development Canada, Atlantic Research Centre, Halifax NS (CAN)
Abstract
The Canadian Army’s Soldier System 2030 plan will take advantage of advancements in technologies and materials to provide the most effective equipment to the dismounted soldier. This includes lightweight armour with improved performance. It has been postulated in the literature that negative Poisson’s ratio, auxetic materials may find application in an armour system, providing impact protection or behind armour blunt trauma mitigation. During the past four years, Defence Research and Development Canada (DRDC) has been exploring as a proof-of-concept, the physical properties of regular open cell polyurethane foams, compressed to form re-entrant structures. Finite element modelling of the foams has been performed to understand their response to compression. The project has also started to design various macromolecules as potential auxetic materials. This involved developing a multi-scale simulation for predicting physical properties, such as Poisson’s ratio, of compounds. Two potentially auxetic compounds were synthesized: calixarenes and bananaphase liquid crystals. Unfortunately both compounds were insoluble, preventing them from being processed into a form to measure their physical properties.

Il y a un résumé en français ici.

Keywords
auxetic;molecular simulation;negative Poisson’s ratio;armour;personal protective equipment;PPE
Report Number
DRDC-RDDC-2017-R128 — Scientific Report
Date of publication
01 Mar 2018
Number of Pages
33
DSTKIM No
CA045901
CANDIS No
806356
Format(s):
Electronic Document(PDF)

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