Auxetic Armour System for Protection Against Soil Blast Loading
PhD completion seminar by Steven Linforth
Threats to both civilian life and military personnel have rapidly evolved over recent years and require a similar quick response in the design of protective structures. With the prevalence of terrorist attacks and improvised explosive device (IED) threats, this research looks at how to quantify and protect against extreme blast loading. In particular, soil blast loading is one such threat which is often not studied. This research examines soil blast loading and has characterised its outputs through a series of flying plate tests and modelled using finite element software LS-DYNA. The Arbitrary-Lagrangian Eulerian (ALE) method has been utilised to simulate the soil blast event. Additionally, experimental and numerical studies were conducted on an auxetic (negative Poisson’s ratio) structure which showed favourable energy absorption characteristics. Auxetics, with their unique characteristics, are able to densify under a load, offering smarter and increased protection. A method was developed showing how these auxetic structures can be used to protect against soil blast threats and their benefit over conventional structures. These results can be used to better understand other auxetic armour systems and how soil blast loading interacts with armour systems.
Steven Linforth, PhD candidate