1 Survivability and Advanced Materials, Centre for Defence Engineering, Cranfeld University, Defence Academy of the United Kingdom, Shrivenham, SN6 8LA, UK. r.critchley@cranfeld.ac.uk.
2 National Centre of Advanced Tribology at Southampton (nCATS), Mechanical Engineering, Faculty of Engineering and Physical Sciences, University of Southampton, Highfeld, Southampton, SO17 1BJ, UK. r.critchley@cranfeld.ac.uk.
3 Applied Cognitive Science Group, Centre for Electronic Warfare, Information and Cyber, Cranfeld University, Defence Academy of the United Kingdom, Shrivenham, SN6 8LA, UK.
4 National Centre of Advanced Tribology at Southampton (nCATS), Mechanical Engineering, Faculty of Engineering and Physical Sciences, University of Southampton, Highfeld, Southampton, SO17 1BJ, UK.
5 nC2, Enterprise Consultancy Unit, University of Southampton, Southampton, SO17 1BJ, UK.