1. Department of Mechanical Engineering,Materials and Structures Research Centre,University of Bath,Bath, BA2 7AY, UKe-mail: B.S.Cox@bath.ac.uk
2. Bristol Composites Institute (ACCIS),University of Bristol,Bristol, BS8 1TR, UKe-mail: Rainer.Groh@bristol.ac.uk
3. Bristol Composites Institute (ACCIS),University of Bristol,Bristol, BS8 1TR, UKe-mail: Alberto.Pirrera@bristol.ac.uk