Dynamic versus quasi-static loading of X65 offshore steel pipes M. Kristoffersen, T. Børvik, M. Langseth and O.S. Hopperstad Eur. Phys. J. Special Topics, 225 2 (2016) 325-334 Published online: 14 March 2016 DOI: 10.1140/epjst/e2016-02629-4