Numerical damage models using a structural approach: application in bones and ligaments P. J. Arnoux, J. Bonnoit, P. Chabrand, M. Jean and M. Pithioux Eur. Phys. J. AP, 17 1 (2002) 65-73 Published online: 15 January 2002 DOI: 10.1051/epjap:2001009