1. Geomechanics Department, Sandia National Laboratories, P.O. Box 5800, Mail Stop 0751, Albuquerque, New Mexico 87185, kchang@sandia.govhyoon@sandia.gov
2. Engineering Sciences Center, Sandia National Laboratories, P.O. Box 5800, Mail Stop 0836, Albuquerque, New Mexico 87185, mjmarti@sandia.gov