Damage Evaluation with P-Wave Velocity Measurements during Uniaxial Compression Tests on Argillaceous Rocks

摘要: In the study of time dependent behavior rock, main difficulty is to predict delayed failure, which utmost importance in assessing safety underground structures, such as deep facilities designed for high-level radioactive waste disposal. this context, viscoplastic associated with rock damage must be taken into account. As longitudinal and transversal wave velocities are related physical mechanical characteristics materials, ultrasonic measurements can give valuable information about development damage. study, P-wave velocity were used monitor evolution during uniaxial strain controlled compression tests long-term creep tests. These performed using sensors a piezoelectric copolymer polyvinyl-difluoride, placed on both ends cylindrical specimens. Throughout experiments, dilating an argillite could correlated decrease of...