We present a double-yield-surface plasticity theory for transversely isotropic rocks that
distinguishes between plastic deformation through the solid matrix and localized plasticity …

Opalinus Clay is a stratified shale that exhibits anisotropic deformation properties. In this
work, the transversely isotropic deformation parameters of Opalinus Clay are summarized …

Understanding the elastic stiffness evolution of Opalinus Clay is necessary for predicting
ground deformation during the construction and operation of radioactive waste repositories …

Opalinus Clay is the designated host rock for a deep geological repository of radioactive
waste in Switzerland. The determination of its geo-mechanical properties relies heavily on …

Conceptualizing sophisticated measurement set-ups as well as testing and evaluation
procedures for laboratory experiments on anisotropic rocks requires a basic understanding …

Lang Liu Page 1 Characterizing and Modeling Elastic Stiffness Variation of Opalinus Clay Based
on Laboratory and In-situ Measurements by Lang Liu A thesis submitted in partial fulfillment of …

The insitu cavity expansion test is often used to determine the elastic stiffness of competent
rock. Such material will be put into tension but is unlikely to fail in shear at the loads that …

Knowledge of in situ stress magnitude and orientation plays a very important role in
geological/geotechnical engineering and in the development of energy resources, such as …

Over the last two decades, several high-profile caprock performance issues, such as surface
steam and fluid releases, have highlighted the importance of caprock integrity assessments …

In-situ stress is considered a key geomechanical parameter in the designs of subsurface
engineering projects. Hydraulic fracturing testing, as the conventional in-situ stress …