A moving wheel load induces a principal stress rotation (PSR) in pavement foundation
geomaterials including subgrade/subbase soils. Simulating such a stress condition is not
possible with stress path tests conducted with conventional cyclic triaxial (CT) equipment.
More complex stress paths such as a heart-shaped stress path are required to determine the
deformation characteristics of these under a PSR. A heart-shaped stress path can be
simulated on a soil specimen in cyclic hollow cylinder (CHC) tests via user-defined …