A NOTE ON THERMOMECHANICAL ANISOTROPY OF CLAYS

Deep clays exhibit a pronounced strain anisotropy both during mechanic al loading as well as during heating and cooling at constant stress in drained isotropic conditions. During mechanical loading vertical stra in is larger than the horizontal one. During heating the vertical stra in is larger than the horizontal one within the elastic range; the opp osite is observed in the elasto-plastic range. The above described res ponse can be interpreted adopting a consistent rotational, kinematic h ardening thermo-elasto-plastic constitutive law.