The transition from elastic (reversible) to plastic (permanent) deformation.
The state parameter ( \psi = e - e_cs ) determines contractive (( \psi > 0 )) vs dilative (( \psi < 0 )) response. fundamentals of plasticity in geomechanics pdf
While these texts provide excellent mathematical clarity, they can be dense for practitioners. A common critique is the steep learning curve regarding and the transition from idealized laboratory behavior to the inherent variability of "real-world" soil deposits. fundamentals of plasticity in geomechanics pdf