An Endochronic Plasticity Theory for Concrete.

Abstract An endochronic plasticity theory is developed which is intended to describe the nonlinear inelastic behavior of plain concrete over the stress range where significant cracking does not occur. The theory is isotropic and rate-independent. It exhibits the major features of concrete behavior, including shear-volumetric coupling, effect of hydrostatic compression on shear response, hardening, hysteresis and stress-path dependence. The theory is applied to, and successfully proof-tested against, an extensive set of complex multiaxial stress path data on plain concrete obtained by others using a true triaxial testing device.