Cl. Chow et Xf. Chen, FAILURE ANALYSIS OF A CRACKED PLATE BASED ON ENDOCHRONIC PLASTIC THEORY COUPLED WITH DAMAGE, International journal of fracture, 60(1), 1993, pp. 49-63
An anisotropic model of damage mechanics for ductile fracture incorpor
ating the endochronic theory of plasticity is presented in order to ta
ke into account material deterioration during plastic deformation. An
alternative form of endochronic (internal time) theory which is actual
ly an elasto-plastic damage theory with isotropic-nonlinear kinematic
hardening is developed for ease of numerical computation. Based on thi
s new damage model, a finite element algorithm is formulated and when
employed to characterize the fracture of thin aluminum plate containin
g a center crack. A new criterion termed as Y(R)-Criterion is proposed
to define both the crack initiation angle and load. Experiments have
been conducted to verify the validity of the proposed damage model and
it is found that the theoretical crack initiation loads correspond cl
osely with the measured values.