Page 438 - Biaxial Multiaxial Fatigue and Fracture

422 c! AUBIN, R QUAEGEBEUR AND S. DEGALLAIX

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Appendix: NOMENCLATURE

I Total strain tensor
Elastic strain tensor
Plastic strain tensor
Stress tensor
- Elasticity matrix
A
-
k Initial yield stress
R Isotropic hardening
- Kinematic hardening
X
-
A Non-proportionality parameter
E' Plastic strain vector in the deviatoric space (model TANA)
-
C Structural tensor (model TANA)
=
- Plastic strain direction (model TANA)
U
- Centre of the amplitude limit surface (model TANA)
Y
4 Radius of the amplitude limit surface (model TANA)
E, v, G Elastic parameters
CI, TI, c2, y2, w, Pm, Parameters describing the kinematic hardening
bi, Qi. Parameters describing the isotropic hardening
b2, d, f, % Qm, Qo, Qi. n Parameters describing the extra-hardening (model NP 1)
~3, ax, @, , CO, C,, Cx, n, tlx Parameters describing the extra-hardening (model NP2)
b2, ap, bp, cp, aN, bN, CN, c,, ry Parameters describing the extra-hardening (model TANA)