Page 76 - Biaxial Multiaxial Fatigue and Fracture

Multiaxial Fatigue Assessment of Welded Structures by Local Approach 61

13. Sonsino, C.M. and Kueppers, M. (2001). "Fatigue behaviour of welded aluminium under
multiaxial loading". Sixth International Conference on BiaxialMultiaxial Fatigue and
Fracture, Lisbon, Portugal. De Freitas M. Editor. Vol. I, pp. 57-64.

Appendix : NOMENCLATURE

b fatigue strength exponent ; S-N curve slope
C kinematic hardening coefficient
C, kinematic hardening modulus
d', d, D fatigue damage related to one material plane, cycle, stress history
E Young's modulus
J1,32 joint size of fillet weld
K strength coefficient
K cyclic strength coefficient
Lpc, Lrc width of weld toe, weld root
n strain hardening exponent
-
n unit normal vector
n' cyclic strain hardening exponent
N fatigue life (number of blocks)
Nr fatigue life (number of cycles)
P cumulated plastic strain
Q, Y isotropic hardening parameter
R isotropic stress hardening
Ro isotropic stress hardening coefficient
bin mean value of transition radius
Rl, R2 transition radii
S height of the beads
t time ; plate thickness
T plate thickness
-
S deviatoric stress tensor
% kinematic stress hardening
P fatigue parameter

EP plastic strain
V Poisson's ratio