Our study focuses on modeling the macroscopic
anisotropy of fatigue limit in fully reversed loading of two
tropical wood species, Azobe (Lophira alata Banks) and
Bilinga (Nauclea diderrichii Merr.). The proposed formula
for modeling anisotropy from the orthotropic directions of
wood is a rewrite of a symmetry plane formula (R, T) to
the plane of symmetry (L, R). This formula requires the
knowledge of three parameters: the fatigue limit in fully
reversed loading at 0°, the fatigue limit in fully reversed
loading at 90° and the shear modulus in the plane (L, R).
A discussion of the acuteness of the formula is made in
relation to the literature through its graphical
Keywords : Fatigue Limit. Symmetrical Alternating Traction. Anisotropy. Bois.