Figure 16
(a) Phase lag (δ) is the angular difference between peak strains and
peak stresses. Values for tensile and compressive oscillations may be
determined. (b) Phase lag δ, plotted as tan δ, for the tensile
(
)
and compressive (
)
half cycle obtained from bovine PDL specimens. Vertical bars indicate
±1 SD, reproduced from Sanctuary et al. [26], by permission.
