Fracture, Fatigue, and Notch Behavior of PEEK - PEEK Biomaterials - page 69

Figure 5.14 Magnified views of
the regions in Fig. 5.13 :(a)
Fracture initiation site showing
coalesced voids; (b) further
magnified view showing the
ductile nature of the coalesced
voids; (c) patchwork
morphology indicative of
crazing; (d) fast fracture region.
Courtesy of Ref. [38] .

(a) (c)

(b) (d)

Figure 5.15 Experimental data and regression curves based on the Basquin relationship for three notch geometries of
PEEK 450G tested in fatigue. Courtesy of Ref. [39] .

Figure 5.16 Representative fracture surfaces of notched PEEK 450G fatigue specimens. Courtesy of Ref. [39] .