Table 1.

The average values for the fatigue crack growth parameters including the threshold stress intensity range (ΔK_th) and Paris Law constants (m, C)). Results are presented for the specimens receiving EDC cross-linking treatment during bonding (EDC) and those that did not (Control) at the three periods of storage.

SB adhesive system	0 months		3 months		6 months
Property	Control	EDC	Control	EDC	Control	EDC
ΔKth [MPa•m05]	a0.58±0.05	a0.54±0.1	b0.51±0.02	a0.53±0.02	b0.51±0.02	a0.54±0.02
M	a17.5±1.1	a17.0±1.3	b17.4±2.6	a16.7±2.0	b19.5±2.5	a17.2±1.5
C [(mm/cycle)(MPa•m05) −m]	a2.2 × 10−2	a4.2 × 10−2	b5.3 × 10−2	a7.1 × 10−2	b123 × 10−2	a7.6 × 10−2

SBMP adhesive system	0 months		3 months		6 months
Property	Control	EDC	Control	EDC	Control	EDC
ΔKth [MPa•m05]	a0.50±0.02	a0.51±0.02	a0.47±0.03	a0.48±0.03	a0.45±0.02	a0.49±0.03
m	a16.0±0.6	a16.8±0.2	a17.4±0.5	a15.8±1.3	b21.5±2.8	a14.1±3.2
C [(mm/cycle)(MPa•m05) −m]	a15.4 × 10−2	a6.9 × 10−2	a68.3 × 10−2	a5.9×10−2	b1410 × 10−2	a6.2 × 10−2