Abstract
The impact peak force and the post-impact maximum permanent displacement of GLARE laminates with double holes are predicted with the goodness of fit above 0.98 within the impact energy range of 5–30J. The normalized post-impact residual fatigue life decreases exponentially with the increase of impact energy and the post-impact maximum permanent displacement. DIC analysis shows that delamination and local deformation promote crack initiation between two holes and simultaneous initiation of multi cracks. The compressive plastic deformation in the dent center hinders the fatigue crack propagation. A multiple fatigue source failure mode is observed with the increase of impact energy.
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