Abstract
Experimental investigations have been carried out to study the dynamic damage growth in glass/polyester composites. Detonation of two PETN explosive charges on a modified single edge notch (MSEN) specimen provides the dynamic load in the form of a planar tensile wave. High speed photography is used to record the dynamic damage events. The results show that damage grows perpendicular to the loading direction, similar to the static growth; the damage zone splits analogous to the crack branching in unreinforced polyester. The damage propagation velocity in a composite is higher than the crack propagation velocity in polyester resin. The damage area grows at an average rate of 4.3 m2/sec. Static experiments show that about 4 percent of the total energy is spent on the fiber-matrix interface debonding. The damage zone under dynamic loads is much higher than under static loads.
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Ravi, S., Iyengar, N.G.R., Kishore, N.N. et al. Experimental Studies on Damage Growth in Composites under Dynamic Loads. Applied Composite Materials 8, 79–97 (2001). https://doi.org/10.1023/A:1011269031799
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DOI: https://doi.org/10.1023/A:1011269031799