Title
Experimental studies on damage growth in composites under dynamic loads
Document Type
Article
Date of Original Version
3-1-2001
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.
Publication Title, e.g., Journal
Applied Composite Materials
Volume
8
Issue
2
Citation/Publisher Attribution
Ravi, S., N. G. Iyengar, N. N. Kishore, and A. Shukla. "Experimental studies on damage growth in composites under dynamic loads." Applied Composite Materials 8, 2 (2001): 79-97. doi: 10.1023/A:1011269031799.