Abstract
The high strain-rate compressive behavior of a unidirectional carbon/epoxy (T700/2521) composite in all three principal material directions (or fiber, in-plane transverse and thickness directions) is investigated using the stress reversal split Hopkinson pressure bar. To avoid uncertainties related to size effects, the specimens in all the tests have the same geometry, i.e., cubic specimen of nominal size 8 mm. The low and medium strain-rate compressive characteristics are measured using an Instron testing machine. It is shown that the ultimate compressive strength exhibits the positive strainrate sensitivity, while the ultimate compressive strain (or failure strain) and the absorbed energy up to failure exhibit the negative one in all three directions. The failure mechanisms of the test composite are discussed. The present study provides important data for the design of composite structures in high strain-rate applications.
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Schedule a callMore From: The Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics
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