Publisher : The Korean Society of Mechanical Engineers
DOI : 10.22634/KSME-A.19184.108.40.2066
Title & Authors
Effects of Impact Loading Rate on the Delamination Behavior of Composite Laminates Choe, Nak-Sam;
The delamination behavior of multidirectional carbon-fiber/epoxy composite laminates under 10NA intermediate and high rates of test, up to rate of about 11.4m s has been investigated using the double cantilever beam specimens. The mode I loading under rates above l.0m/s showed considerable dynamic effects on the load-time curves and thus higher values of the average crack velocity than that expected from a simple proportional relationship with the test rate. The modified beam analysis utilizing only the opening displacement and crack length exhibited an effective means for evaluating the dynamic fracture energy . Based on the assumption of constant flexural modulus, values of at the crack initiation and arrest were decreased with an increase of the test rate up to 5.7m/s, but the maximum was increased at 11.4m/s.
Impact Test Under Low and High Rates;Multidirectional Laminates;Mode I Delamination;Modified Beam Analysis;Fracture Energy;Crack Velocity;Crack Jumping;
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