Elastic wave propagation and dynamic delamination of carbon-fiber/expoxy laminates impacted with magnetic flyer plates
- Idaho National Lab., Idaho Falls, ID (United States)
Impact experiments have been conducted on carbon-fiber/epoxy laminated plates to characterize the propagation of Lamb waves and the resulting interfacial shearing stresses responsible for delamination. These experiments were conducted using a low frequency pneumatically-driven piston impacting a tup, which in turn, impacted the composite plate to generate a long duration, low intensity pulse. Recently a new dynamic loading system has been developed using thin magnetic flyer plates. These plates can be accelerated to very high velocities and generate short duration, high intensity pulses. The purpose of this investigation was to characterize the elastic wave propagation of these pulses in 0/90/ carbon-fiber/epoxy laminates with and without delaminations. Dynamic moir{var_theta} interferometry was used to capture displacement fields. Multiple interferograms were obtained during the interaction of stress waves with delaminations using a high-speed framing camera. A detector was designed to determine the velocity of the flyer plate at impact Specimens were subjected to various loading rates and input energies by controlling the flyer plate velocity. The elastic wave propagation and delamination behavior were then characterized as a function of pulse magnitude and duration. The results from this work will lead to a better understanding of the initiation, growth and arrest of delamination in laminated composites subjected to transient stress wave loading.
- OSTI ID:
- 175188
- Report Number(s):
- CONF-950686-; TRN: 95:006111-0108
- Resource Relation:
- Conference: Joint applied mechanics and materials summer meeting, Los Angeles, CA (United States), 28-30 Jun 1995; Other Information: PBD: 1995; Related Information: Is Part Of AMD - MD `95: Summer conference; PB: 520 p.
- Country of Publication:
- United States
- Language:
- English
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