Abstract
The effects of simulated long-term exposure of carbon-fiber/epoxy (CFE) hollow cylinders to high pressure seawater were investigated experimentally. Utilizing accelerated life testing informed by the Arrhenius methodology, specimens were aged in 41.1 MPa (6000 psi) pressurized 3.5% saline water for durations representing 0, 193.5, and 516 days of service at 3 °C. Hydrostatically and explosively initiated implosion experiments were performed in a large pressure vessel simulating free field conditions. The events were recorded with high-speed stereo photography and analyzed using 3D digital image correlation (DIC) techniques. High frequency response pressure transducers captured a detailed pressure history of each event. Analysis of the collapse phenomena suggests that exposure to the abyssal environment at the timescales investigated had negligible effects on the response of CFE structures subjected to dynamic instability.
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