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Shock-Initiated Buckling of Carbon/Epoxy Composite Tubes at Sub-Critical Pressures

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Abstract

A comprehensive investigation on the implosion of composite cylinders subjected to a nearby explosion is performed. Experiments are conducted in a large pressure vessel, designed to provide constant hydrostatic pressure throughout the event. Carbon fiber/epoxy filament-wound tubes are studied with constant hydrostatic pressure and varying charge standoff distances to determine the effect of the explosive loading on the mechanisms of collapse. 3-D Digital Image Correlation (DIC) is used to capture the full-field displacements and velocities during the implosion event, and to characterize the initial dynamic response of the tube. Dynamic pressure transducers measure the shock waves generated by the explosive and also the pressure pulse generated by the collapse. Results show that different magnitudes of explosive loading produce drastic differences in the way implosions are initiated, and in the extent of damage to the structure. Experiments with strong explosive loading show immediate collapse of the tube upon the arrival of shock wave. Relatively smaller explosive loading result in collapses due to the additional bubble pulse loading, or after accumulating damage for extended periods of time.

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Acknowledgments

The authors would like to acknowledge the Office of Naval Research and Dr. Yapa D.S. Rajapakse for providing financial support to conduct this research under Grant No. N00014-10-1-0662.

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Authors and Affiliations

  1. Dynamics Photomechanics Laboratory, Department of Mechanical, Industrial and Systems Engineering, University of Rhode Island, Kingston, RI, 02881, USA

    M. Pinto & A. Shukla

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  1. M. Pinto
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  2. A. Shukla
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Correspondence to A. Shukla.

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Pinto, M., Shukla, A. Shock-Initiated Buckling of Carbon/Epoxy Composite Tubes at Sub-Critical Pressures. Exp Mech 56, 583–594 (2016). https://doi.org/10.1007/s11340-015-0033-1

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  • DOI: https://doi.org/10.1007/s11340-015-0033-1

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