Dynamic plastic response of a submerged free-free beam to an underwater gas bubble |
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Authors: | Z Zong |
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Affiliation: | (1) Institute of High Performance Computing, 1 Science Park Road, 01-01 The Capricorn Singapore Science Park II, Singapore 117528 (E-mail: zongzhi@ihpc.a-star.edu.sg), SG |
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Abstract: | Summary. The dynamic plastic response of a submerged free-free beam to an underwater explosion bubble is studied in this paper. A
fluid-structure analysis is given to find the fluid force acting on the beam. Assuming that the beam is made from rigid, perfectly
plastic material, we obtain the hydroplastic equation governing the dynamic plastic deflection of such a beam. The equation
is analytically solved. Examples are given to discuss the features of the dynamic plastic response. It is observed that longer
beams sustain larger plastic deformations than shorter beams, but shorter beams undergo larger rigid body motion than longer
beams. Most of energy is consumed on plastic deformation rather than on rigid body motion. It is impossible, however, for
more than three hinges to form on the beam.
Received May 23, 2002; revised October 22, 2002
Published online: April 17, 2003 |
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