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Longitudinal Strain Pulse Propagation in Wide Rectangular Bars: Part 2—Experimental Observations and Comparisons With Theory

Jones, O. E. and Ellis, A. T. (1963) Longitudinal Strain Pulse Propagation in Wide Rectangular Bars: Part 2—Experimental Observations and Comparisons With Theory. Journal of Applied Mechanics, 30 (1). pp. 61-69. ISSN 0021-8936. doi:10.1115/1.3630106.

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The plane-stress theory presented in Part 1 is shown to predict qualitatively the warping of plane sections observed in transient fringe patterns obtained using birefringent coatings and in dynamic photoelastic pictures obtained in other investigations. Measurements using conventional techniques are described in which wide rectangular bars were subjected to a longitudinal step-function pressure loading produced by a shock tube. Comparisons show that the gross features of the experimental records for the head of the pulse are qualitatively predicted by the theory. Both theory and experiment show that short-wavelength, second-mode disturbances arrive very early. Experimentally it is observed that these disturbances are accomplished by thickness-mode activity which cannot be accounted for by the plane-stress theory.

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Additional Information:Copyright © 1963 by ASME. The results presented here were obtained in the course of research sponsored in part by U. S. Naval Ordnance Test Station Contract N123(60530)24917A and National Science Foundation Grant G-2586. Contributed by the Applied Mechanics Division for presentation at the Winter Annual Meeting, New York, N. y., November 25-30, 1962, of the American Society of Mechanical Engineers. Manuscript received by ASME Applied Mechanics Division, June 12, 1961. Paper No. 62--WA-70.
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U. S. Naval Ordnance Test StationN123(60530)24917A
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Hydrodynamics Laboratory183
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Deposited On:26 Aug 2014 17:14
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