Free-slit shielding of stress waves by the photoelasticity method

Journal Article · Thu May 01 04:00:00 EDT 1986 · Sov. Min. Sci. (Engl. Transl.); (United States)

OSTI ID:5604534

Freishist, N A; Dmitrienko, O L

This paper is devoted to the study of an experimental model investigation of the distribution of dynamic stresses beyond a free shielding slit as a longitudinal wave from a blast source strikes the shield. The studies were conducted by the method of photoelasticity on a dynamic polarization apparatus in the stress-study laboratory at the Moscow V.V. Kuibyshev Civil Engineering Institute. The problem was solved in the plane elastic statement on models in the form of plates made of an optically sensitive epoxy-resin-base material. The pulse effect was created by the detonation of a cylindrical lead azide microcharge. The dynamic stressed state at internal points of the model was evaluated from the magnitudes and distribution of maximum tangential stresses, and on the free perimeter of the model from the magnitudes and distribution of the normal stress parallel to the perimeter. The experimental studies indicated that a zone in which the stress amplitude is reduced as compared with the nominal stresses exists beyond the slit in all cases examined. The investigations made it possible to evaluate these relationships within the range of parameters under consideration.

• Research Organization: Civil Engineering Institute, Moscow
• OSTI ID: 5604534
• Journal Information: Sov. Min. Sci. (Engl. Transl.); (United States), Journal Name: Sov. Min. Sci. (Engl. Transl.); (United States) Vol. 21:4; ISSN SMNSA
• Country of Publication: United States
• Language: English

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