Accession Number:

AD0260520

Title:

AN EXPERIMENTAL STUDY OF LONGITUDINAL STRAIN PULSE PROPAGATION IN WIDE RECTANGULAR BARS

Descriptive Note:

Corporate Author:

CALIFORNIA INST OF TECH PASADENA HYDRODYNAMICS LAB

Personal Author(s):

Report Date:

1961-04-01

Pagination or Media Count:

1.0

Abstract:

The plane-stress theory is shown to qualitatively predict the warping of plane sections observed in transient fringe patterns obtained using birefringent coatings and in dynamic photoelastic pictures obtained by other investigators. 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 how 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 accompanied by thickness mode activity which cannot be accounted for by the plane-stress theory. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE