Dynamic Stress-Strain Measurements By High Speed Streak Photography

Lippe D. Sadwin

doi:10.1117/12.969242

7 June 1989 Dynamic Stress-Strain Measurements By High Speed Streak Photography

Lippe D. Sadwin

Author Affiliations +

Proceedings Volume 1032, 18th Intl Congress on High Speed Photography and Photonics; (1989) https://doi.org/10.1117/12.969242
Event: 18th International Congress on High Speed Photography and Photonics, 1988, Xi'an, Shaanxi, China

Abstract

Detonating explosives were used to induce high intensity stress waves in geologic materials. The method of loading the sample materials involved emplacing a cylindrical explosive charge in contact with one end of the specimen. To observe the wave propagation phenomena, the slit of a high speed streak camera was aligned with the axis of the explosive and geologic sample. A series of gridlines painted on the surface of the specimens enabled clear observation of stress wave propagation and subsequent material motion. The decay of peak stress along the axis of the loaded sample and the ability to simultaneously determine the volumetric strain levels provided a unique method of obtaining a complete dynamic stress-strain curve on each experiment. The experimental data were taken on 5 rock types having a wide range of mechanical properties. The observed stress wave intensities were in the range from 1 to 50 kilobars. The strain amplitudes were from 0.6 to 25 percent. The characteristic impedance of the rocks studied varied between 2.2 and 11.4 megarayls. The detonation impedances of the explosives used were 7.7 and 13.3 megarayls. In some cases, the observed wave travelled slower than the statically determined elastic wave speed, indicating plastic wave propagation. The information provided by this high speed photographic method is useful in understanding the initial material behavior of the dynamic stress wave propagation induced in rock media from detonating explosives.

Citation Download Citation

Lippe D. Sadwin "Dynamic Stress-Strain Measurements By High Speed Streak Photography", Proc. SPIE 1032, 18th Intl Congress on High Speed Photography and Photonics, (7 June 1989); https://doi.org/10.1117/12.969242

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
16 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Explosives

Streak cameras

Wave propagation

High speed photography

Particles

Photography

Photonics

Show All Keywords

Keywords/Phrases

Search In:

Publication Years