THE EFFECT OF PRESHOCK LOADING ON THE RESPONSE OF NTS TUFF

Award Information
Agency:
Department of Defense
Amount:
$50,000.00
Program:
SBIR
Contract:
N/A
Solitcitation Year:
N/A
Solicitation Number:
N/A
Branch:
Defense Threat Reduction Agency
Award Year:
1987
Phase:
Phase I
Agency Tracking Number:
6564
Solicitation Topic Code:
N/A
Small Business Information
Terra Tek Inc
400 Wakara Wy, Salt Lake City, UT, 84108
Hubzone Owned:
N
Woman Owned:
N
Socially and Economically Disadvantaged:
N
Duns:
N/A
Principal Investigator
 BENNIE G DIBONA
 (801) 584-2405
Business Contact
Phone: () -
Research Institution
N/A
Abstract
PRESHOCKED PRECONDITIONING OF TUFF MAY OCCUR IN TWO MANNERS AT THE NEVADA TEST SITE. FIRST, THE MATERIAL IS "PRESHOCKED" IN A LINEOF-SIGHT TYPE UNDERGROUND NUCLEAR TEST BY THE FIRST WAVE PASSAGE. THE SECOND MANNER MAY OCCUR AS A RESULT OF AREAL SPACE LIMITATIONS WHEN A SECOND EVENT IS SITED WITHIN A REGION OF PRESHOCKED MATERIAL. UNDER CERTAIN LOAD-UNLOADED CONDITIONS THE MATERIAL STRENGTH MAY BE VERY MUCH REDUCED FOR SUBSEQUENT LOADING. A LARGE LOSS OF STRENGTH DUE TO PRESHOCKING COULD SIGNIFICANTLY INFLUENCE THE EFFECTIVENESS OF STEMMING AND CONTAINMENT. A TEST PROGRAM IS PROPOSED ON PROVIDE FOR A BETTER UNDERSTANDING OF THE EFFECT OF PRELOADING (LOAD AND UNLOAD) ON THE MICROMECHANICS OF MATERIAL LOADING AND THE SUBSEQUENT MATERIAL RESPONSE.

* information listed above is at the time of submission.

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