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A Thousand-ton Capacity Stiff Testing Machine.

Authors
Horino-FG; Brady-BT; Duvall-WI; Hooker-VE
Source
NTIS: PB 209 538 :19 pages
Link
NIOSHTIC No.
10008864
Abstract
This report presents the theory and design of a stiff loading machine used by the Bureau of Mines. The machine incorporates three high-strength steel columns as the restraining member in parallel with the specimen. The theory presented gives the basis of design and the dimensions of component parts of the machine. Laboratory verification of the theoretical stiffness is described using three different setups involving a hydraulic jack and spacers and confirms the stiffness calculations to within 1 percent. Experimental techniques, testing procedures, and special equipment designed for determining the complete stress-strain behavior of nx cores of both hard and soft rock are described. Typical test data are presented as force-displacement curves for two rock types, a marble and a granite.
Publication Date
19720101
Document Type
IH; Report of Investigation;
Fiscal Year
1972
NTIS Accession No.
PB-209538
NTIS Price
A03
Identifying No.
RI 7624
Source Name
NTIS: PB 209 538
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