A Study of the Feasibility of Constructing a High Pressure (4kBAR) Multiaxial Material Test Device.
Final rept. 15 Sep 85-14 Sep 86,
ATKINSON-NOLAND & ASSOCIATES INC BOULDER CO
Pagination or Media Count:
A study was conducted into the feasibility of constructing a fluid cushion, multiaxial loading device for testing concrete or other materials to high pressures. The requirements for the devices are 1 three independently controlled stress axes, 2 maximum pressures in each axis to 4 kBar, 3 load application through fluid cushions to minimize undesireable boundary effects, and 4 cubical specimen sizes of 4 inches 10 cm or greater. A number of possible design concepts were developed and critiqued. Of these two appear to hold promise for eventual design and construction. The most promising concept requires use of a preexisting conventional testing machine of at least 2 million lbs 8.9 MN capacity. The second concept would be feasible for facilities not having a large loading machine. Both proposed concepts depend on the successful development of a bladderseal fluid cushion patterned after that of Michelis but having a larger size and increased pressure capacity. Means to measure specimen displacement following the approach of Michelis would also need to be developed.
- Hydraulic and Pneumatic Equipment
- Test Facilities, Equipment and Methods