Brookfield PFT Powder Flow Tester Operating Instructions Manual page 65

Normal Stress:
Overconsolidation:
Rathole Diameter:
Shear Stress:
Steady State Flow:
Time Consolidated Test:
Torsional Distance:
Unconfined Failure Strength:
Wall Cohesion:
Wall Friction Test:
AMETEK Brookfield
The stress due to the Axial Load. It is stress applied perpendicular
(normal) to the powder bed.
After Consolidation, reducing the Normal Stress without shearing so that
the Bulk Density is high relative to the new Normal Stress.
Minimum outlet diameter of a Core Flow hopper needed to ensure that
the powder will flow instead of forming a stable Rathole.
The stress due to the Torsional Load. It is the stress between parallel
layers of powder (Flow Function and Time Consolidated Flow Function
tests) or between a layer of powder and the lid (Wall Friction test).
Continuous powder flow where the Normal and Shear Stresses have
reached a constant level.
Compacts the powder at a given Consolidated Level for an extended
period of time (hours, overnight to represent static storage in a hopper).
Distance that the trough has rotated from its starting position at the
beginning of the test.
The stress required to cause a powder to flow at a stress free surface,
after it has been compacted to a given Consolidation Level.
A measure of the potential for the powder to stick to a wall surface. This
depends on the Consolidation Level.
The distance the powder travels across the wall surface before the Failure
Locus is measured.
Page 65 Manual No. M09-1200-F1016