Method and device for measuring the shearing stress of powdery and/or granular material
OwnerIvan Anton Slavko Zdravko Peschlinventor
Life of this patent
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Abstract
Method of measuring shearing stress of powdery and/or granular material using a pair of cylindrical cavities filled with the material. The cavities are turned one relative the other about a common center line with the shear stress required to turn the cavities being measured.
Claims9
Method for measuring the shearing stress of powdery and/or granular material with a pair of members displaceable relative to each other about a common intersection therebetween, the members being of circular cross-section with equal diameters and enclosing hollow cavities therebetween, the cavities having a common center line, said method comprising the steps of:
- A. filling the cavities completely with a sample of the material,
- B. placing a freely movable weight on the material in the members,
- C. turning the completely filled members with respect to each other about the center line of the cavities by rotating the weight to shear the material at the intersection between the members, and
- D. measuring the force required to shear the material.
Dependencies are inferred from the claim text.