An improved apparatus for measuring the tensile strength of powders

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Abstract
In the present apparatus the powder sample is consolidated into a shallow, cylindrical cell which is split diametrically. One half of the cell is fixed and the other is attached to a calibrated spring system by means of which a horizontal load is applied. From the load, the force per unit area required to split the powder mass can be obtained with a reproducibility generally to better than 0.5%. In addition, the cell dimensions are known, thus enabling the bulk density of the sample to be accurately determined. The type of result obtained is indicated. When the apparatus is used in conjunction with the Jenike flow-factor tester the shear stress for zero normal compressive stress (`cohesion' of material) can be estimated by interpolation rather than, as previously. by extrapolation.

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