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Principal Stresses in Compacted Cohesive Powders

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consolidation stress
σ
0
20.
Warren-Spring equation parameters:
curvature index n
1.9
cohesion C
4.
tensile strength T
1.5
axes maxima:
normal stress axis max.
50.
shear stress axis max.
30.
This Demonstration applies the Warren–Spring equation to calculate the unconfined yield stress, major consolidation stress, and effective angle of internal friction of a cohesive powder's compact. The input parameters are the initial consolidation (normal) stress, the yield loci curve's curvature parameter, the compact's cohesion, and its tensile strength. The principal stresses are calculated by finding two tangential Mohr semicircles, one corresponding to the consolidation condition and the other to the strength of the free surface.
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