Analysis of the Dynamics of the FT4 Powder Rheometer (vol 285, pg 123, 2015)

The paper entitled “Analysis of the Dynamics of the FT4 Powder Rheometer” contains calculation errors that lead to an underestimate of deviatoric stresses by a factor of ten and average compressive stresses by a factor of approximately three. The trends remain unchanged from those shown in the paper, with compressive stress and deviatoric stress both increasing approximately linearly with blade penetration depth. Here, the corrected values of compressive and deviatoric stress are given.