Abstract
Results of resonant column tests on 23 specimens of bulk wheat, showing effects of strain amplitude, confining stress, wheat type (hard and soft red winter wheat), wheat density, and moisture content on wheat damping capacity are presented, along with models relating damping capacity to shear strain amplitude and to corresponding shear stiffness. Damping capacity is a primary property of bulk wheat needed to compute the seismic response of metal bins filled with wheat. Test results are presented to validate the use of staged testing procedures. Staged testing is desirable because it allows measurement of damping versus strain and damping versus shear modulus relationships for several different stress levels using a single specimen.
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