Determination of elastic parameters of grain with oedometric and acoustic methods

Abstract

Values of modulus of elasticity E and Poisson’s ratio ν were determined with two methods adopted from geotechnique. First approach used was a method proposed by SAWICKI (1994). This type of examination was applied to estimate values of E and v for wheat and rapeseed beddings for five levels of moisture content ranging from 6% to 20%. Modulus of elasticity E of wheat was found to decrease with an increase in moisture content. With the second method values of E were determined based on measurement of shear wave velocity. Tests were performed for bedding of wheat and rapeseed under equilibrium moisture content. Values of modulus of elasticity were found to depend of hydrostatic pressure and were higher then those determined in uniaxial compression test.