An experimental study on the uniaxial compressive deformation of corn stacks in different granular configura-tions
Corn kernels are inclined to become broken and classified when being stacked for storage purpose,resulting in dif-ferential settlement in the stacks.In view of the effect of morphological difference of broken corn kernels on stack's compressive deformation,this study sets corn stacks made of complete,semi-complete,and powdered corn kernels as research objects and performs a uniaxial compression test on them in order to determine the compressive deformation of those three corn stacks un-der 200kPa vertical pressure.The results indicate as the load grows,the corn stack's compressive deformation worsens.Under a constant load,the strain of corn stack rises over the time.In the process of compression,corn stack has witnessed growing den-sity but decreasing porosity.The bulk modulus rises when the load grows and decreases when it remains unchanged.The corn stack made of complete kernels has shown higher bulk modulus.The model in which Hooke spring is serial connected to Max-well unit and Kelvin unit can better predict the compressive deformation of corn stacks.The research findings here may provide theoretical support for studies on compressive deformation of grain stacks in the warehouse.
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维普
