Analysis of internal fraction property of corn stalk powder under triaxial compression test

Corn stalk powder was densified to investigate its internal fraction property using triaxial apparatus in this paper, with the experimental method of quadric regressive orthogonal and central composite design, factors of water content, loading speed and bulk density (which is acquired by changing sample weight due to same volume) were selected to test internal friction coefficient. The mathematic model acquired is help to optimize processing technology as well as predict the corn stalk powder product quality.