The Experimental Study On The Stress Relaxation Of Fresh Herbage Materials In The Process Of The Compression

In order to promoting the development of compression theory and compression rheology for agricultural fibrous materials, exploiting and utilizing fresh herbage product, the stress relaxation process of typical fresh Alfalfa, Sorghum Sudanese and Corn stalk has been tested and studied on the 9KG-350 high density baler according to the rheologic characteristic of fresh herbage materials in the process of the compression. Through analyzing experimental data by computer, rheologic equations of stress relaxation and other compression parameters are obtained in different die charge. Based on the findings of the study, the paper analyzes the relationship that material varieties and die charge influence the maximum pressure , compressed density, stress relaxation rate and physical characteristic of herbage production. The experimental results have shown the power of the baler and production property are optimum when Alfalfa , Sorghum Sudanese and Corn stalk are compressed in respective die charge : 4kg, 8kg, 11kg. All these results are significant to optimum design of compression engineering and development herbage industry.