Study on shear and compression characteristics of silage sugarcane tail stem
The study was to improve the crushing quality of silage sugarcane tail stem crushing machinery,study the shear and compression characteristics of silage sugarcane tail stem.In this study,Guitang 42,which was widely cultivated in Guangxi,was used as the research object to shear and compress the tail stems of silage sugarcane by WDW-T100 universal testing machine.Based on the central combination design test(CCD),the effects of loading speed,moisture content and sampling position on the shear strength of silage sugarcane tail stems were studied.Based on the single factor test,the effects of compression velocity,presence or absence of stem nodes and compression direction on compression characteristics were studied.The results showed that the shear strength of the silage sugarcane tail stem was 0.66-0.95 MPa,and the shearing process could be divided into three stages,and the maximum shear force appeared in the first stage.The Design-Expert 12.0 software analysis determined that the moisture content and sampling position had significant effects on the shear strength(P＜0.05),but the loading speed had no significant effect on the shear strength(P＞0.05).The maximum compressive force decreased with increasing loading speed.The maximum compressive force of the part with stem joints was greater than that of the part without stem joints.The axial maximum compressive force was greater than the transverse maximum compressive force.The study indicates that the study can provide a reference for the design and optimization of silage sugarcane tail stem crushing machinery and equipment.
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