沙柳和香菇菌渣混配成型过程中的力链演变  

Evolution on force chain in mixing and forming process of Salix and mushroom residue

作　　者：李震[1] 赵召才 陶鑫 岳强 Li Zhen;Zhao Zhaocai;Tao Xin;Yue Qiang(School of Mechanical Engineering,Inner Mongolia University of Science and Technology,Baotou O14010,China)

机构地区：[1]内蒙古科技大学机械工程学院,内蒙古包头014010

出　　处：《锻压技术》2024年第4期161-168,共8页Forging & Stamping Technology

基　　金：国家自然科学基金资助项目(52366018);内蒙古自治区鄂尔多斯科技局项目(YF20232302)。

摘　　要：为了分析沙柳和香菇菌渣混配成型过程中的力链演变过程,在实际压缩试验的基础上,建立沙柳颗粒和混配料颗粒的离散元仿真模型。结果表明:沙柳颗粒和混配料颗粒在压缩过程中,轴向各层颗粒的最大平均压缩力差值分别为17.21和6.61 N,轴向上的强力链分布均经历了先由下向上再由上向下的传递过程。在压缩完成时刻,沙柳颗粒成型块内强接触分布从上至下逐渐减小,强接触占比为34.52%;混配料颗粒成型块内强接触分布均匀,强接触占比为36.14%;沙柳颗粒成型块和混配料颗成型块的轴向各层颗粒最大孔隙率差值分别为14.1%和6.36%。研究表明,沙柳和香菇菌渣混配成型改善了成型块内压力的传递,增加了颗粒与颗粒之间的接触面积,提高了成型块的强度和稳定性。In order to analyze the evolution process of force chain in the mixing and forming process for Salix and mushroom residue,a discrete element simulation model of Salix particles and mixed ingredient particles was established on the basis of actual compression test.The results show that during the compression process of Salix particles and mixed ingredient particles,the maximum average compressive force difference values of particles on each layer in the axial direction are 17.21 and 6.61 N,respectively.And the distribution of strength force chain in the axial direction experiences the transfer process from bottom to top and then from top to bottom.At the time of compression completion,the strong contact distribution in the formed block of Salix particles gradually decreases from top to bottom,the proportion of strong contact is 34.52%,while the strong contact distribution in the formed block of mixed ingredients particles is uniform,the proportion of strong contact is 36.14%.The maximum difference values of particles on each layer in the axial direction for the Salix particle formed block and the mixed ingredient particle formed block are 14.1%and 6.36%,respectively.The research shows that the mixing and forming of Salix and mushroom residue improves the pressure transfer in the formed block,increases the contact area between particles,and improves the strength and stability of the formed block.

关 键 词：沙柳颗粒 香菇菌渣颗粒 混配料 力链 孔隙率 

分 类 号：TK6[动力工程及工程热物理—生物能]