土壤直角切削的有限元仿真  

Study on Viscous Soil Rectangular Cutting FEM Simulation

作　　者：周明[1] 张国忠[1] 许绮川[1] 夏俊芳[1] 

机构地区：[1]华中农业大学工程技术学院,武汉430070

出　　处：《华中农业大学学报》2009年第4期491-494,共4页Journal of Huazhong Agricultural University

基　　金：农业部农业科技跨越计划项目(2007-18);湖北省科技攻关计划项目(2004AA101D07);华中农业大学科技创新基金资助项目(52204-06076)资助

摘　　要：为减少耕作阻力,优化耕整机具结构与性能,基于ANSYS/L-SDYNA利用修正的Drucker-Prager塑性模型、用Lagrange和ALE相结合的方法,以粘性土壤为对象开展了直线刃口刀具对其直角切削的有限元数值模拟,得到了土壤的滑移破坏变形状况、刀具应力分布和切削阻力变化。同时对该土壤开展了室内土槽试验,研究显示有限元仿真结果与试验结果基本一致。In order to reduce the cultivation resistance and optimized the structure and the quality of the tillage tools, the orthogonal cutting process finite clement numerical simulation in viscous soil was developed on the basis of the modified Drucker-Prager plastic model by using ANSYS/LS-DYNA and a combination of Lagrange and ALE. By using this computer simulation,the slipping failure strain condition of the viscrus soil,the cutting tool stress distribution and the changes of the cutting resistance were obtained. Meanwhile,an indoor soil bin test was carried out on the viscous soil, the result of which was the same as that of the computer simulation.

关 键 词：土壤切削 耕作阻力 仿真 

分 类 号：TG702[金属学及工艺—刀具与模具]