当前位置:文档之家› LS-DYNA 2D金属切削模拟步骤

LS-DYNA 2D金属切削模拟步骤

在ANSYS Launcher界面中,选择ANSYS Mechanical/LS-DYNA1、菜单过滤Main Menu→Preprocessor→LD-DYNA Explicit→OK2、设置文件名及分析标题Utility Menu→File→change Jobname→2D cutting→New log and error file :YES→OKUtility Menu→File→change Title→cutting analysis →OK3、选择单元类型Main menu→preprocessor→Element Type→Add/Edit/Delete→Add→2D solid 162→OK→options→选择const.stress ;Lagrangian→OK4、定义材料模型(1)定义刀具材料模型Main menu→preprocessor→Material Props→Material Models→rigid material→输入:DENS:5.2e3 ;EX:4.1e11 ;NUXY:0.3 ;选择“Y and Zdisps” ;“All rota tions”→OK(2)定义工件Johnson-cook材料模型Main menu→preprocessor→Material Props→Material Models→Gruneisen→Johnson-cook→输入:DENS:7.8e3 ;EX:2.06e11 ;NUXY:0.3A:507;B:320;C:0.28;n;0.064;m=1.06D1:0.15;D2:0.72;D3:1.66;D4:0.005;D5:--0.84yangmeng112010-8-30 17:43:435、创建几何模型(1)创建工件模型Main menu→preprocessor→Create→Areas→Rectangle→By Dimensions→输入:X1,X2:0,5;Y1,Y2:0,3→OK(2)创建刀片模型Main menu→preprocessor→Create→Keypionts→In Active CS→依次输入:keypoint number:5,X、Y、Z :5.1,2.9,0;keypoint number:6,X、Y、Z :6,3.228,0;keypoint number:7,X、Y、Z :6,4,0;keypoint number:8,X、Y、Z :5.294,4,0→OKyangmeng112010-8-30 17:44:006、网格划分(一)(1)对刀片进行网格划分Utility Menu→Select→Entities→Lines :By Num/Pick→Apply→选取刀片边线→OKMain menu→preprocessor→Meshing→Size contrls→Manualsize→Lines→All lines→NDIV:10→OK(2)对刀尖半圆进行网格划分Utility Menu→Select→Entities→Lines :By Num/Pick→Apply→选取刀尖半圆→OKMain menu→preprocessor→Meshing→Size contrls→Manualsize→Lines→All lines→NDIV:3→OK(3)确定刀片的单元属性Main menu→preprocessor→Meshing→Mesh Attributes→Picked Aeras→选取刀片→Apply→确定材料号和单元类型号为1→OK(4)刀片网格划分Main menu→preprocessor→Meshing→MeshTool→Mesh:Aeras;shape:Tri;free→Mesh→选取刀片→OK(二)(5)对工件进行网格划分切分工件Utility menu →Workplane→Wp settings→Grid and Triad→Minimum ,maximum:-5,5 ; Spacing:1.0→OK平移和旋转工作平面并用其切分工件Utility menu →Workplane→Offset wp by increm ens→X,Y,Z offsets:0,2.5,0;XY,YZ,ZX angle:0,90,0→OKMain menu→preprocessor→Modeling→operate→Booleans→Divide→Areas by wkplane→选取工件→OK取消工作平面显示Utility menu→workplane→Display workingplane→等分接触区域相关Y向线段Utility Menu→Select→Entities→Lines :By Num/Pick→Apply→选取工件接触区Y向线段(两条)→OKMain menu→preprocessor→Meshing→Size contrls→Manualsize→Lines→All lines→NDIV:10→OK等分接触区域相关X向线段Utility Menu→Select→Entities→Lines :By Num/Pick→Apply→选取工件接触区X向线段(两条)→OKMain menu→preprocessor→Meshing→Size contrls→Manualsize→Lines→All lines→NDIV:40→OK等分接触区域不相关Y向线段Utility Menu→Select→Entities→Lines :By Num/Pick→Apply→选取工件接触区Y向线段(两条)→OKMain menu→preprocessor→Meshing→Size contrls→Manualsize→Lines→All lines→NDIV:25→OK等分接触区域不相关X向线段Utility Menu→Select→Entities→Lines :By Num/Pick→Apply→选取工件接触区X向线段(底边)→OKMain menu→preprocessor→Meshing→Size contrls→Manualsize→Lines→All lines→NDIV:30→OK确定工件的单元属性Main menu→preprocessor→Meshing→Mesh Attributes→Picked Aeras→选取工件→Apply→确定材料号为2和单元类型号为1→OK工件网格划分Main menu→preprocessor→Meshing→MeshTool→Mesh:Aeras;shape:Quad;mapped→Mesh →选取工件→OKyangmeng112010-8-30 17:44:227、建立partMain menu→preprocessor→LS-DYNA options→part options→create all part→OK(part1:刀具;part2:工件)Plot→parts(不同颜色显示单元)8、定义接触信息Main menu→preprocessor→LS-DYNA options→contact→Define contact→surface to surf;Eroding;静、动摩擦系数为0.15、0.10→OK→弹出contact options对话框,确定接触件(工件),目标件(刀片)→OK9、施加边界条件Utility menu→select→Entities→Nodes :By Location :X Coordinates→Min,Max:-0.01,0.01;From Full→Apply(选中左侧边所有节点)Main menu→preprocessor→LS-DYNA options→Constraints→Apply→on nodes→pick All→All DOF→OKUtility menu→select→Entities→Nodes :By Location :Y Coordinates→Min,Max:-0.01,0.01;From Full→Apply(选中底边所有节点)Main menu→preprocessor→LS-DYNA options→Constraints→Apply→on nodes→pick All→All DOF→OK恢复整个模型的选择Utility menu→select→Everything10、对刀片施加初速度Main menu→preprocessor→LS-DYNA options→Initial Velocity→on parts→w/Nodal Rotate→选择part1,VX:-100→OK恢复整个模型的选择Utility menu→select→Everything11、设置能量控制选项Main menu→Solution→Analysis options→Energy options→打开所有能量控制选项→OK12、设置人工体积粘性选项Main menu→Solution→Analysis options→Bulks viscosity→Quadratic Viscosity Coefficient:1.0→OK13、设置时间步长因子Main menu→Solution→Time controls→Time step ctrls→Time step scale factor:0.6→OK14、设置求解时间Main menu→Solution→Time controls→Solution time→1e-3→OK15、设置结果文件输出步数Main menu→Solution→Output Controls→File output Freq→Number of steps→[EDRST]:50;[EDHTIME]:50→OK16、设置结果文件的输出类型Main menu→Solution→Output Controls→Output File Types→Add:ANSYS and LS-DYNA→OK 17、输出K文件Main menu→Solution→Write jobname.K18、求解Main menu→Solution→Solve19、后处理(暂时不管)。

相关主题