DEFORM-3D Keyword Documentation Part 3 pps

DEFBWD DEFBWD Flag OPERAND DESCRIPTION DEFAULT Flag Flag indicating if deformation profile 0 optimization is performed = 0 Deformation profile optimization is not performed = 1 Deformation profile optimization is performed DEFINITION DEFBWD specifies if profile optimization is to be performed during a deformation simulation. REMARKS If Flag =1, the profile will be optimized every time a deformation boundary condition is updated (node contact or node separation). Profile optimization should be done in the mesh generator when possible. If the profile cannot be optimized in the mesh generator, deformation profile optimization should be used. If profile optimization has been done in the mesh generator, deformation profile optimization should only be used for problems which contain multiple deforming objects. Applicable simulation types: Isothermal Deformation Non-Isothermal Deformation RELATED TOPICS Inter-object contact DEMAX DEMAX MaxStrainStep OPERAND DESCRIPTION DEFAULT MaxStrainStep Maximum strain at an element center per step 0.1 DEFINITION DEMAX limits the amount of strain that can accumulate in any individual element during one time step. A new time step will be initiated when the strain in any element reaches MaxStrainStep . REMARKS DEMAX is one of several parameters used to control the size of time steps. Other keywords which effect time step size include: DSMAX, DTMAX, VMAX, and SLDERR. A new time step will be generated when the criteria specified in any of these keywords has been satisfied. If MaxStrainStep = 0, DEMAX will not be used as a step size parameter. The time steps initiated by DEMAX will be recorded in the DEFORM database only if STPDEF is specified as "System" mode. This value is typically .01 to .03. Applicable simulation types: Isothermal Deformation Non-Isothermal Deformation RELATED TOPICS Step parameters Keywords: DSMAX, DTMAX, DVMAX, SLDERR, STPDEF DENSTY DENSTY Object, Ndata, DefDensity Element(1), Density(1) : : Element(Ndata), Density(Ndata) OPERAND DESCRIPTION DEFAULT Object Object number None Ndata Number of element/density data pairs None DefDensity Default relative density of all elements not listed in 1.0 the element/density data pairs. Element(i) Element number of ith data pair None Density(i) Relative density of ith data pair 1.0 DEFINITION DENSTY specifies the relative density of the material at each element. REMARKS DENSTY is used when a porous material with relative densities less than 1.0 is being simulated. If no value is specified for DefDensity , it is assumed to be 1.0. The flow stress of porous objects should be specified for the fully dense material. Applicable object types: Porous DIEGEO Surface Geometry Page 1 of 4 DIEGEO Object, Gtype, Npoints, Npoly Point(1), X(1), Y(1), Z(1) : : : : Point(Npoints), X(Npoints), Y(Npoints), Z(Npoints) Poly(1), Point1(1), Point2(1), Point3(1), Point4(1) : : : : : Poly(Npoly), Point1(Npoly), Point2(Npoly), Point3(Npoly), Point4(Npoly) OPERAND DESCRIPTION DEFAULT Object Object number None Gtype Geometry type None = 1 Polygon description = 2 Point description = 3 Cross section(2D XYR format) Npoints Number of points used in the geometry None Npoly Number of elements describing the geometry None Point(i) Point number of i th data point None X(i) X coordinate of i th data point None Y(i) Y coordinate of i th data point None Z(i) Z coordinate of i th data point None Poly(i) Connectivity of i th polygon None Point1(i) 1 st point of i th polygon None Point2(i) 2 nd point of i th polygon None Point3(i) 3 rd point of i th polygon None Point4(i) 4 th point of i th polygon None DEFINITION DIEGEO specifies the boundary geometry of an object. REMARKS DIEGEO boundary geometry may be used to specify a geometric profile of a rigid object or to define the object geometry for automatic mesh generation. DIEGEO information is described by a list of points and the connectivity of those points by three or four node polygons. Polygon description is selected by specifying a Gtype of 1. The order in which the polygon’s points are defined are displayed in the following figures. DIEGEO Surface Geometry Page 2 of 4 Npoints is the number of points in the list which are used in the objects definition. This is followed by a list of 1 to Npoints of X, Y, and Z coordinates for each point. Npoly is the number of polygons which make up the object’s geometry. Following the listing of points is a listing of all polygons defining the object’s surface. For three node polygons, the Point4(i) will be a repeat of Point1(i). The profile geometry must be continuous, but does not need to represent a closed boundary. For each polygon in the geometry, the data should be ordered counterclockwise. Applicable object types: Rigid, Elastic, Plastic, Elastoplastic, Porous DIEGEO Rotational Surface Geometry Page 3 of 4 DIEGEO Object, Gtype, Npoints Point(1), X(1), Y(1), Z(1) : : : : Point(Npoints), X(Npoints), Y(Npoints), Z(Npoints) OPERAND DESCRIPTION DEFAULT Object Object number None Gtype Geometry type None = 1 Polygon description = 2 Point description = 3 Cross section(2D XYR format) Npoints Number of points used in the geometry None Point(i) Point number of i th data point None X(i) X coordinate of i th data point None Y(i) Y coordinate of i th data point None Z(i) Z coordinate of i th data point None DEFINITION DIEGEO specifies the boundary geometry of an object rotated about CNTRAX. REMARKS DIEGEO boundary geometry may be used to specify a geometric profile of a rigid object. DIEGEO information is described by a list of points. For Gtype equal to 2, a point description is selected. By defining a CNTRAX which lies in the same plane as the list of Point(i), the object’s geometry is defined by rotating the cross section around CNTRAX. Npoints is the number of points in the list which are used in the objects definition. This is followed by a list of 1 to Npoints of X, Y, and Z coordinates for each point. The profile geometry must be continuous, but does not need to represent a closed curve. If the geometry is a closed curve, the data should be ordered counterclockwise. If the geometry is not a closed curve, the geometry should be ordered counterclockwise such that the rigid object interior lies to the left of the profile geometry as would be the case if the entire closed shape had been drawn. Lines of symmetry should lie on either the global X or Y axis. Applicable object types: Rigid, Elastic, Elastoplastic, Porous DIEGEO Rotational Cross Section Geometry Page 4 of 4 DIEGEO Object, Gtype, Npoints, Npoints1 Point(1), X(1), Y(1), Z(1) Point(2), X(2), Y(2), Z(2) Point(3), X(3), Y(3), R(3) : : : : Point(Npoints), X(Npoints), Y(Npoints), R(Npoints) Point(Npoints+1), X(Npoints+1), Y(Npoints+1), R(Npoints+1) Point(Npoints+2), X(Npoints+2), Y(Npoints+2), R(Npoints+2) OPERAND DESCRIPTION DEFAULT Object Object number None Gtype Geometry type None = 1 Polygon description = 2 Point description = 3 Cross section(2D XYR format) Npoints Number of points used in the geometry None Npoints1 Number of rotational center and axis 2 Point(1) Rotational center None Point(2) Rotational axis None Point(i) Point number of i th data point None X(i) X coordinate of i th data point None Y(i) Y coordinate of i th data point None R(i) Radius of i th data point None DEFINITION DIEGEO specifies the boundary geometry of an object in 2D XYR format. REMARKS DIEGEO boundary geometry may be used to specify a cross section of a object. DIEGEO information is described by a list of points. Npoints is the number of points in the list which are used in the objects definition plus 2. Npoints1 is one rotational center and one rotaional axis, it equals 2. For Gtype equal to 3, 1st line is rotational center(X,Y,Z). For Gtype equal to 3, 2nd line is rotational axis(X,Y,Z). From 3rd line, followed by a list of 1 to Npoints-2 of X, Y, and R coordinates for each point. EXAMPLE DIEGEO 1 3 9 2 1 1.0000000E-01 2.0000000E-01 3.0000000E-01 2 4.0000000E-01 5.0000000E-01 6.0000000E-01 3 2.2000000E+00 3.4628230E+00 0.0000000E+00 4 3.0000000E-01 3.4628230E+00 0.0000000E+00 5 3.6704000E-01 2.8956030E+00 0.0000000E+00 6 4.2897730E-01 2.3715000E+00 7.4999300E-01 7 9.4322000E-01 2.2528330E+00 0.0000000E+00 8 2.2000000E+00 1.9628230E+00 0.0000000E+00 9 2.2000000E+00 3.4628230E+00 0.0000000E+00 Applicable object types: Rigid, Elastic, Elastoplastic, Porous, Plastic [...]... DIFCOE 1 1 3 4 800 900 1000 0.1 0.2 0.2 0.5 0.6 0.9 0.98 0.89 Type 2 Example of Material 1 Atom (%) C1 C2 0.1 0.2 0.5 0.2 0 .3 0.6 0 .3 0.4 0.7 DIFCOE 1 2 3 3 0.1 0.2 0.5 0.2 0 .3 0.6 0 .3 0.4 0.7 REMARKS For Type 1: A is atom content and T is temperature For Type 2: C1(T) and C2(T) are coefficients as a function of temperature and A is the atom content which is extracted from the element data For Type 3: C1(A)... both DSMAX and DTMAX are two of several parameters used to control the size of time steps Other keywords which effect time step size include: DEMAX, DVMAX, and SLDERR A new time step will be generated when the criteria specified in any of these keywords has been satisfied Reference sections 6 .3. 2 and 6 .3. 2.1 Typically, the value of MaxStrokeStep should correspond to an average strain increment of about... (=C1(T)exp((C2(T)*A)) NONE =3 exponential function (=C1(A)exp((C2(A)/T)) NONE N1 Number of temperature for matrix N2 Number of carbon content (atom) for matrix Npt number of temperature/atom points NONE Ndim dimension of array (can not be changed) 3 DEFINITION DIFCOE specifies the diffusion coefficient for carburization of the material EXAMPLES The format for the DIFCOE keyword file is shown for specific... but values cannot be assigned to both DTMAX and DSMAX are two of several parameters used to control the size of time steps Other keywords which effect time step size include: DEMAX, DVMAX, and SLDERR A new time step will be generated when the criteria specified in any of these keywords has been satisfied Typically, the value of MaxTimeStep should correspond to an average strain increment of about 0.01,... maximum temperature increment per time step in heat transfer calculation The time step calculated by DTPMAX will control the time step for deformation when STPDEF = 3 REMARKS If DTPMAX = 0.0 then this option is ignored If DTPMAX  0.0 and STPDEF  3 then DTPMAX controls when a solution will substep If the temperature change over a time step  t is greater than MaxTempInc, the simulation will substep The... in any object reaches MaxObjVolStep REMARKS DVMAX is one of several parameters used to control the size of time steps Other keywords which effect time step size include: DSMAX, DTMAX, DEMAX, and SLDERR A new time step will be generated when the criteria specified in any of these keywords has been satisfied The MaxElemVolStep represents the maximum allowable volume change for each object (dVe/Ve), and... DRMESH is the nodal displacement since the creation of current mesh REMARKS This state variable is used to detemine the quality of current mesh It is initialized to zero for a new mesh The format of this keyword is very similar to DRZ DRZ DRZ Object, Ndata, DefXDisp, DefYDisp, DefZDisp Node(1), XDisp(1), YDisp(1 , : : Node(Ndata), XDisp(Ndata), YDisp(Ndata) OPERAND Object Ndata DefXDisp DefYDisp DefZDisp... the secondary stage of the process For example, hydraulic press with a dwell Applicable simulation types: Isothermal Deformation Non-Isothermal Deformation Heat Transfer RELATED TOPICS Step parameters Keywords: DSMAX, DEMAX, DVMAX, SLDERR, STPDEF DTPMAX DTPMAX MaxTempInc, t_min, t_max OPERAND DESCRIPTION DEFAULT MaxTempInc Maximum increment in temperature per step 0 t_min Minimum time step allowed for... occur based on a simple calculation A time step size is calculated for each surface node by, where L is the distance that a given node moves in a time step, dplen is the scaling constant specified by the keyword, u is the total velocity of the node and tmin is the time step calculated This value is computed for each node and the minimum value is compared to the time step size of the current step If the... will continue to substep until the original time step  t has been reached The substeps ( tDTPMAX) are bounded by the minimum time step value tmin and the time step  t, or If DTPMAX  0.0 and STPDEF = 3 (Temperature) then the time steps will be defined solely through temperature changes in the objects The first time step ( t) will be defined by DSMAX/DTMAX Thereafter, each subsequent time step will . 2.8956 030 E+00 0.0000000E+00 6 4.2897 730 E-01 2 .37 15000E+00 7.499 930 0E-01 7 9. 432 2000E-01 2.252 833 0E+00 0.0000000E+00 8 2.2000000E+00 1.9628 230 E+00 0.0000000E+00 9 2.2000000E+00 3. 4628 230 E+00. 1 3 9 2 1 1.0000000E-01 2.0000000E-01 3. 0000000E-01 2 4.0000000E-01 5.0000000E-01 6.0000000E-01 3 2.2000000E+00 3. 4628 230 E+00 0.0000000E+00 4 3. 0000000E-01 3. 4628 230 E+00 0.0000000E+00 5 3. 6704000E-01. 1 1 3 4 800 900 1000 0.1 0.2 0.2 0.5 0.6 0.9 0.98 0.89 Type 2 Example of Material 1 Atom (%) C1 C2 0.1 0.2 0.5 0.2 0 .3 0.6 0 .3 0.4 0.7 DIFCOE 1 2 3 3 0.1 0.2 0.5 0.2 0 .3 0.6 0 .3 0.4