DEFORM-3D Keyword Documentation Part 8 doc

MGERR MGERR Object, MaxDistance, MaxAngle OPERAND DESCRIPTION DEFAULT Object Object number None Distance Distance tolerance for critical nodes 0.01 Angle Angle tolerance for critical nod

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=1 function of time

Itype Type of interface heat transfer coefficient

=0 Inactive (use global definitions such as inter-object data)

The keyword defines the heat exchange information such as temperature,

convection coefficient, and the radiation view factor for a specific boundary

If the data is of constant type, only the constant value is given in the data list If tabular data is used to describe any of the above variables, the number of data sets is listed followed by the data set The following example shows how

environmental temperature, emmisivity and heat flux are constant and the

convection coefficient is a function of temperature Note the use of comments on the keyword describing the contents

LOCTMP 1 1 0 0 2 0 0 % The keyword defintion

68 % The environmental temperature

2 % Number of data sets in convection coefficient

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68 0.004 % First data set in the convection coefficient

220 0.006 % Second data set in the convection coefficient

.7 % Emmisivity

10 % Heat flux

When Itye is non-zero, the interface heat transfer coefficient is included in the local boundary condition The value has higher priority than the interface heat transfer coefficient defined in inter-object data (IHTCOF)

Applicable Simulation Modules: Thermal

Applicable Simulation Modes: Heat Transfer

Applicable Object Types: ALL except rigid

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LMAX

LMAX XmaxLoad, YmaxLoad

OPERAND DESCRIPTION DEFAULT

XmaxLoad Maximum load of primary object in X direction 0.0

YmaxLoad Maximum load of primary object in Y direction 0.0

DEFINITION

LMAX terminates a simulation when the load of the primary object reaches either XmaxLoad or YmaxLoad

REMARKS

LMAX is one of several parameters used to control the termination of the

simulation Other keywords which effect simulation termination include: EMAX, NSTEP, SMAX, TMAX, VMIN When the criteria specified in any of these

keywords has been met, the simulation will terminate

Generally, LMAX is used when the movement control of the primary object is velocity specified

If XmaxLoad = 0 or YmaxLoad = 0, the parameter will not be used as a

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Termination parameters, Primary object

Keywords: SMAX, TMAX, EMAX, NSTEP, VMIN

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LMTSTR

LMTSTR Object, LimitSrate

Object Object number None

LimitSrate Limiting strain rate None

of steps only, then reset

If LimitSrate is too small, the solution may have difficulty converging If it is too large the accuracy of the solution will be degraded

The value of LimitSrate is updated by DEFORM during the simulation when there

is a significant change in the strain rate

Applicable object types: Plastic, Porous

RELATED TOPICS

Deformation iteration

Keywords: AVGSTR

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LOCATM

LOCATM Object, Iwin, UsrRtn, Etype, Rtype, Atype

Followed by Data

Iwin Heat exchange window index None

UsrRtn User routine No None

Etype Type of environmental atom content definition None

=3 function of time and atom

Atype Type of atom flux

=0 constant

=1 function of time

DEFINITION

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LOCATM specifies the local diffusion boundary definiton for an object The keyword is used to specify the local diffusion boundary condition

environmental atom content and atom flux are constant and the reaction rate coefficient is a function of time Note the use of comments on the keyword

describing the contents

LOCATM 1 1 0 0 1 0 % The keyword defintion

0.12 % The environmental atom constant

2 % Number of data in the reaction rate coefficient

1 1.00 % First data set in the reaction rate coefficient

2 1.20 % Second data set in the reaction rate coefficient

0.001 % Atom flux

Applicable Simulation Modules: Diffusion

Applicable Simulation Modes: Heat Transfer

Applicable Object Types: ALL except rigid

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MATAXI

MATAXI Object, Ndata, FieldWidth

Element(1), MATAXI(1)(1), , MATAXI(1)(FieldWidth)

: :

Element(Ndata), MATAXI(Ndata)(1), , MATAXI(Ndata)(FieldWidth)

Ndata Number of element/MATAXI pairs None

FieldWidth Number of variables for each element =1 for 2D; = 9 for 3D None

Element(i) Element number of ith data pair None

MATAXI(i)(j) jth component of material axis data for the ith data pair (see below) DEFINITION

MATAXI specifies the material axis at each element In 2D, it has one

component, which is the angle In 3D, it has nine components, which are the vectors for material axis x, y, and z, in the global coordinate system By default, they are (1,0,0), (0,1,0), and (0,0,1), respectively

REMARKS

These state variables are computed only when the material is anisotropic

Related keyword: ANISO

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MATDEN

MATDEN Material, Density

Material Material number None

Density Density None

DEFINITION

MATDEN specifies the density for a material

REMARKS

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MDSOBJ

MDSOBJ RefObj1 RefObj2 Method Distance

RefObj1 Reference Object 1 None

RefObj2 Reference Object 2 None

Method Method to calculate distance 0

(0 = Total distance, 1 = X distance, 2 = Y distance)

Distance Distance used to stop the simulation None

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MESHNO

MESHNO MeshNum

MeshNum Current mesh number 1

DEFINITION

MESHNO indicates the cumulative number of object remeshings which have taken place at a specified step number

REMARKS

For initial runs MeshNum = 1

The mesh number increases by one for each remeshing of an object

The mesh number value is updated automatically by DEFORM and should not be modified

For example, suppose a database contains step numbers -1, 5, 10, 15, -16, 20,

25, -25, 30, 35 and that remeshings occurred at steps -16 and -25 If step number

35 was read into the Input Preparation utility, the mesh number would be set to

"3"

Applicable simulation types: Isothermal Deformation

Non-Isothermal Deformation

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MGERR

MGERR Object, MaxDistance, MaxAngle

Distance Distance tolerance for critical nodes 0.01

Angle Angle tolerance for critical nodes 31.5

Automatic mesh generation, Automatic remeshing

Keywords: MGGRID, MGNELM, MGTELM, MGSIZR, MGWCUV, MGWTMP, MGWSTN, MGWSTR

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MGGRID

MGGRID Object, XDivision, YDivision

XDivision Number of grid divisions in X 25

YDivision Number of grid divisions in Y 25

Keywords: MGERR, MGNELM, MGTELM, MGSIZR, MGWCUV, MGWTMP, MGWSTN, MGWSTR

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MGNELM

MGNELM Object, NumSurfElem, NumBodyElem, NumCrcSctElem, PreferredMthd

Object Object number None

NumSurfElem Number of surface elements in new mesh 2000

NumBodyElem Number of body elements in new mesh (not currently used) 8000

NumCrcSctElem Number of cross section elements in new mesh (for brick remeshing) 100 PreferredMthd Preferred meshing method 0

=0: Unstructured tetrahedra

=1: Brick (refer to WPAXIS definition)

=2: (obsolete, It will be kept to maintain compatibility with previous versions and will be treated

as 1 in mesh generator.)

DEFINITION

MGNELM specifies the preferred method and approximate number of elements to be

generated when an object is being meshed using AMG

REMARKS

MGNELM is one of several keywords used to control the mesh density during automatic

remeshing

For Brick remeshing, at least one workpiece axis (WPAXIS) needs to be defined This

provides center axis for revolving or direction for extruding

The error between the number of specified elements and the number of generated elements

is typically on the order of ten percent

When the mesh is generated, the specified total number of elements is used in conjunction with the "Point" and "Parameter" controls to determine the mesh density

Applicable object types: Rigid, Elastic, Plastic, Elastoplastic, Porous

RELATED TOPICS

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Keywords: MGGRID, MGERR, MGTELM, MGSIZR, MGWCUV, MGWTMP, MGWSTN, MGWSTR, WPAXIS

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MGSIZM

MGSIZM Object, MaxSize

DEFINITION

MGSIZM controls the size of the largest element in the object’s mesh.

REMARKS

MGSIZM is one of several keywords used to control the mesh density during AMG mesh generation.

RELATED TOPICS

Keywords: MGGRID, MGERR, MGNELM, MGSIZM, MGSIZR, MGWCUV, MGWTMP,

MGWSTN, MGWSTR

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MGSIZR

MGSIZR Object, SizeRatio

Object Object Number None

SizeRatio Size ratio of largest to the smallest element 2.0

DEFINITION

MGSIZR controls the ration of the largest to the smallest element size in areas which are being assigned additional elements based on weighted parameters REMARKS

MGSIZR is one of several keywords used to control the mesh density during AMG mesh generation

If equal sized elements are desired, then SizeRatio = 1

If SizeRatio = 0, the element size ratio will not be a factor in the mesh density distribution

RELATED TOPICS

Keywords: MGGRID, MGERR, MGNELM, MGSIZR, MGWCUV, MGWTMP, MGWSTN, MGWSTR

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MGTELM

MGTELM Object, ElemThick

ElemThick Number of elements through the geometric thickness 4

The thickness direction of an object is perpendicular to the geometry center which

is defined by the medial axis

The total number of elements to be generated in a mesh is controlled by the value

of NumElem in keyword MGNELM If the value of ElemThick results in a mesh that contains more than NumElem elements, the value of ElemThick will be scaled down so that the mesh contains approximately NumElem elements If the value of ElemThick results in a mesh that contains fewer than NumElem elements, the remaining elements will be distributed to other user specified mesh density

controls (curvature, strain, strain rate, and temperature)

RELATED TOPICS

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Keywords: MGGRID, MGERR, MGNELM, MGSIZR, MGWCUV, MGWTMP, MGWSTN, MGWSTR

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MGUSER

MGUSER Object, WinNo, Density, VelocityX, VelocityY, VelocityZ, WindowType, SpdTyp

If WindowType = 1, parallelipiped defined by 8 corners

Point(1), X(1), Y(1), Z(1)

: : :

Point(8), X(8), Y(8), Z(8)

If WindowTyp = 2: Cylinder

OriginA_X, OriginA_Y, OriginA_Z

OriginB_X, OriginB_Y, OriginB_Z

inner radius, outer radius

Object Object Number None

WinNo Index of user defined mesh window (1 to N) None

Density Mesh Density of ith point in defined area 0.0

VelocityX X component of window velocity 0.0

VelocityY Y component of window velocity 0.0

VelocityZ Zcomponent of window velocity 0.0

WindowTyp shape type of the window: =1: box; =2: cylinder 1

SpdTyp Speed type: =0 or 1: constant; =2: f(time); = -n: following object n 0

Point(i) Index of ith points describing area (1 to Ndata) None

X(i),Y(i),Z(i) coordinate of ith point in defined area 0.0

inner radius, outer radius inner and outer radii of cylinder 0.0

DEFINITION

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MGUSER specifies an area in space which will move with and object during deformation

This area has a mesh density definition applied to it and will cause the area to be meshed

with an appropriate mesh density Density

REMARKS

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MGWCUV

MGWCUV Object, WtCurve

WtCurve Weight associated with boundary curvature when None

generating a mesh with AMG

DEFINITION

MGWCUV specifies the element density weight to be associated with the

boundary curvature when an object is being meshed using AMG

REMARKS

MGWCUV is one of several keywords used to control the mesh density during AMG mesh generation The values from all the mesh density keywords are

combined during the mesh generation process to create a mesh density

distribution within the geometric boundary

The keywords MGWCUV, MGWSTN, MGWSTR, MGWTMP, and MGWUSR specify relative mesh density weights to be assigned to the associated keyword parameter (curvature, strain, strain rate, temperature, and user defined area)

If WtCurve > 0, the mesh density will be allocated so that areas with the greatest boundary curvature receive a higher mesh density than areas with lower

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MGWSTN

MGWSTN Object, WtStrain

WtStrain Weight associated with the elemental strain gradient 0.0

when generating a mesh using AMG

DEFINITION

MGWSTN specifies the element density weight to be associated with the

elemental strain values when an object is being meshed using AMG

REMARKS

MGWSTN is one of several keywords used to control the mesh density during AMG mesh generation The values from all the mesh density keywords are

The keywords MGWCUV, MGWSTN, MGWSTR, MGWTMP, and MGWUSR specify relative mesh density weights to be assigned to the associated keyword parameter (curvature, strain, strain rate, temperature, and user defined area) When an object is deformed, strain is recorded at the element center When a remeshing is performed, the value of WtStrain specifies the emphasis to be

placed on the elemental strain interpolation error as a parameter for determining mesh density during a remeshing

If WtStrain > 0, the mesh density will be allocated so that areas with the greatest strain gradient will receive a higher mesh density than areas with a lower strain gradient

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If WtCurve < 0, elemental strain will not be used to determine the mesh density Applicable object types: Rigid, Elastic, Plastic, Elastoplastic, Porous

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MGWSTR

MGWSTR Object, WtStrain

WtStrain Weight associated with the elemental strain rate 0.0

when generating a mesh using AMG

DEFINITION

MGWSTR specifies the element density weight to be associated with the

elemental strain rate values when an object is being meshed using AMG

REMARKS

MGWSTR is one of several keywords used to control the mesh density during AMG mesh generation The values from all the mesh density keywords are

The keywords MGWCUV, MGWSTN, MGWSTR, MGWTMP, and MGWUSR specify relative mesh density weights to be assigned to the associated keyword parameter (curvature, strain, strain rate, temperature, and user defined area) When an object is deformed, strain rate is recorded at the element center When a remeshing is performed, the value of WtSrate specifies the emphasis to be placed

on the elemental strain rate interpolation error as a parameter for determining mesh density during a remeshing

If WtSrate > 0, the mesh density will be allocated so that areas with the greatest strain rate gradients will receive a higher mesh density than areas with lower strain rate gradients

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