DEFORM-3D Keyword Documentation Part 11 docx

REFPOS REFPOS Object, Method, Var1, Var2, Var3 OPERAND DESCRIPTION DEFAULT Object Object number None Method Distance tolerance for critical nodes None 0 = None, 1 = coordinate , 2 = node

PROBID

PROBID

Problem-id

Problem-id Sets the Problem ID during the processing of keywords None

Ndata Number of node/traction data pairs None

DefPressureX Default value of distributed nodal traction in X

direction of all nodes not listed in the node/traction pairs with deformation boundary constraint code 2

DefPressureY Default value of distributed nodal traction in X

direction of all nodes not listed in the node/traction pairs with deformation boundary constraint code 2

DefPressureZ Default value of distributed nodal traction in X

direction of all nodes not listed in the node/traction pairs with deformation boundary constraint code 2

Node(i) Node number of ith data pair None

Temp(i) Nodal traction of ith data pair 0.0

DEFINITION

PRZ maintains a specified normal pressure or shear traction across the face of the elements lying

between the selected boundary nodes.

REMARKS

Pressure is defined as force per unit area The pressure is assumed to be linear between adjacent nodes

as shown in Figure 6.9 on page 6-68.

The pressure constraint will be applied to the element faces lying between the selected boundary nodes.

The pressure direction may be specified as normal or shear Positive normal pressure applies tension

to the element faces Positive shear traction is defined by the right hand rule.

If no value is specified for DefPressureX, DefPressureY, or DefPressureZ, it is assumed to be zero.

Nodal pressure values may only be applied to nodes which have deformation boundary constraint code

2 (BCCDEF).

Nodal pressure may be specified as a function of time with keyword BCCFCN.

REFPOS

REFPOS Object, Method, Var1, Var2, Var3

OPERAND DESCRIPTION DEFAULT

Object Object number None

Method Distance tolerance for critical nodes None

(0 = None, 1 = coordinate , 2 = node)

Var1 X coordinate or Node number None

Var2 Y coordinate or Blank None

Var3 Z coordinate or Blank None

REFTMP

REFTMP Object, RefTmp

OPERAND DESCRIPTION DEFAULT

Object Object number None

RefTemp Reference temperature of the object 20  C or 68  F

DEFINITION

REFTMP specifies the reference temperature at which the geometry of the object

is defined

REMARKS

The object reference temperature is used to calculate the material thermal

expansion for elastic and elastoplastic objects

Applicable object types: Elastic, Elastoplastic

RGDCNT

RGDCNT Object1, Object2, Method, MstRefNd, SlvRefNd, DistTol

OPERAND DESCRIPTION DEFAULT

Object1 Object number of first object None

Object2 Object number of second object None

Method Contact calculation method 0

= 0: None

= 1 - 4: Distance between reference points less than the tolerance

(1: Total distance; 2: X distance; 3: Y distance; 4: Z distance)

= 5: Automatic detection without reference points (not implemented)

MstRefNd Reference point for the Master object (geometry node #)

SlvRefNd Reference point for the Slave object (geometry node #)

DistTol Distance tolerance

OPERAND DESCRIPTION DEFAULT

Object Object number NONE

Ndata Number of node/flux pairs None

DefFlux Default distributed nodal current flux of all nodes not 0.0

listed in the node/flux pairs with resistance heating

boundary constraint code 3

Node(i) Node number of ith data pair None

Flux(i) Distributed nodal current flux of ith data pair 0.0

RMDPTH Object, RDepth

OPERAND DESCRIPTION DEFAULT

Object Object number None

RDepth Interference depth at which to initiate automatic 0.0

There are four keywords that control the initiation of a remeshing procedure

(RMDPTH, RMTIME, RMSTEP, RMSTRK) for an object When the remeshing criteria of any of these keywords has been fulfilled or the mesh becomes unusable (negative Jacobian), the object will be remeshed

RMDPTH controls the initiation of a remeshing procedure based on the depth of interference between a slave object and a master object The depth of

interference is the depth an element edge of the slave object is crossing the

surface of a master object

The object to be remeshed must be a slave object

If RDepth = 0, the interference depth will not be used to determine when the

object is remeshed

Applicable object types: Plastic, Porous

RMSTEP

RMSTEP Object, RStep

OPERAND DESCRIPTION DEFAULT

Object Object number None

RStep Simulation step increment at which to initiate an 0

automatic remeshing procedure

DEFINITION

RMSTEP controls the initiation of a remeshing procedure based on the number of simulation steps measured from the last remeshing

REMARKS

There are four keywords that control the initiation of a remeshing procedure

(RMDPTH, RMTIME, RMSTEP, RMSTRK) for an object When the remeshing criteria of any of these keywords has been fulfilled or the mesh becomes unusable (negative Jacobian), the object will be remeshed

RStep is the value of simulation steps allowed to elapse between remeshings of the object

If RStep = 0, the number of steps between remeshings will not be used to

determine when the object is remeshed

Applicable object types: Plastic, Porous

RMSTRK

RMSTRK Object, RStroke

OPERAND DESCRIPTION DEFAULT

Object Object number None

RStroke Stroke increment of primary object at which to 0

initiate an automatic remeshing procedure

DEFINITION

RMSTRK controls the initiation of a remeshing procedure based on the stroke of the primary object

REMARKS

There are four keywords that control the initiation of a remeshing procedure

(RMDPTH, RMTIME, RMSTEP, RMSTRK) for an object When the remeshing criteria of any of these keywords has been fulfilled or the mesh becomes unusable (negative Jacobian), the object will be remeshed

RStroke is the stroke increment of the primary object measured from the most recent remeshing

If RStroke = 0, the stroke of the primary object will not be used to determine when the object is remeshed

Applicable object types: Plastic, Porous

RMTIME

RMTIME Object, RTime

OPERAND DESCRIPTION DEFAULT

Object Object number None

RTime Process time increment at which to initiate an automatic 0.0

There are four keywords that control the initiation of a remeshing procedure

(RMDPTH, RMTIME, RMSTEP, RMSTRK) for an object When the remeshing criteria of any of these keywords has been fulfilled or the mesh becomes unusable (negative Jacobian), the object will be remeshed

RTime is the value of process time allowed to elapses between remeshings of an object

If RTime = 0, the elapsed process time between remeshings will not be used to determine when the object is remeshed

Applicable object types: Plastic, Porous

ROTSYM

ROTSYM Object Angle

VectorX VectorY VectorZ

PointX PointY PointZ

Angle Angle of rotational symmetry 0 (degrees)

PointX X coordinate on rotational axis None

PointY Y coordinate on rotational axis None

PointZ Z coordinate on rotational axis None

DEFINITION

ROTSYM specifies the conditions for a rotational symmetry condition Rotational symmetry is a

boundary condition in which symmetry is a special case It is a matching of the velocity on one surface of

a body to another surface on the same body

REMARKS

It is recommended that if users use this, that the mesh on the two sides have identical looking meshes

If not, a fine mesh is recommended

Applicable object types: Plastic, Porous, Elastic and Elastoplastic

RZ

RZ Object

Node #, X, Y, Z

OPERAND DESCRIPTION DEFAULT

Object Object number None

Node # Node number None

Node numbers should begin with 1 and proceed continuously to the last node

To ensure the most efficient processing of the simulation, the mesh should be optimized for profile If this has not been done in the mesh generator, it can be done in DEFORM using keywords DEFBWD and TMPBWD

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

SEPRES Object1, Object2, DefType, Pressure (DefType = 3)

OPERAND DESCRIPTION DEFAULT

DefType Type of separation criterion 1

= 1 system default value

= 2 percentage of flow stress

= 3 absolute pressure

FracStress Percentage of flow stress 0.0

Pressure Absolute pressure for nodal separation 0.0

DEFINITION

The SEPRES specifies the minimum separation criterion for nodes under

pressure Contacting nodes between the objects specified will be allowed to

separate provided that they meet the set parameters

REMARKS

The two objects for which the separation criterion is to be applied to are set through the Object1 and Object2 values Next, the type of separation criterion is set through DefType

Setting DefType to 1 or system default values will cause normal separation when the contacting node experiences a tensile force or pressure

A DefType of 2 will cause nodal separation when the pressure on the node is greater than a given percentage of flow stress (FracStress)

Setting DefType to 3 will cause nodal separation when the pressure experienced

by the node is greater than the variable Pressure

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

SIMNAM

SIMNAM

Simulation_name

OPERAND DESCRIPTION DEFAULT

Simulation_name name of simulation None

SLDERR

SLDERR SlideError

OPERAND DESCRIPTION DEFAULT

SlideError Maximum normal distance an interface slave node 0.0

may move from the master object surface per step

of this normal is referred to as the normal distance error, an absolute distance SLDERR causes a new time step to be generated whenever a slave node's

normal distance error exceeds SlideError

The value of SlideError should be between 1% -10% of the smallest side length of the smallest element

If SlideError = 0, the distance error will not be used as a time step parameter The time steps initiated by SLDERR will be recorded in the DEFORM database only if STPDEF is specified as "System" mode

Applicable simulation types: Isothermal Deformation Non-Isothermal Deformation

RELATED TOPICS

Inter-object contact, Step Parameters

Keywords: STPDEF

SMAX

SMAX MaxStroke

OPERAND DESCRIPTION DEFAULT

MaxStroke Maximum stroke of the primary object 0.0

DEFINITION

SMAX terminates a simulation when the stroke of the primary object reaches MaxStroke

REMARKS

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

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

keywords has been met, the simulation will terminate

If MaxStroke = 0, SMAX will not be used as a termination condition

Applicable simulation types: Isothermal Deformation

SMODE

SMODE SimMode

OPERAND DESCRIPTION DEFAULT

SimMode Simulation mode 3

= 1 Isothermal Deformation

= 2 Heat Transfer

= 3 Non-Isothermal Deformation

DEFINITION

SMODE specifies the type of simulation to be performed (Note: SMODE is nearly

obsolete Please use TRANS instead.)

REMARKS

There are three types of FEM analysis that can be performed in DEFORM Isothermal deformation simulates the deformation of objects with no heat exchange Heat transfer simulates heat exchange within and between objects Non-isothermal deformation

simulates the combined effects of deformation and heat exchange

SOLMTD

SOLMTD Solver

Solver Type of solver to use in heat transfer simulations 1

= 1 Sparse matrix

= 2 Conjugate gradient solver

= 3 Skyline solver DEFINITION

SOLMTD specifies the type of linear equation solver to be used in heat transfer simulations

REMARKS

The skyline solver uses the skyline storage method in conjunction with Gaussian elimination

The sparse solver is optimized for sparse matrix problems.

The conjugate gradient solver is recommended when a part is well contacted due to its speed and efficient use of system memory.

Applicable simulation types: Isothermal Deformation

Non-Isothermal Deformation

SOLMTT

SOLMTT Solver

OPERAND DESCRIPTION DEFAULT

Solver Type of solver to use in heat transfer simulations 1

The skyline solver is recommended for most problems

Applicable simulation types: Heat Transfer

Non-Isothermal Deformation

OPERAND DESCRIPTION DEFAULT

Object Object Number None

NData No of Data Pairs None

Force(i) Force of ith data set None

Speed(i) Speed of ith data set None

AcclCoef Acceleration coefficient 0

DwellTime Dwell time after maxium load is reached 0

DEFINITION

SPDLMT This keyword is to incorporate the press limit into the simulation The keyword

is represented by a Force-Speed curve that is used as an upper bound of the die speed with the given die force

Acclcoef specifies the acceleration coefficient of the die It is zero by default, meaning

that the press will never increase speed

DwellTime specifies the dwell time after the maximum load is reached The simulation is

load-controled during dwell, when workpiece may deform due to creep

STNCMP

STNCMP Object, Ndata, FieldWidth, DefSTNCMP

Element(1), STNCMP(1)(1), , STNCMP(1)(FieldWihth)

: :

Element(Ndata), STNCMP(Ndata)(1), , STNCMP(1)(FieldWihth)

OPERAND DESCRIPTION DEFAULT

Object Object number None

Ndata Number of element/STNCMP pairs None

DefSTNCMP Default elemental STNCMP of all elements not listed 0.0

in the element/STNCMP pairs

FieldWihth Field width of strain components stored (determined by STNOUT) 6

Element(i) Element number of ith data pair None

STNCMP(i)(j) Elemental STNCMP of ith data pair 0.0

Transformation plasticity, Thermal, Transformation volumetric, and Total

Elemental strain components are interpolated between meshes during remeshing

procedures

Applicable object types: Plastic, Elastoplastic, Porous

STNOUT

STNOUT PlasticOn, ElasticOn, CreepOn, TransOn, TotalOn, ThmVolOn, TrnsfVolOn

OPERAND DESCRIPTION DEFAULT

PlasticOn Plastic strain flag 1

ElasticOn Elastic strain flag 0

CreepOn Creep strain flag 0

TransOn Transformation plasticity strain flag 0

TotalOn Total strain flag 0

ThmVolOn Thermal volumetric strain flag 0

TrnsfVolOn Transformation volumetric strain flag 0

(=0: Not stored, =1: Stored)

DEFINITION

STNOUT specifies strain component storage flags

REMARKS

Strain may consist of several components: Plastic, Elastic, Creep, Transformation

plasticity, Thermal, and Transformation volumetric These components can be stored separately in Database Keyword STNOUT specifies which ones of them are stored Notice this keyword will affect the field width of strain component (STNCMP) Plastic, elastic, creep, trans plasticity and total strain each have six components Thermal and transformation volumertic each has one component

Thus, for example, if plastic and thermal strain is turned on, the field width of STNCMP will be 6+1=7

STPDEF

STPDEF StepType

OPERAND DESCRIPTION DEFAULT

StepType The type of step saved to the database 1

= 1 User

= 2 System

= 3 Temperature DEFINITION

STPDEF specifies which types of step solutions will be saved to the

DEFORM™ database

REMARKS

If StepType is specified as "User", only step solutions based on DTMAX or

DSMAX will be recorded in the database

If StepType is specified as "System", solutions of all the step types (DSMAX, DTMAX, DVMAX, DEMAX, SLDERR, and nodal contact) will be recorded in the database The specified step types will be recorded at STPINC multiples

If Step Type is specified as "Temperature", step solutions will then be driven by change in temperature only and not by time or stroke The keyword DTPMAX sets the criterion governing how a time step definition will behave

Applicable simulation types: Isothermal Deformation

Non-Isothermal Deformation

RELATED TOPICS

Step parameters, DEFORM database

Keywords: DTMAX, DSMAX, DEMAX, DVMAX, SLDERR, STPINC, DTPMAX