zone list command

Syntax

zone list <keyword> <range>

Primary keywords:

density    extra    fluid-density    gridpoint    group    hysteretic    information    join    mechanical    pore-pressure    principal    principal-effective    profile    property    state    strain    strain-increment    strain-rate    stress    stress-effective    summary    tetrahedra

List zone data. If no keyword is given, the default output of the command is that associated with the information keyword.

density

Zone mass density.

extra i

Extra zone variable for extra array index i.

fluid-density

Zone fluid density (only available if model configure fluid has been specified).

gridpoint

ID number of gridpoint associated with zones.

group <slot s >

Zone group assignments. Only groups in slot s will be shown if the slot keyword is used.

hysteretic

Lists the hysteretic damping assignments, and parameter values, for each zone (only available if model configure dynamic has been specified; see Hysteretic Damping for details).

information

general zone information: the zone type (brick, wedge, etc), the constitutive model assigned, density, volume, and centroid.

join

Zone face (join) connections

mechanical

General information about zone mechanical calculations. Large strain setting, nodal mixed discretization setting, damping settings, location of maximum local force ratio, and others.

pore-pressure

Zone pore pressure (average from gridpoint values)

principal

Total principal stress components for zones.

principal-effective

Effective principal stress comonents for zones.

profile keyword

List the values of a zone field variable on points spaced equally over a line.

The available zone field variables are summarized here:

acceleration [zonelistblock]

acceleration magnitude at the gridpoint(only available in if model configure dynamic has been specified)

acceleration-x [zonelistblock]

x-acceleration at the gridpoint (only available in if model configure dynamic has been specified)

acceleration-y [zonelistblock]

y-acceleration at the gridpoint (only available in if model configure dynamic has been specified)

acceleration-z [zonelistblock]

z-acceleration at the gridpoint (only available in if model configure dynamic has been specified)

condition [zonelistblock]

a measure of how badly deformed a zone is (see Condition Measure of Zones).

density [zonelistblock]

The density of the zone.

displacement [zonelistblock]

displacement magnitude at the gridpoint

displacement-x [zonelistblock]

x-displacement at the gridpoint

displacement-y [zonelistblock]

y-displacement at the gridpoint

displacement-z [zonelistblock]

z-displacement at the gridpoint

extra [zonelistblock]

extra variable value. The extra variable index used will default to 1 and can be changed with the index modifier keyword. The value will by default come from the grid point extra variables, but this can be specified using the source modifier keyword. The value will by default be treated as a scalar floating point type, but this can be specified using the type modifier keyword.

factor-of-safety [zonelistblock]

The largest factor of safety that remains stable for this grid point. Only available after a model factor-of-safety calculation. The velocity-limit keyword is used to specify a velocity magnitude over which the grid point is considered unstable at a given factor of safety.

pore-pressure [zonelistblock]

pore pressure in zone. By default this will be the grid point pore pressure, but the zone average pressure can be specified by using the source keyword modifier.

property [zonelistblock]

a property of the mechanical constitutive model of the zone. The property name must be specified using the name keyword modifier. By default it will be assumed the property is a floating point scalar, but this can be specified using the type modifier keyword.

property-fluid [zonelistblock]

a property of the fluid constitutive model of the zone. The property name must be specified using the name keyword modifier. By default it will be assumed the property is a floating point scalar, but this can be specified using the type modifier keyword.

property-thermal [zonelistblock]

a property of the thermal constitutive model of the zone. The property name must be specified using the name keyword modifier. By default it will be assumed the property is a floating point scalar, but this can be specified using the type modifier keyword.

ratio-local [zonelistblock]

the local unbalanced force ratio at each gridpoint. Like all results, this can be changed to the logarithm of the value by using the :lkwd:’log’ keyword modifier.

saturation [zonelistblock]

the saturation at the gridpoint (only available in if model configure fluid has been specified)

strain-increment [zonelistblock]

the strain increment tensor of the zone, determined by the current displacement field. Use the quantity keyword to specify which scalar value to retrieve from the tensor.

strain-rate [zonelistblock]

the strain rate tensor of the zone, determined by the current velocity field. Use the quantity keyword to specify which scalar value to retrieve from the tensor.

stress [zonelistblock]

the stress tensor of the zone, determined by the weighted average of the subzone stresses. Use the quantity keyword to specify which scalar value to retrieve from the tensor.

stress-effective [zonelistblock]

the effective stress tensor of the zone, determined by the weighted average of the subzone stresses minus the zone averaged pore pressure. Use the quantity keyword to specify which scalar value to retrieve from the tensor.

stress-strength-ratio [zonelistblock]

the ratio of the current stress to a failure surface of the zone, as determined by the current zone constitutive model. Not all constitutive models support this calculation. If unsupported, the value returned will be 10. The value returned is generally held to a maximum of 10.

temperature [zonelistblock]

the temperature at the gridpoints. The source modifier keyword can be used to specify that zone based temperature should be used instead.

timestep-dynamic [zonelistblock]

the local critical dynamic time step of that particular gridpoint. (only available in if model configure dynamic has been specified)

unbalanced-force [zonelistblock]

the unbalanced force magnitude at the gridpoint.

unbalanced-force-x [zonelistblock]

x-unbalanced force at the gridpoint.

unbalanced-force-y [zonelistblock]

y-unbalanced force at the gridpoint

unbalanced-force-z [zonelistblock]

z-unbalanced force at the gridpoint

velocity [zonelistblock]

the velocity magnitude at the gridpoint

velocity-x [zonelistblock]

x-velocity at the gridpoint

velocity-y [zonelistblock]

y-velocity at the gridpoint

velocity-z [zonelistblock]

z-velocity at the gridpoint

property keyword ...
Material properties assigned to zones. Property names for each constitutive model are listed with the model definitions (see the model definitions in the Constitutive Models section).
state <keyword>

Plasticity state indicators. The default keyword is any.

any

Lists the union of all plasticity state flags in any tetrahedral subzone (default).

average

Prints plasticity state if more than 50% of tetrahedral subzones are at this state.

strain

lists shear strain rate, shear strain incrmement, volumetric strain rate and volumetric strain increment. Strain rates are basec on the current velocity field, and strain increments are based on the current displacement field.

strain-increment

the strain increment tensor, based on the current displacement field.

strain-rate

the strain rate tensor, based on the current velocity field.

stress

components of total stress for zones.

stress-effective

components of effective stress for zones.

summary

summary of zone module status.

tetrahedra

List values at each tetrahedral subzone of the zone.

gridpoint

The four gridpoints associated with each subzone.

information

The volume and centroid location of each subzone.

principal

The current principal stresses of each subzone, including directions.

principal-effective

The current principal effective stresses of each subzone, including directions.

stress

The current stress tensor in each subzone.

stress-effective

The current effective stress tensor in each subzone.


zone list Keyword Block

The following modifiers are available to specify addition information for the zone list profile keywords. It is required that the location of the profile be specified using the keywords begin, end, and segments. The following keywords are available. acceleration, acceleration-x, acceleration-y, acceleration-z, condition, density, displacement, displacement-x, displacement-y, displacement-z, extra, factor-of-safety, pore-pressure, property, property-fluid, property-thermal, ratio-local, saturation, strain-increment, strain-rate, stress, stress-effective, stress-strength-ratio, temperature, timestep-dynamic, unbalanced-force, unbalanced-force-x, unbalanced-force-y, unbalanced-force-z, velocity, velocity-x, velocity-y and velocity-z.

begin v

Specifies the beginning point of the profile line.

component keyword

This keyword selects which scalar to retrieve from a vector type value, such as velocity or displacement. If the value type is not vector, this setting is ignored. The available options are:

x

x-component of the vector

y

y-component of the vector

z

z-component of the vector

magnitude

vector magnitude

end v

Specifies the ending point of the profile line.

index i

For keywords that require it (most notably extra), this specifies the index that should be used. The default value will be 1.

gravity b

If on, then gravitational forces are included in the returned applied force. The default is off.

gridpointid i

Specifies the location of the history by the location of the gridpoint with ID number i.

log b

If on, the returned number is the base 10 log of the absolute value of the original value. The default is off.

method

This specifies the method of calculation used to bring zone-based quantities to arbitrary locations in space (including at gridpoint positions).

constant

Assumes values are constant inside zones. This is the default option. Values at gridpoints or at zone boundaries will pick one adjacent zone to use.

average

This uses an volume weighted average of all the zones connected to the gridpoint.

inverse-distance-weight

This uses an weighted average of up to 32 zones in the immediate vicinity of the point. The weighting is determined by a power of the distance of the zone centroid from the specified point.

power f

Specifies the power of the distance used to weight values. The default power is 3.0.

radius-ratio f

Specifies the ratio of the maximum distance from the point of the zones selected, to the ratio used to calculate weighted values. Zones farther from this value are discounted. The default value is 0.75.

polynomial <tolerance f >

Uses a fit to a polynomial function based on the zones in the vicinity of the point. Degenerate degrees of freedom are detected and removed. The optional tolerance flag can be used to change the value used to detect a degenerancy. The default value is 1e-7.

name s

Certain keywords (most notably property) require a name value to be fully specified. This will determine the specific property name retrieved.

null

Specifies the criteria used to ignore zone values. By default mechanical null zones are ignored.

fluid b

Zones with a null fluid constitutive model are also ignored if this is set to on.

mechanical b

Zones with a null mechanical constitutive model are ignored if this is set to on (this is the default).

thermal b

Zones with a null thermal constitutive model are ignored if this is set to on.

position v

Specifies the location of the history at v. This location must be inside a zone.

quantity keyword

This keyword selects which scalar to retrieve from a symmetric tensor type value, such as stress or strain. If the value type is not a tensor, this setting is ignored. The available options are:

intermediate

intermediate principal stress

maximum

the maximum (most positive) value of principal stress. Note that in FLAC3D compressive stresses are negative.

mean

The mean pressure value, defined as the trace of the tensor divided by 3. For stresses this is most often referred to as the pressure.

minimum

The minimum (most negative) principal stress. Note that in FLAC3D compressive stresses are negative.

norm

The norm of the strain rate; see the equation in Zone Field Data Names

octahedral

octahedral stress; see the equation in Zone Field Data Names

shear-maximum

maximum shear stress

total-measure

distance of tensor value to the origin in principal space

volumetric

volumetric change, or trace

von-mises

Von Mises measure; see the equation in Zone Field Data Names

xx

xx-component of the tensor

xy

xy-component of the tensor

xz

xz-component of the tensor

yy

yy-component of the tensor

yz

yz-component of the tensor

zz

zz-component of the tensor

segments i

Specifies the number of points to distribute evenly along the profile line from begin to end.

source keyword

Certain keywords (like extra and pore-pressure) can be retrieved either from the zone structure or from the gridpoint structure. The default value is gridpoint.

gridpoint

Values are retrieved directly from the gridpoint.

zone

Values are retrieved from the zone.

stress b

A few of the tensor type quantity options do different things depending if the value is considered a stress. When coming from a value like extra, this cannot be determined automatically. This allows the user to specify that the incoming tensor value should be considered a stress quantity.

type keyword

In certain cases the type (scalar, vector, or tensor) of the value cannot necessarily be determined ahead of time. Extra variables, for example, can hold values of all three types. This keyword allows one to specify which type it is assumed to be. If the original value type does not match, 0.0 is returned.

scalar

A scalar float type. This is the default.

vector

A vector type.

tensor

A tensor type.

velocity-limit f

Specifies the velocity limit used to determine if an object is stable or not for the factor-of-safety value. The default value is 1e-4.

zoneid i

Specifies the location of the history is at the centroid of zone with ID i.