structure liner history
command
Syntax
- structure liner history keyword
Primary keywords:
coupling-displacement-normal coupling-displacement-shear coupling-stress-normal coupling-stress-shear coupling-yield force force-x force-y force-z ipstress-xx ipstress-yy ipstress-xy moment moment-x moment-y moment-z resultant-mx resultant-my resultant-mxy resultant-nx resultant-ny resultant-nxy resultant-qx resultant-qy stress-intermediate stress-maximum stress-minimum stress-xx stress-xy stress-xz stress-yy stress-yz stress-zz
Sample liner responses.
If the optional
name
keyword is used, then the history can be assigned a name for later reference. If not used, then the history will be assigned a default name based on the internally assigned ID number. The element to be sampled must be identified by either component ID (component-id
i) or by position (position
v). Ifposition
v is used, then the element nearest to v is taken.For stress and stress resultant histories, the surface coordinate system of the three nodes used by the element must be defined. If it is not already defined, then it can be defined by the
structure liner recover surface
command, or by specifying thesurface-x
keyword. Bending and membrane stress resultants from adjoining elements are not averaged at the element nodes.- coupling-displacement-normal [linerhistoryblock]
displacement in the normal coupling spring at a node of the element. Normal displacement positive/negative implies separation/overlap only if the liner is on the outer surface and liner element normals point away from the body to which the liner is attached. This option uses the
node
andside
keywords.
- coupling-displacement-shear [linerhistoryblock]
displacement in the shear coupling spring at a node of the element Shear displacement is always positive. This option uses the
node
andside
keywords.
- coupling-stress-normal [linerhistoryblock]
stress in the normal coupling spring at a node of the element. Normal stress positive/negative implies tension/compression only if the liner is on the outer surface and liner element normals point away from the body to which the liner is attached. This option uses the
node
andside
keywords.
- coupling-stress-shear [linerhistoryblock]
stress in the shear coupling spring at a node of the element. Shear stress is always positive. This option uses the
node
andside
keywords.
- coupling-yield [linerhistoryblock]
yield state in the shear coupling spring at a node of the element. Value {0, 1, 2} denotes never yielded, now yielding, or yielded in the past, respectively. This option uses the
node
andside
keywords.
- force [linerhistoryblock]
nodal force magnitude. Uses the
node
keyword.
- force-x [linerhistoryblock]
nodal force (\(x\)-component, global system). Uses the
node
keyword.
- force-y [linerhistoryblock]
nodal force (\(y\)-component, global system). Uses the
node
keyword.
- force-z [linerhistoryblock]
nodal force (\(z\)-component, global system). Uses the
node
keyword.
- ipstress-xx [linerhistoryblock]
stress (\(xx\)-component, surface coordinate system) for an element with a plastic material model. Uses the
integration-point
keyword and may also use thesurface-x
keyword.
- ipstress-yy [linerhistoryblock]
stress (\(yy\)-component, surface coordinate system) for an element with a plastic material model. Uses the
integration-point
keyword and may also use thesurface-x
keyword.
- ipstress-xy [linerhistoryblock]
stress (\(xy\)-component, surface coordinate system) for an element with a plastic material model. Uses the
integration-point
keyword and may also use thesurface-x
keyword.
- moment [linerhistoryblock]
nodal moment magnitude. Uses the
node
keyword.
- moment-x [linerhistoryblock]
nodal moment (\(x\)-component, global system). Uses the
node
keyword.
- moment-y [linerhistoryblock]
nodal moment (\(y\)-component, global system). Uses the
node
keyword.
- moment-z [linerhistoryblock]
nodal moment (\(z\)-component, global system). Uses the
node
keyword.
- resultant-mx [linerhistoryblock]
stress resultant \(M_x\) (surface system) at element centroid. May use the
surface-x
keyword.
- resultant-my [linerhistoryblock]
stress resultant \(M_y\) (surface system) at element centroid. May use the
surface-x
keyword.
- resultant-mxy [linerhistoryblock]
stress resultant \(M_{xy}\) (surface system) at element centroid. May use the
surface-x
keyword.
- resultant-nx [linerhistoryblock]
stress resultant \(N_x\) (surface system) at element centroid. May use the
surface-x
keyword.
- resultant-ny [linerhistoryblock]
stress resultant \(N_y\) (surface system) at element centroid. May use the
surface-x
keyword.
- resultant-nxy [linerhistoryblock]
stress resultant \(N_{xy}\) (surface system) at element centroid. May use the
surface-x
keyword.
- resultant-qx [linerhistoryblock]
stress resultant \(Q_x\) (surface system) at element centroid. Uses the
surface-x
keyword.
- resultant-qy [linerhistoryblock]
stress resultant \(Q_y\) (surface system) at element centroid. May use the
surface-x
keyword.
- stress-intermediate [linerhistoryblock]
principal intermediate stress \((\sigma_2)\) at element centroid for an element with an elastic material model. Uses the
depth-factor
keyword, and may also use thesurface-x
keyword.
- stress-maximum [linerhistoryblock]
principal maximum stress \((\sigma_1)\) at element centroid for an element with an elastic material model. Uses the
depth-factor
keyword, and may also use thesurface-x
keyword.
- stress-minimum [linerhistoryblock]
principal minimum stress \((\sigma_3)\) at element centroid for an element with an elastic material model. Uses the
depth-factor
keyword, and may also use thesurface-x
keyword.
- stress-xx [linerhistoryblock]
stress (\(xx\)-component, global system) at element centroid for an element with an elastic material model. Uses the
depth-factor
keyword, and may also use thesurface-x
keyword.
- stress-xy [linerhistoryblock]
stress (\(xy\)-component, global system) at element centroid for an element with an elastic material model. Uses the
depth-factor
keyword, and may also use thesurface-x
keyword.
- stress-xz [linerhistoryblock]
stress (\(xz\)-component, global system) at element centroid for an element with an elastic material model. Uses the
depth-factor
keyword, and may also use thesurface-x
keyword.
- stress-yy [linerhistoryblock]
stress (\(yy\)-component, global system) at element centroid for an element with an elastic material model. Uses the
depth-factor
keyword, and may also use thesurface-x
keyword.
- stress-yz [linerhistoryblock]
stress (\(yz\)-component, global system) at element centroid for an element with an elastic material model. Uses the
depth-factor
keyword, and may also use thesurface-x
keyword.
- stress-zz [linerhistoryblock]
stress (\(zz\)-component, global system) at element centroid for an element with an elastic material model. Uses the
depth-factor
keyword, and may also use thesurface-x
keyword.
Keyword Block
The following keywords are available to control the location and other details of the history. Some keywords are only available if noted. coupling-displacement-normal
, coupling-displacement-shear
, coupling-stress-normal
, coupling-stress-shear
, coupling-yield
, force
, force-x
, force-y
, force-z
, ipstress-xx
, ipstress-xy
, ipstress-yy
, moment
, moment-x
, moment-y
, moment-z
, resultant-mx
, resultant-mxy
, resultant-my
, resultant-nx
, resultant-nxy
, resultant-ny
, resultant-qx
, resultant-qy
, stress-intermediate
, stress-maximum
, stress-minimum
, stress-xx
, stress-xy
, stress-xz
, stress-yy
, stress-yz
and stress-zz
.
- depth-factor f
the depth factor at which elastic element stresses are computed (see the
structure liner recover stress
command). If this keyword is not specified, then the depth factor is set to +1. Only available if noted.
- integration-point ind
the integration point at which stresses are sampled. The integration point locations are shown here. If this keyword is not specified, then the integration point index is set to
1
. Only available if noted.
- node ind
the node location to use when retrieving values from the element. Must be from
1
to3
. If this keyword is not specified, then the node location is set to1
. Only available if noted.
- side ind
the side of an embedded liner. Must be
1
or2
, with default value of1
.
- surface-x v
the surface-x vector whose projection onto the element plane defines the x-direction of the surface coordinate system (see the
structure liner recover surface
command). If this keyword is specified, then the surface coordinate system of the three nodes used by the element will be modified.
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