Beam
- class itasca.structure.Beam
Objects of this type should not be created (instantiated) directly in Python. Use the module functions that return instances of this type.
- area() Float.
Get the cross-section area of the element.
- component_id() int.
Get the Beam component id.
- connectivity(component: int) bool.
Get the index of the node with component-ID id in the element. A ValueError exception is raised if no node in that element matches.
- delete() None.
Delete this structural element.
- density() float.
Get the density of this structural element.
- extra(slot: int) any.
Get the Beam extra data in the given slot.
- force() (vec3, vec3).
Get the force at each end of the beam in the element local system.
- force_nodal() (vec3, vec3, vec3, vec3).
Get the generalized nodal force acting at each end in the global system. The end 1 translational and rotational components are given first.
- group([slot: str or int]) str.
Get the Beam group name in a given slot.
- group_remove(group_name: str or int[, slot: str or int]) bool.
Remove from the given group from all group slots of the Beam. One argument of type string, giving the group name, is required. The return value is a bool which is True if the group was removed from any slot, otherwise False.
- groups() {slot: group_name}.
Get a dictionary describing which groups this Beam is part of. The keys of the dictionary are the slot names and the values are the group names.
- id() int.
Get the Beam structural element id.
- in_group(group_name: str or int[, slot: str or int]) bool.
Test if the Beam is part of a given group. If the optional argument slot is given, only that slot is searched. Otherwise, all group slots are searched.
- length() float.
Get the length of the beam element.
- load() vec3.
Get the uniform applied distributed load acting on the beam element in the local y- and z-directions. The x-component of the return value will always be 0.0.
- local_system() Tens3.
Get local coordinate system of this element as a 3x3 tensor.
- mark() bool.
Get the mark flag on the structural element. The structural element logic may modify this flag during command processing and cycling.
- moi() vec3.
Get the moment of inertia of the beam. This is defined as the moment of inertia with respect to the x-, y-, and z-axes.
- moment() (vec3, vec3).
Get the moment at each end of the beam in the element local system.
- moment_plastic() float.
Get the plastic moment capacity in the beam.
- moment_plastic_y() float.
Get the plastic moment capacity in Y in the beam.
- moment_plastic_z() float.
Get the plastic moment capacity in Z in the beam.
- nodes() tuple of Structural element node objects.
Get a tuple containing the structural element nodes attached to this elemment.
- poisson() float.
Get the Poisson’s ratio of the beam element.
- pos() vec3.
Get the position vector of the element, defined as the element centroid.
- set_area(float) None.
Set the cross-section area of the element.
- set_density(float) None.
Set the density of this structural element.
- set_extra(slot: int, value: any) None.
Set the Beam extra data in the given slot.
- set_group(group_name: str or int[, slot: str or int]) None.
Set the Beam group name in a given slot.
- set_load(vec3) None.
Set the uniform applied distributed load acting on the beam element in the local y- and z-directions. The x-component is ignored on assignment.
- set_mark(bool) None.
Set the mark flag on the structural element. The structural element logic may modify this flag during command processing and cycling.
- set_moi(vec3) None.
Set the moment of inertia of the beam. This is defined as the moment of inertia with respect to the x-, y-, and z-axes.
- set_moment_plastic(float) None.
Set the plastic moment capacity in the beam.
- set_moment_plastic_y(float) None.
Set the plastic moment capacity in Y in the beam.
- set_moment_plastic_z(float) None.
Set the plastic moment capacity in Z in the beam.
- set_poisson(float) None.
Set the Poisson’s ratio of the beam element.
- set_thermal_expansion(float) None.
Set the thermal-expansion coefficient for the structural element.
- set_young(float) None.
Set the Youngs modulus of the beam element.
- thermal_expansion() float.
Get the thermal-expansion coefficient for the structural element.
- valid() bool.
Returns True if this Beam is live.
- volume() None.
Get the beam element volume, equal to the cross-sectional area times the length.
- ydir() vec3.
Get the y-axis of the beam element local system.
- young() float.
Get the Youngs modulus of the beam element.
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