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*END ASSEMBLYAssembly-level node set set1 contains all the nodes from node sets set1 belonging to part instances PartA-1 and PartA-2. *END PARTA node set with the same name is defined at the assembly level as follows: *ASSEMBLY, NAME=Assembly-1 The following input defines a node set, set1, that belongs to part PartA and will be inherited by every instance of PartA: *PART, NAME=PartA Once nodes are assigned to a node set, additional nodes can be added to the same node set however, nodes cannot be removed from a node set. Therefore, it is sometimes better to specify that a node set be stored in unsorted order. It is important to ensure that the nodes are combined in the desired way. For example, if you define multi-point constraints ( “General multi-point constraints, ” Section 35.2.2) between two node sets, a constraint will be created between the first node in Set 1 and the first node in Set 2, then between the second node in Set 1 and the second node in Set 2, etc. You may choose to create an unsorted node set as described later, which is often useful for features that match two or more node sets. The same name can be used for a node set and for an element set.īy default, the nodes within a node set will be arranged in ascending order, and duplicate nodes will be removed. Node set names can be up to 80 characters long. In either case each node set is assigned a name. Nodes can be grouped into node sets when they are created or after they have already been defined. An individual node can belong to several node sets. The members of a node set can be individual nodes or other node sets. Node sets are the fundamental references of the model and should be used to assist the input definition. Node sets are used as convenient cross-references when defining loads, constraints, properties, etc. If a nodal coordinate system is in effect and you specify a local coordinate system for a particular node or node set definition, the input coordinates are first transformed according to the local system specified in the node definition and then according to the nodal coordinate system. In addition to defining nodal coordinate systems, you can define individual nodes or node sets in local rectangular, cylindrical, or spherical systems (see “Specifying a local coordinate system for the nodal coordinates”). Nodal coordinate system definitions cannot be usedįor applying loads and boundary conditions-see “Transformed coordinate systems, ” Section 2.1.5, instead orįor output of components of stress, strain, and element section forces-see “Orientations, ” Section 2.2.5, instead. The transformation affects only the input of nodal coordinates in node definitions. The transformation is done immediately after input and will be applied to all nodal coordinates entered or generated after the nodal coordinate system is defined.
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You can define a nodal coordinate system Abaqus will translate and rotate the local ( ) coordinate values into the global coordinate system. Sometimes it is convenient to define nodal coordinates in a local coordinate system and then transform these coordinates to the global coordinate system. Specifying a local coordinate system in which to define nodes This feature is useful because it allows points to be defined as nodes for mesh generation purposes only. If any node is specified more than once, the last specification given is used.Ībaqus will eliminate all unnecessary nodes before proceeding with the analysis. Mapping a set of nodes from one coordinate system to another. Optionally specifying a local coordinate system in which to define nodes ĭefining individual nodes by specifying their coordinates Ĭreating nodes from existing nodes by generating them incrementally, by copying existing nodes, or by filling in nodes between the bounds of a region and Although the concepts discussed in this section apply in general to the node definitions in the input file that is created by Abaqus/CAE, the methods and techniques described here apply only if you are creating the input file manually. In a preprocessor such as Abaqus/CAE, you define the model geometry rather than the nodes and elements when you mesh the geometry, the preprocessor automatically creates the nodes and elements needed for analysis. This section describes the methods for defining nodes in an Abaqus input file.