Abaqus spatial model definition is the practical specification of the finite element mesh and model topology: nodes, elements, sets, coordinate systems, sections, distributions, and optional model-level mass or display definitions.
How It Works
Nodes are assigned numbers and coordinates, optionally in local coordinate systems. Node numbers are unique within their scope, and local coordinates are transformed into the working system when the model is read. Node sets provide reusable groups for constraints, loads, interactions, and output requests.
Elements are defined by element number, element type, and connectivity. Element type selects the formulation from the Abaqus Element Library, while connectivity maps the element's local topology to node numbers. Element sets group elements for section assignments, material behavior, output, surfaces, or load definitions.
The guide also covers generated, copied, filled, and mapped node or element definitions, plus distributions, nonstructural mass, mass adjustment, display bodies, and integrated output sections. These features turn the mesh into an analysis-ready model rather than just a list of coordinates and connectivities.
Why It Matters
Spatial model definition is where the mathematical finite element discretization becomes concrete. It determines the geometry, topology, degrees of freedom, element formulation, and grouping structure that later procedures and output requests operate on.
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