Computer models driven by dimensions and constraints that update automatically.
Parametric CAD builds models from sketches, dimensions and features (extrude, revolve, fillet) with relations. Changing a parameter regenerates the model. Assemblies mate parts; drawings and CAM derive from the 3D model.
Changing a bolt length parametrically updates a whole assembly.
CAD models let designers test shapes, check interference and generate drawings, and parametric links keep the model consistent when dimensions change.
Computer models driven by dimensions and constraints that update automatically.
CAD models let designers test shapes, check interference and generate drawings, and parametric links keep the model consistent when dimensions change.
A model built from features and constraints that are driven by parameters. Changing a dimension updates the geometry automatically.
Constraints fix geometry relationships, so the model stays stable and predictable when edited.
Typical applications include changing a bracket width in a model and having holes and rules update, checking the clearance between a moving arm and a fixed frame in the model and generating a drawing and bill of materials from a 3D assembly.
Study "Engineering drawings" first (topic 97 of 106 in Engineering Mechanics). It covers the groundwork this topic builds on.
Design intent in constraints. History tree. Simulation integration.
Changing a bolt length parametrically updates a whole assembly.
The next topic is "Finite element analysis in mechanics", which builds directly on this one.
It is classed as Advanced in Engineering Mechanics (topic 98 of 106). It is an advanced topic. It assumes you are comfortable with the intermediate topics in Engineering Mechanics.
Want to practise? Open the interactive course for quick checks, quizzes, simulations and progress tracking.