In a 3D modeling context, what does the term “rib” typically refer to?

In a 3D modeling context, the term "rib" refers to a supporting structure within a body. Ribs are typically used to enhance the strength and rigidity of a part without adding significant weight. They extend from one surface of a part to another and are often employed in mechanical and structural design to support areas that are subject to stress or to create alignment between components.

Ribs help in distributing loads and can improve the overall performance of a design by preventing deformation during use. For instance, in plastic injection molding, ribs are crucial for ensuring that parts maintain their shape and integrity while being lightweight. This makes them an essential feature in the design of many types of products, from automotive components to consumer goods.