CSWE Surface Modeling & Complex Geometry Flashcards

In SOLIDWORKS, what is the fundamental difference between a 'Surface Body' and a 'Solid Body'?

Answer: Surface bodies have no thickness and are not enclosed volumes, while solid bodies are fully enclosed watertight volumes

Surface bodies are zero-thickness geometric shells with no enclosed volume, whereas solid bodies are fully enclosed, watertight geometries that represent material volume.

Which SOLIDWORKS surfacing command creates a smooth surface that fills a planar or non-planar opening bounded by existing edges?

Answer: Fill Surface

The Fill Surface tool generates a surface patch that closes an opening defined by a closed boundary of edges, with controllable tangency conditions at each edge.

When using a SOLIDWORKS 'Boundary Surface', what is the purpose of defining both Direction 1 and Direction 2 curves?

Answer: Direction 1 and Direction 2 curves define the surface shape in two crossing directions, providing more control than a loft

Boundary Surface uses two sets of crossing guide curves to precisely control the surface shape in both parametric directions, yielding higher-quality curvature than a standard loft.

What does the 'Curvature Continuous (G2)' tangency condition in SOLIDWORKS surface tools guarantee compared to 'Tangent (G1)'?

Answer: G2 ensures matching curvature radius at the boundary so the transition is visually smoother and highlight streaks are eliminated

G2 (Curvature Continuous) matches both the tangent direction and the curvature magnitude at the boundary, eliminating visible highlight breaks that G1 (Tangent) transitions can exhibit.

Which SOLIDWORKS command knits multiple surface bodies into a single surface body, and optionally converts them to a solid if they form a closed volume?

Answer: Knit Surface

The Knit Surface tool merges adjacent surfaces into one surface body, and if 'Try to form solid' is checked and the result is watertight, it converts to a solid body.

In SOLIDWORKS, what is the 'Zebra Stripes' display tool used to evaluate?

Answer: Surface curvature continuity and smoothness across face boundaries

Zebra Stripes simulate light reflection to make surface curvature discontinuities visible — smooth, unbroken stripes indicate good G2 continuity, while kinks or breaks indicate G0/G1 transitions.