Surface models Fillet surfaces

Fillet surfaces are created along a common edge of two surfaces or between two surfaces having no common edge. A fillet surface is created as an individual surface entity. The model saves information about the original and the fillet surface in the history of the model construction. The radius of a fillet can be ... 

A series of filleting operations may produce a complex set of analytic surfaces and curves. Advanced filleting methods can fit a single or several free form surfaces to replace a large number of analytical curves and surfaces. Fillets in advanced shape models are often created as free form surfaces instead of as simple analytic surface segments. However, continuity constraints do not allow too many variations of their shape. 

Open and closed line and curve primitives are available in modeling systems. Open primitives are the line, polyline, arc, hyperbola, parabola, and free form curve. Closed primitives are the rectangle, circle, ellipse, and free form curve. Chains of open primitives play a very important role as open and closed compound lines in the construction of shape models. Chamfers and fillets can be defined at sharp connection points of primitives. The suitability of a compound line as an input entity for surface creation is restricted by the demands of the selected type of surface. A compound line containing break points, for example, cannot be applied at the creation of certain surfaces in certain modeling systems. 

Surface Mount Leadless ICA Joint. To gain an insight into the cracking mechanisms of the leadless ICA joint, a 2D plain strain model was constructed for linear elastic FEM analysis (Ref 18). It consisted of a 1206 chip resistor with tin terminals, an FR4 board with copper pads, and ICA joints. Table 5 summarizes all material properties used in the analysis. The standoff and fillet heights were set as 40 and 125 pm, respectively. For simplicity, the cross-sectional shape... 

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