Several tools are available in the Sketcher to help you construct each portion of the rigid part profile:
You can construct an analytical rigid part from any combination of lines, arcs, and parabolic splines; however, the resulting profile must be a single connected (but not necessarily closed) curve. In addition, the curve must be smooth to obtain a converged solution with Abaqus/Standard or Abaqus/Explicit. You may want to apply a sequence of small lines, arcs, or parabolic splines to eliminate any surface discontinuities (Abaqus/CAE does not have an equivalent to the FILLET RADIUS parameter on the Abaqus/Standard and Abaqus/Explicit SURFACE option). For more information on creating parabolic splines and maintaining tangency, see Sketching splines. For more information on the rules governing analytical rigid surfaces, see Analytical rigid surface definition. A sketch of an analytical rigid part that includes a line, an arc, and a fillet is illustrated in Figure 1. Figure 1. A sketch of an analytical rigid part.
An analytical rigid part is defined completely by the two-dimensional profile of the base feature that you create with the Sketcher; consequently, the Part module tools cannot be used to add features when you return to the Part module from the Sketcher. You can modify the part only by editing the original sketch. After you create an analytical rigid surface, you must assign a rigid body reference point to it. You control the motion of the analytical rigid surface by constraining or prescribing the motion of the reference point. For more information, see The reference point. |