The Partition Icon is used to achieve this. I am loading the inside of the hole, so the material immediately abutting the load must remain intact by designating it a non-design space. The new faces created by the line intersections are then pulled through the body using the Push/Pull icon, creating an extruded cut. Two lines are snapped to the corners of the surface. By clicking on the line feature in the Points/Lines icon, a sketching toolbar appears. Inspire has some neat tools to do this within a versatile geometry creation and manipulation set. I want to slice the corners off of my initial design space to make the topology search more efficient as described. It is a good idea to make this kind of assessment of design space, maybe even to try a set of exploratory FEA studies on broad design space options to understand useful limits. So, my width limit skews the resulting configuration.

The bending load case would naturally want a wide base to provide the biggest reacting couple. In this lug, the width is a controlling factor.

Conversely, if too much material is clipped from the initial design space, then the final configuration can be skewed away from a more “natural” result. If the redundancy is removed, then 50% Volume Fraction is literally attacking the meat of the problem in the 10 cubic inches of design space left. A tighter initial design space can be defined and has the advantage of reducing the element count in the underlying FEA and making the target Volume Fraction reduction more focused on critical material.Ī 50% Volume Fraction used on 20 cubic inches, with 10 cubic inches is redundant and is not effective in driving toward a useful configuration. From engineering basics, a lot of the material is not needed above the hole. The lug will carry axial loads and side loads. The vertical part is the design space the base is a non-design space. My objective was to create a lug-like configuration starting from the geometry shown in Fig. 5: Initial design space, loading and constraint.

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