In 3D modelling, one of the most challenging aspects for designers is the update of dress-up features such as Edge fillet  and Face-Face fillet. Due to design modifications or increased geometric complexity, these fillet features frequently encounter update errors or computation failures. As a result, designers often spend significant time manually adjusting radius values to suit evolving geometric conditions. This not only reduces design productivity but may also compromise the quality and continuity of the resulting fillet surfaces. The Adapt Fillet Radius strategy plays a critical role in mitigating such issues. It dynamically adjusts fillet parameters to maintain feature robustness and surface quality during updates.

This technical practice focuses on the Adapt Fillet Radius strategy within resilient modelling. This strategy addresses update errors in Edge Fillet and Face Fillet features that result from incompatible radius values. When applied to a fillet feature in error, the strategy allows the designer to define positive and negative deviation limits through the Radius Deviation parameters. Based on these limits, the system recalculates and rebuilds the affected fillet feature using an adjusted radius value, thereby restoring feature validity and ensuring model continuity.

All roles that include the Part Design app, Part Design Plus app, Generative Shape Design app and Generative Shape Design Plus app

Mechanical Designers, Conceptual Designers, Mechanical Surface Designers

Radius Adaptation Sequence:

The strategy evaluates alternative radius values in the following sequence:

1st build: Current radius − 1% of negative deviation

2nd build: Current radius − 10% of negative deviation

3rd build: Current radius − 100% of negative deviation

4th build: Current radius + 1% of positive deviation

5th build: Current radius + 10% of positive deviation

6th build: Current radius + 100% of positive deviation

This ordered evaluation ensures minimal deviation from the original design intent while maximizing the likelihood of successful feature regeneration.

Use Case: Update edge fillet radius in defined deviation

Scenario: In a 3D design, when you need to update the rib thicknesswhich has edge fillets as child features.You can implement the Adopt Edge Fillet Radius strategy to retain the child feature outputs. This ensures robust updates even when the parent geometry changes. 

Play the video to watch how to update the edge fillet radius within defined deviation.

To learn more about Adapt Fillet Radius, explore the M3S learning module.