Can you bend a solid part like it was made of rubber in SolidWorks?

ByCADbrief Staff

Short Answer

Yes — in SolidWorks, you can bend a solid part like it was made of rubber by using the Flex feature, which is the most common professional method for deforming solid geometry without rebuilding the model. It works well for controlled bends, twists, tapers, and stretches. Limitation: severe deformation can easily damage or distort downstream features.

What You Need to Know Before

Warning: Flex does not behave like true material simulation, so it only reshapes geometry and does not calculate realistic rubber mechanics. Complex imported bodies, thin features, or fillets near the bend area often fail or produce self-intersecting geometry.

How to Bend a Solid Part in SolidWorks

  • Command: Flex

  • Shortcut: No default keyboard shortcut

  • Quick Steps:

    1. Go to Insert > Features > Flex or use the Features tab on the CommandManager.
    2. Select the solid body, then choose Bending in the Flex PropertyManager.
    3. Adjust the Triad and trim planes, then enter the Bend Angle value and confirm the preview before clicking OK.

Variables & Settings

  • Key Setting: Trim Planes

  • Expert Setting: Trim Planes control which portion of the body is affected by the Flex deformation. If they are too wide, the entire part may deform unpredictably; if too narrow, the bend may look abrupt or fail near detailed features.

Why it Fails

  • Cause 1 (Geometry): The body has fillets, thin walls, or complex faces that collapse or self-intersect during bending.

  • Cause 2 (layers/Locks): The part may contain imported or locked external-reference geometry that does not update cleanly after Flex is applied.

  • Cause 3 (Command/Logic): Flex is a deformation tool, not a sheet metal or simulation command, so excessive bend angles or poor trim plane placement often break the feature.

Quick Fix & Best Practice

  • Quick Fix: Suppress small fillets and cosmetic details first, apply Flex, then rebuild and re-add those features afterward if needed.

  • Manager’s Verdict: Use Flex for concept models, ergonomic shapes, and quick design changes; avoid it for production-critical geometry where exact manufacturable bends or physics-based rubber behavior are required.

FAQ

Can Flex bend only part of a solid body?
Yes, by positioning the trim planes around the area you want to deform.

Is Flex the same as sheet metal bending in SolidWorks?
No, Flex deforms solid geometry, while sheet metal tools create manufacturable bends.

Can you make a part look twisted instead of bent?
Yes, the same Flex command also supports Twist, Taper, and Stretch modes.

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