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Part Design: Cantilever Snap-Fit
Critical Constraints
- Snap length and deflection are the two most critical factors
in snap-fit design.
- Latch deflection must return to the zero position after engagement to prevent stress relaxation (creep).
Notes:
The Cantilever Snap-Fit Design Analysis Wizard is available in the Technical Solutions section of www.eastman.com. It calculates the theoretical strain that occurs when a snap-fit latch is deflected. The maximum strain occurs on the outer layer of the thickness, usually at the base of the latch. Strains can also be calculated for a latch, which varies linearly in both thickness and width from the base of the tip to the latch.
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