OS-E: 0155 Snap-Fit Analysis (CONSLI versus FINITE)
Snap-fit is a combination of two components namely mating and base part which form a mechanical attachment between them by means of locators, locks and enhancements. Nonlinear Static Analysis with large displacement theory is used to solve this example.
![](../../../images/solvers/snap_fit_analysis_fe_model.png)
Figure 1. FE Model
Model Files
Refer to Access the Model Files to download the required model file(s).
The model file used in this example includes:
snap-fit.fem
Model Description
- FE Model
- Element Types
- CTETRA
- MAT1 and MATS1
- Young’s Modulus
- 2700 MPA
- Poisson's Ratio
- 0.35
- Initial Density
- 1.04E-9 Mg/mm3
Stress versus Strain curve is defined with MATS1.
Results
![](../../../images/solvers/snap_fit_analysis_element_stress_contour.png)
Figure 2. Element Stress Contour
Concludes that the high stress concentration areas (Figure 2) are sensitive to the ramp-angle of the block, thickness of the flap and sharp corners. Such problem areas can be improved by means of notches, appropriate angles on the mating and base parts, respectively.
![](../../../images/solvers/snap_fit_analysis_finite_vs_continuous.png)
Figure 3. Finite Sliding versus Continuous Sliding