The purpose of this study is to validate the solver for snap-fit simulations by comparing it to the experimental data presented in the paper. The mating force and the maximum deflection of the snap seen in the simulation has to match the experimental values given in Part IV (Example1) from the reference paper: http://web.mit.edu/2.75/resources/random/Snap-Fit%20Design%20Manual.pdf
The model was created using the geometry dimensions provided on page IV-5 (Fig: IV-4)
Tet-dominant coarse first-order mesh with refinements.
Nonlinear static analysis was performed. For the connection between the two parts was used the penalty contact. Тhe function X=0.015*t. was used to simulate the movement of the hook. The simulation interval was 0.6s.
The vertical displacement obtained from simulation is about 2.3 mm.
The vertical displacement from the geometry point of view is 2.59mm. The difference is due to penetration between the two parts.
Here we have a big difference between the values of deflection forces calculated through the formulas from the reference paper and the ones from the simulation.
Von Mises stress
The value of von Mises stress is above the yield strength of the material.