ABSTRACT
A snap-fit joint is an economical and quick method of joining plastic parts. A snap-fit joint can be designed either to be easily separated or to be inseparable without breaking one of its components. The strength of the snap-fit joint depends on the material used, its geometry, and the forces acting on the joint. Most snap-fit joint designs share the common design features of a protruding ledge and a snap foot. Whether snap joints are cantilever or cylindrical fit, they function similarly. When snap-fit joints are being designed, it is important to know the mechanical stresses to be applied to the snap beams after assembly, the required mechanical stresses or strains on the snap beams during assembly, the number of times the snap joint will be engaged and disengaged, and the mechanical limits of the material(s) to be used in the design.
