Stress analysis: Case
Stress analysis have been done in 6 cases: maximum reaction force in horizontal and vertical direction and in modulus, both in the opening and closing phases.
The mesh setting is:
- Element dimension: 0.05, in relation to the average component dimension
- Local setting: 0.1 mm, in most critical areas
Opening: maximum reaction force acting on pins in horizontal direction
Maximum reaction force: 50 N
Maximum Von Mises stress: 63.77 Mpa
Maximum strain: 0.17 mm
Minimum safety factor: 2.82
Opening: maximum reaction force acting on pins in vertical direction
Maximum reaction force: 37.5 N
Maximum Von Mises stress: 72.76 Mpa
Maximum strain: 0.16 mm
Minimum safety factor: 2.47
Opening: maximum reaction force acting on pins in modulus
Maximum reaction force: 59.6 N
Maximum Von Mises stress: 84.72 Mpa
Maximum strain: 0.28 mm
Minimum safety factor: 2.12
Closing: maximum reaction force acting on pins in horizontal direction
Maximum reaction force: 42.5 N
Maximum Von Mises stress: 57.2 Mpa
Maximum strain: 0.14 mm
Minimum safety factor: 3.15
Closing: maximum reaction force acting on pins in vertical direction
Maximum reaction force: 37.5 N
Maximum Von Mises stress: 73.07 Mpa
Maximum strain: 0.15 mm
Minimum safety factor: 2.46
Closing: maximum reaction force acting on pins in modulus
Maximum reaction force: 51.86 N
Maximum Von Mises stress: 94.01 Mpa
Maximum strain: 0.18 mm
Minimum safety factor: 1.91
The analisys on the case show how the component is well design from a technical stand point.
The maximum stresses are concentrated in the proximity of the attachment of the flap with the frontal case's face, on the contact surface between spring and back face of the case and on the area sorrounding the fillet between the upper face of the case and the screw housing. In all configuration the maximum stress was well under the maximum stress threshold.
Laboratorio Progettuale CAD - Academic year 2015-2016