Springs are one of the important basic components in mechanical products. There are many types of it, divided by shape: spiral spring, plate (plate) spring, disc spring, ring spring, flat (truncated cone) snail coil spring, etc; According to their load-bearing characteristics, they are divided into compression, tension, torsion springs, etc.
The stress borne by springs mainly includes bending stress, torsional stress, tensile and compressive stress, and composite stress.
The main failure modes of springs are: fracture, deformation, looseness, and wear. The main analysis is fracture and deformation (relaxation).
1. Brittle fracture: The vast majority of spring fractures belong to brittle fracture. Plastic fracture is only possible when the working temperature is high. In engineering, fatigue fracture, stress corrosion fracture, and hydrogen embrittlement fracture are referred to as brittle fracture
2. Fatigue fracture: The fracture of a spring under cyclic loading.
3. Stress corrosion fracture: The phenomenon of spring fracture is caused by the combined action of tensile stress and corrosive media.
4. Corrosion fatigue fracture: The fracture of a spring under the combined action of cyclic load and corrosive medium.
5. Hydrogen embrittlement, cadmium embrittlement, and black embrittlement: brittle fracture caused by high impurity content in spring materials.
6. Wear: Wear is divided into: abrasive, fatigue, and corrosion wear fracture.
