Analysis of spring failure

Spring is one of the important basic components in mechanical products. It has many kinds, which can be divided into spiral spring, plate spring, disc spring, ring spring, plane (truncated cone) volute spring, etc.; according to the bearing characteristics, it can be divided into compression, tension, torsion and other springs. There are also methods to divide springs according to forming mode and material
Usually work, often have customers to consult us about the spring work fault is what causes. Hope the above information will help you
The main failure modes of spring are: fracture, deformation, relaxation and wear. The main analysis is fracture and deformation (relaxation)
1. Brittle fracture: the vast majority of spring fracture belongs to brittle fracture. Only when the working temperature is high, plastic fracture may occur. In engineering, fatigue fracture, stress corrosion fracture and hydrogen embrittlement fracture are called brittle fracture. For example, if disc spring works in high temperature or low temperature environment for a long time, its microstructure will change slowly and embrittlement will occur
2. Fatigue fracture: the fracture of spring under cyclic load
3. Stress corrosion fracture: under the combined action of tensile stress and corrosive medium, spring fracture occurs. For example, the disc spring bears tensile stress when it is working. When the disc spring is unloaded, the residual tensile stress still remains in its interior. If the disc spring works in an acidic liquid or humidity environment for a long time, hydrogen in the solution will accumulate under the tensile stress, When the nucleation work of the crack is greater than the stress intensity factor of the crack tip, the nucleation and propagation of the environmental brittle fracture microcracks appear
4. Corrosion fatigue fracture: the fracture of spring under the combined action of cyclic load and corrosive medium
5. Hydrogen brittleness, cadmium brittleness and black brittleness: brittle fracture caused by high impurity content in spring material
6. Wear: wear is divided into abrasive, fatigue and corrosion wear fracture