What are the outstanding performances of the rubber material of mechanical rubber shock absorber in fatigue resistance?
Publish Time: 2024-12-10
The rubber material of the mechanical rubber shock absorber has a series of outstanding performances in fatigue resistance, which is mainly due to the unique physical and chemical properties of rubber materials. The following is a detailed analysis of the performance of rubber materials in fatigue resistance:
1. Fatigue resistance of rubber materials
High elasticity and viscoelasticity: Rubber materials have a freely curled molecular configuration, which makes rubber highly elastic and viscoelastic. This property enables rubber to undergo large elastic deformation when subjected to external forces, thereby absorbing and dispersing energy and reducing the impact of shock and vibration on mechanical equipment. At the same time, the viscoelasticity of rubber also enables it to gradually adapt to and slow down the changes in stress when subjected to periodic stress, thereby improving fatigue resistance.
Stress-strain characteristics: The stress-strain curve of rubber materials is an elliptical hysteresis line, and its area is equal to the vibration energy (damping) converted into heat in each vibration cycle. This characteristic enables rubber to convert part of the mechanical energy into heat energy when subjected to external forces, thereby dissipating energy and reducing fatigue damage.
2. Specific application performance of rubber materials in fatigue resistance
Fatigue resistance deformation: The elastic modulus of rubber materials is small and can produce large elastic deformation. This characteristic enables the rubber shock absorber to quickly restore its original shape when subjected to external force, reducing permanent deformation and fatigue damage caused by long-term stress.
Anti-fatigue damage: During the repeated deformation process of rubber materials, when the local deformation stress it bears exceeds the elongation or stress limit of the rubber, the fatigue process begins. However, due to the interaction between rubber molecular chains and the existence of cross-linked structures, rubber materials can gradually adapt to and slow down the changes in stress when subjected to periodic stress, thereby improving their ability to resist fatigue damage.
Durability: Rubber materials also show good durability in terms of fatigue resistance. Due to the simple structure, easy use and maintenance, no wear, no rust, and no need for oil lubrication, rubber shock absorbers can maintain stable performance and extend their service life during long-term use.
3. Factors affecting the fatigue resistance of rubber materials
Molecular structure: The molecular structure of rubber materials has an important influence on their fatigue resistance. The length of the molecular chain, the cross-linking density, and the interaction between molecular chains will affect the elasticity and viscosity of the rubber, thereby affecting its fatigue resistance.
Fillers: Adding an appropriate amount of fillers such as carbon black to rubber materials can improve the hardness and wear resistance of rubber, and also help improve its fatigue resistance.
Use environment: The use environment of rubber materials will also affect their fatigue resistance. For example, environmental factors such as temperature, humidity, oxygen and ozone will accelerate the aging and fatigue damage of rubber.
The rubber material of mechanical rubber shock absorbers performs well in fatigue resistance, which is mainly due to its high elasticity and viscoelasticity, stress-strain characteristics and good durability. At the same time, the fatigue resistance of rubber materials can be further improved by optimizing the molecular structure, adding an appropriate amount of fillers and improving the use environment.
