As an important shock absorbing element, rubber shock absorbers have been widely used in various types of machinery, automobiles, railway locomotives, water transport vehicles, aircraft and other aircraft. It can be said that rubber shock absorbers need to be used wherever shock absorption and isolation are required. The reason why rubber shock absorbers are so widely used is that it effectively utilizes the following properties of rubber:
1. Rubber has high elasticity and viscoelasticity;
2. Compared with steel material, rubber has large elastic deformation and small elastic modulus;
3. The impact stiffness of rubber is greater than the dynamic stiffness, and the dynamic stiffness is greater than the static stiffness, which is conducive to reducing impact deformation and dynamic deformation;
4. The stress-strain curve is an elliptical hysteresis line, and its area is equal to the vibration energy (damping) converted into heat by each vibration cycle, which can be adjusted by formula design;
5. Rubber is an incompressible material (Poisson's ratio is 0.5);
6. The shape of the rubber can be freely selected, and the hardness can be adjusted by formula design, which can meet the requirements of stiffness and strength in different directions.
