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The largest supplier of rubber expansion joints, axial Stiffness of rubber expansion joints, Add Stiffness N/cm, radial stiffness, lateral stiffness
The "Add Stiffness N/cm" (additional stiffness) of rubber expansion joints does not have a fixed specific value and is affected by multiple factors.
Specifically as follows:
Material aspect:
The stiffness of different rubber materials varies.
For example, natural rubber has good elasticity but relatively low stiffness.
However, nitrile rubber contains polar groups.
The intermolecular forces are large, and the stiffness is usually higher than that of natural rubber.
In terms of structural design
The increase in the wall thickness of the rubber expansion joint can enhance its ability to resist deformation.
Increase the stiffness; The material, number of layers and weaving method of the reinforcing layer will also affect the stiffness.
If high-strength fibers or steel wires are used as reinforcing layers, the more layers there are,
The tighter the weaving, the higher the rigidity of the rubber joint.
Regarding working conditions:
As the working pressure increases, the stress borne inside the rubber expansion joint also increases.
It will increase its stiffness to some extent;
Temperature changes also have a significant influence on the stiffness of rubber.
Generally, when the temperature rises, the movement ability of rubber molecular chains increases.
The stiffness decreases. Conversely, when the temperature drops, the stiffness increases.
The axial Stiffness (Add Stiffness) of rubber expansion joints under normal temperature and pressure may range from
several N/cm to several tens of N/cm. For example, the stiffness of some small-diameter and low-pressure rubber joints
may be around 5-15N/cm, while that of large-diameter and high-pressure rubber joints may be 20-50N/cm or even higher.
But this is only a rough range. The actual value needs to be determined through experiments.
