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Evan.99
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Is there an optimum number of washers to be used on a threaded bolt in respect to dissipation of energy towards the nut? And how would one calculate the dissipation rate of each washer?
Standard washers have two main purposes: To distribute the pressure of the nut evenly over the surface, so that the surface isn't damaged, and To ensure that the nut is pressed against a smooth surface, reducing the chance that it'll gradually loosen because it's in contact with an uneven surface. Another use for a washer is to reduce the friction when tightening and loosening. You can reach a greater tension on the bolt with a washer and when removing a bolt less torque is needed to break the bolt free from it tightened position. The so-called dissipation has to do with torque. The Washer should have a hardness that complies with the pressure expected based on the torque specification of the bolt.Evan.99 said:Is there an optimum number of washers to be used on a threaded bolt in respect to dissipation of energy towards the nut? And how would one calculate the dissipation rate of each washer?
If the hole is considerably larger than the shank people use multiple washers of different sizes to compensate instead of using a larger diameter bolt, washer and nut. Washers are used to spread the load of a bolt or screw over a larger area or to help prevent loosening under vibration.Evan.99 said:Ok, cheers. So just to clarify, adding more washers between the nut and the surface gives no advantage in terms of allowable tension applied to the nut or ease of releasing the nut again?
Energy dissipation of steel washers is the process of converting mechanical energy into heat energy when the washer is subjected to external forces or loads.
Energy dissipation occurs in steel washers due to the friction between the washer and the surface it is in contact with, as well as the internal friction within the material of the washer itself.
Energy dissipation is important in steel washers because it helps to reduce the amount of energy that is transmitted to other components or structures, preventing damage or failure. It also helps to absorb and dissipate excess energy, reducing vibrations and noise.
Energy dissipation can be measured in steel washers by calculating the amount of heat energy produced during the dissipation process, using techniques such as thermography or thermocouples.
The energy dissipation of steel washers can be affected by factors such as the material properties of the washer, the surface roughness of the contact surface, the magnitude and frequency of the external forces, and the temperature and humidity of the environment.