The Basis Of Bolt Testing

In the previous article, we analyze The Possible Causes Of Bolt Breakage. In this article, as a professional fastener company, we will continue to describe the basis of bolt testing.

The fatigue fracture of the bolt is mainly related to the stress amplitude when the bolt is connected under load, so the bolt test mainly tests the change of the stress amplitude of the bolt.

Fmax: The maximum tension of the bolt when the unit is working,

Fmin: the minimum tension of the bolt when the unit is working,

As: the nominal stress cross-sectional area of the thread

The equipment carried in the bolt test can record the axial tension of the bolt when the unit is working, so as to obtain the stress amplitude of the bolt connecting the yaw bearing and the base when the unit is working. By comparing the bolt stress amplitude of a frequent bolt breakage unit with that of an unbroken bolt unit, it provides a test basis for subsequent simulation modeling and finds out the real cause of bolt breakage.

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