A brief description of the calculation of the bearing capacity of a single bolt

The maximum external force that each bolt can withstand to ensure normal operation without damage is called the load-bearing force of the bolt. When a bolt may have several failure forms after being stressed, the bearing capacity corresponding to the several failure forms should be obtained, and the smallest of them is the bearing capacity of the bolt.

(1) Bearing capacity of each shear bolt

Shearedu003dnv(153-29)

Pressureu003dd(15-3-30)

Take the smaller of the two as the bearing capacity of a bolt to express.

where nv is the number of shear surfaces of a bolt;

d--The diameter of the bolt rod;

Design value of shear strength of bolt rod; (Guide: Introduction to drawing process and cold forging process)

The smaller total thickness of the pressure-bearing member in the same direction of force;

The design value of the bearing strength of the hole wall of the bolt connection.

(2) The bearing capacity of each tension bolt

u003du003dAe(15-3-31)

where de--the effective diameter of the bolt thread;

Ae--the effective area of u200bu200bthe bolt thread;

Design value of the tensile strength of the bolt.

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