How to calculate the bolt tension by knowing the axial force

1.

The brief summary is as follows:

in the process of using bolts, the maximum safety tension of bolts is equal to the allowable stress of bolts multiplied by the minimum cross-sectional area of bolts

can be expressed as follows:

A = B / C = b/ π DXD / 4) where B is the force on the bolt, C is the cross-sectional area of the bolt and D is the minor diameter of the bolt

extended data:

bolt detection methods:

are divided into manual and machine

manual detection is the most primitive and common method of consistent detection. In order to rece the outflow of defective procts as much as possible, the general proction enterprise personnel visually inspect the packaged or delivered procts to eliminate the defective procts (including tooth injury, mixing, rust, etc.)

another way is full-automatic machine testing, mainly magnetic particle testing

magnetic particle inspection is based on the interaction of magnetic flux leakage field and magnetic powder at the defect of bolt, aiming at the difference of magnetic permeability between the possible defects (such as cracks, slag inclusion, mixture, etc.) of bolt and steel

after magnetization, the magnetic field at the discontinuity of these materials will change and form a magnetic flux leakage field on the surface of the workpiece at the part of magnetic flux leakage, which will attract the magnetic powder and form the magnetic powder accumulation magnetic mark at the defect

Under proper illumination conditions, the position and shape of the defects can be seen, and the accumulation of these magnetic particles can be observed and explained to eliminate the defective procts

2. Because the diameter of each part is different, the stress of each part is different. If the force is only applied at both ends, then the axial force of each part is the same, and it can be calculated by using the division method. The stress is calculated separately.

3. There is the latest version on the official website

4. LAN Shuo can, about 20.

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8. Entrance / exit C is adjacent to the government affairs service center of Wuhan Economic and Technological Development Zone

zhuanyang Avenue Station

9.

bus route: No.718 → Rail Transit Line 2 → rail transit line 4, the whole journey is about 30.6km

1. Walk about 230m from line 2 to Guanggu Avenue liuzhangwan station

2. Take No.718, pass 14 stops, reach Luoyu road Guanggu Square Station

3. Walk about 310m to Guanggu Square Station

4. Take Rail Transit Line 2, pass 6 stops, Reach Zhongnan Road Station

5, take rail transit line 4, pass 9 stops, reach qilimiao station

6, walk about 800 meters, reach Wuhan Hanyang District Government Affairs Service Center

bus line: no.758 → no.728 → no.646, the whole journey is about 31.5 km

1, walk about 230 meters from line 2 to Guanggu Avenue liuzhangwan station

2, take no.758, After 10 stops, you can get to Guanshan middle school station of Xiongchu Avenue (you can also take No.718 or no.785)

3, 728, 19 stops, yaolu station of Yingwu Avenue

4, 646 stops, 10 stops, Hanqiao Road Station of Hubei Road

5, 230 meters walk to Hanyang District government service center of Wuhan City

10.

bus routes: Rail Transit Line 4

1. Take rail transit line 4 to qilimiao station

2. Walk about 770 meters to Hanyang District government service center of Wuhan City

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