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A Strength Calculation Method for Simultaneous Tension and Shear Bolts

A strength calculation and bolt technology, applied in the field of structural strength design, can solve problems such as complex calculations and poor pertinence

Active Publication Date: 2022-03-18
JIANGXI HONGDU AVIATION IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned deficiencies in the prior art, the present invention provides a method for calculating the strength of bolts under tension and shear at the same time. By summarizing empirical data, the calculation method researches and proposes a calculation method to effectively solve the problem of traditional fourth strength theory calculation. The lack of pertinence and complex calculation of the method

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  • A Strength Calculation Method for Simultaneous Tension and Shear Bolts
  • A Strength Calculation Method for Simultaneous Tension and Shear Bolts

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Embodiment Construction

[0018] The technical solutions in the present invention will be described in conjunction with one embodiment.

[0019] Suppose one material is 30 crmnsia, a bolt with a diameter of 6 mm, is also subject to a tension and shear force, 30crMnsia σ. b = 1080MP a .

[0020] First, the bolt strength is calculated according to the method steps of the present invention:

[0021] The bolt stress is,

[0022] Bolt shear stress,

[0023] Shear coefficient k is,

[0024] : = 353.86MP a ≤0.65σ b = 702MP a ;

[0025] τ = 353.86MP a ≤ τ b = Kσ b = 569.16;

[0026] The safety margin is:

[0027] Second, calculate the bolt intensity according to the fourth intensity theory:

[0028] The stress of the bolt is:

[0029] The bolt shear stress is:

[0030] Bolt induction is:

[0031] The safety margin is:

[0032] Finally, in a comprehensive comparison, the bolt safety margin obtained by the calculation method of the present invention is larger than the fourth intensity theory, and the applica...

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Abstract

The invention provides a method for calculating the strength of bolts under tension and shear at the same time. The method is mainly based on experience and statistical data, summarizing the calculation formula of the shear coefficient K. When the bolt is simultaneously under tension and shear, the failure shear stress According to the formula τ b ≤Kσ b Calculation, strength calculation and design, the tensile stress and shear stress in the bolt must satisfy σ≤0.65σ at the same time b and τ≤τ b Constraint conditions, so as to accurately calculate the bearing capacity of the bolt. The method for calculating the strength of bolts under simultaneous tension and shear according to the invention can effectively improve the utilization efficiency of bolts, be closer to engineering practice, and effectively reduce the weight cost of conservative design of structures.

Description

Technical field [0001] The present invention belongs to the field of structural strength design, and is specifically a method of calculating the strength of the shear bolt simultaneously. Background technique [0002] Mechanical structural strength design and calculation, bolts are complex, such as most of the main supporting structures of the aircraft are bolt connections, with bolts simultaneously pulled the most common. The conventional method is accomplished by simultaneously pulling the strength of the shear bolt. However, the calculation step is complicated by the fourth intensity theory, and the engineering application is poor. [0003] If you can design and verify based on multiple bolt intensity tests and multiple aircraft type bolt intensity, according to relevant experience and data, comprehensive analysis data, summarize a new aircraft bolt simultaneously, the intensity calculation method, then Can more accurately calculate the load capacity and safety margin of the b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17G06F30/15G06F111/04G06F119/14
CPCG06F30/17G06F30/15G06F2119/14G06F2111/04
Inventor 张里伟张宪政朱亲强黄晓霞胡益富龚思楚侯方万志强黄瑞泉夏佳丽
Owner JIANGXI HONGDU AVIATION IND GRP