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Optimization method of bolt thread height

An optimization method and thread technology, applied in the field of optimization, can solve the problems of bolt connection failure, prone to creep relaxation, etc., and achieve the effect of ensuring high strength and uniform bearing ratio

Active Publication Date: 2022-06-03
CHONGQING UNIV OF TECH
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  • Application Information

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Problems solved by technology

Due to the existence of aluminum alloy materials, aluminum alloy materials have good viscoelastic properties compared with steel materials, especially in the thickness direction, so the use of aluminum alloy materials makes the bolted joint composite structure more prone to creep relaxation, resulting in bolted joints premature failure

Method used

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  • Optimization method of bolt thread height
  • Optimization method of bolt thread height
  • Optimization method of bolt thread height

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Embodiment Construction

[0024] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0025] A method for optimizing the thread height of a bolt provided by the invention comprises the following steps:

[0026] S1. Establish the geometric model of the bolt connection, and convert the geometric model into a 2D model; wherein, the geometric model is realized by ProE or Catia software;

[0027] S2. Carry out grid division to 2D model; Grid division is carried out grid division by Hypermesh or Ansa software;

[0028] S3. Input the meshed 2D model into the finite element analysis software for processing; wherein, the finite element software adopts Abaqus;

[0029] S4. Establish the contact pair about the bolt in the finite element analysis software, and set the processing parameters according to the contact pair; wherein, the processing parameter setting includes the contact attribute of the thread pair and the contact attribute of the connector, including...

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Abstract

A method for optimizing the thread height of a bolt provided by the present invention comprises the following steps: S1. Establishing a geometric model of the bolt connection, and converting the geometric model into a 2D model; S2. Carrying out grid division of the 2D model; S3. The 2D model after meshing is input into the finite element analysis software for processing; S4. Establish the contact pair about the bolt in the finite element analysis software, and set the processing parameters according to the contact pair; S5. In the finite element software, the bolt Apply boundary conditions; S6. Simulate the pre-tightening force loading on the bolts, and analyze the bearing ratio of each thread of the bolt; S7. Build a calculation model for the height of the bolt threads, and obtain the optimized thread height; it can make the thread of the bolt The teeth have a reasonable height to meet the load requirements in the application environment, and can effectively ensure the long-term stability and reliability of the bolts in high-strength, high-temperature environments.

Description

technical field [0001] The invention relates to an optimization method, in particular to a method for optimizing the thread height of a bolt. Background technique [0002] Bolt connection has been widely used because of its advantages of simple structure, convenient disassembly and low cost, especially bolt connection has played an important role in many modern engineering structures. However, due to the structural characteristics of bolted connections, there are common problems such as stress concentration and uneven load distribution between thread teeth, which affect the strength and reliability of bolted connections to a certain extent. When a bolted composite structure works in a high-temperature environment, fluctuations in temperature and other environments may affect its structural strength and reliability, resulting in bolt loosening and premature fatigue failure. [0003] In the use of bolts, such as for engine cylinder head bolt connection, the material of engine...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17G06F30/23
CPCG06F30/17G06F30/23
Inventor 何联格张斌
Owner CHONGQING UNIV OF TECH
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