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Delamination damage analyzing method of composite material laminated plate interference bolt mounting process

A technology of layers of composite material, installation process, applied in the direction of analyzing materials, measuring devices, instruments

Active Publication Date: 2016-01-27
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the interfering installation process of high-lock bolts, the delamination mechanism is similar to that of hole making, but the difference is that in the process of hole making, the concentrated force of the drill tip causes delamination, while in the process of interfering installation of high-lock bolts, it is distributed in the high The uniform force around the lock bolt compresses the hole wall to cause a downward displacement, which in turn leads to delamination

Method used

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  • Delamination damage analyzing method of composite material laminated plate interference bolt mounting process

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Embodiment Construction

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0030] After in-depth exploration of the internal causes of stratification, the applicant proposes that whether stratification occurs can be judged by calculating the stratification determination factor. Its theoretical study took the following steps:

[0031] (1) According to the classical laminated plate theory, the converted stiffness coefficient of the non-material main direction of the single-layer plate is calculated from the engineering elastic constant of the material and the ply angle And accordingly calculate the flex...

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PUM

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Abstract

The invention provides a delamination damage analyzing method of a composite material laminated plate interference bolt mounting process. The critical delamination force of each layer of a composite material laminated plate is obtained through analytic calculation, and a delamination judging factor is obtained by comparing the critical delamination force with friction force among bolt holes, so that whether delamination is caused or not is judged. According to the method provided by the invention, the practical distribution characteristic of the acting force causing delamination, the parameters, such as laminated plate rigidity and interference amount are considered, so that structural delamination can be effectively judged.

Description

technical field [0001] The invention belongs to the field of advanced assembly and connection technology, and specifically relates to a delamination damage analysis method in the installation process of composite laminated plate interference bolts, which can obtain the critical delamination force of each layer and judge the damage caused by different interference quantities in the installation process of high-lock bolts. The delamination damage situation, and the initial location where the delamination damage occurs, provide theoretical support for the installation process. Background technique [0002] With the gradual popularization and application of composite structural parts in advanced manufacturing fields such as aircraft and automobiles, their connection forms have received extensive attention and development. Among them, interference connection, as a new type of connection to improve structural connection strength and fatigue life, has become a research hotspot in r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00
Inventor 张开富邹鹏程晖刘平谢欢欢姜敏晖
Owner NORTHWESTERN POLYTECHNICAL UNIV