CN-122016487-A - Composite material hole interference bushing installation damage detection system and method

CN122016487ACN 122016487 ACN122016487 ACN 122016487ACN-122016487-A

Abstract

The invention relates to the technical field of composite material hole reinforcement, in particular to a method for detecting the installation damage of a composite material hole interference bushing, which comprises an interference bushing installation device, a composite material Kong Kongzhou strain monitoring system and a composite material hole interference process damage acoustic signal monitoring device. The interference bushing installation device adopts a hydraulic loading mode to enable a core rod to penetrate through a metal bushing so as to realize bushing expansion deformation, the deformed bushing and a composite material hole form interference fit so as to internally realize reinforcement of the composite material hole, meanwhile, the core rod displacement and installation resistance in the installation process are recorded through a hydraulic system sensor, the composite material Kong Kongzhou strain detection device is used for realizing damage monitoring in the bushing expansion process through recording hole circumferential strain in the installation process, and the composite material hole interference process damage acoustic signal monitoring device is used for realizing damage type analysis in the bushing expansion process through clustering analysis of collected acoustic signals. The comprehensive evaluation of the installation damage of the composite material hole interference bushing is realized through the multidimensional comprehensive analysis of displacement, resistance, strain and acoustic signals, and theoretical support is provided for the application of the interference reinforcement method in the field of composite material hole reinforcement.

Inventors

QIU JIANPING
ZHU YANRU
ZHAO XIAOLIAN
YANG SHIJIE
MENG WEIHAO
He Qiya

Assignees

中航西安飞机工业集团股份有限公司

Dates

Publication Date: 20260512
Application Date: 20251203

Claims (8)

1. A composite hole interference bushing installation damage detection system, the system comprising: The device comprises an interference bushing mounting device, a composite material Kong Kongzhou strain detection device, a composite material hole interference process damage acoustic signal monitoring device and a mounting damage comprehensive evaluation device; The interference bush mounting device is used for realizing the mounting process of the interference bush; the composite material Kong Kongzhou strain detection device is used for detecting hole circumference strain data of a composite material hole in the installation process of the interference bush; the composite material hole interference process damage acoustic signal monitoring device is used for detecting acoustic signal damage data of the composite material hole in the interference bush installation process; the comprehensive installation damage evaluation device is used for storing and analyzing hole circumference strain parameters, recording various acoustic signal parameters and analyzing the detection result of the acoustic signal damage in the installation process.
2. The composite hole interference bushing installation damage detection system of claim 1, wherein the interference bushing installation device comprises: A hydraulic loading head (2) is internally provided with a displacement and resistance sensor, and one end of the hydraulic loading head is connected with the core rod (3); The core rod (3) is in a spindle shape with thick middle and thin two ends, one end of the core rod is clung to the hydraulic loading head (2), and the other end of the core rod is coaxially arranged with the bushing (4); A bushing (4) which is in clearance fit with a hole in the composite material perforated plate (11), and the lower surface of which is contacted with the slotted washer (6); a composite material perforated plate (11), the perforated position of which is in clearance fit with the bushing (4), and the lower surface of which is in contact with the slotted washer (6); A split washer (6) with an upper surface in contact with the composite split plate (11) and the bushing (4) and a lower surface in contact with the support plate (10); The lower surface of the supporting plate (10) is fixed with the ground, and the upper surface of the supporting plate is contacted with the slotted washer (6) and is used for reserving a space for the core rod to pass through.
3. A composite hole interference bushing installation damage detection system according to claim 2, wherein the split washer (6) has an inner hole dimension between the outer diameter and the inner diameter of the bushing (4) to provide support during installation and allow for smooth passage of the mandrel (3).
4. The composite hole interference bushing installation damage detection system of claim 1, wherein the composite Kong Kongzhou strain detection device comprises: The strain gauge (5) comprises two strain gauges, and is adhered to the surface of a hole close to the composite material perforated plate (11) in a gluing way; the resistance strain gauge (7) is connected with the strain gauge (5) and used for collecting strain parameters in the installation process, and the resistance strain gauge is connected with the computer (8) and used for recording a hole circumferential strain time domain change curve in the installation process; and a computer (8) in which strain parameter processing software is installed, and which is connected with the resistance strain gauge (7) and is used for storing and analyzing the hole circumferential strain parameters.
5. A composite hole interference bushing installation damage detection system according to claim 1, wherein the two strain gauges are perpendicular and parallel to the +45° layering direction of the surface layer of the composite aperture plate (11), respectively.
6. The composite hole intervention bushing installation damage detection system of claim 1, wherein the composite hole intervention process damage acoustic signal monitoring device comprises: The acoustic emission sensor (1) is arranged on the surface of the composite material perforated plate (11) and used for monitoring acoustic signals emitted by damage of the composite material in the installation process; the acoustic signal analyzer (9) is connected with the acoustic emission sensor (1), collects acoustic signals and records various acoustic signal parameters, and is connected with the computer (8) to realize real-time data monitoring and storage; and the computer (8) is connected with the acoustic signal analyzer (9), is provided with acoustic signal processing software and is used for recording various acoustic signal parameters and analyzing the acoustic signal damage detection result in the installation process.
7. The composite hole interference bushing installation damage detection system of claim 1, wherein the installation damage comprehensive assessment device achieves comprehensive assessment of composite hole interference bushing installation damage through multi-dimensional comprehensive analysis of displacement, resistance, strain and acoustic signals.
8. A method of composite hole interference liner installation damage detection implemented using the system of any one of claims 1-6, the method comprising: the adjusting and installing device is used for coaxially installing the core rod (3), the bushing (4) and the composite material opening plate (11); the method comprises the steps of adjusting a sensor, namely, attaching an acoustic emission sensor (1) to a composite material opening plate (11) and connecting an acoustic signal analyzer (9), orthogonally mounting a strain gauge (5) on the peripheral surface of the composite material opening plate (11) and connecting a resistance strain gauge (7), connecting the acoustic signal analyzer (9) and the resistance strain gauge (7) to a computer (8), and debugging analysis recording software to a state to be monitored; setting loading parameters, namely setting loading parameters of the hydraulic loading head (2), and setting displacement and resistance sensors of the hydraulic loading head (2); Loading, installing and collecting data, namely starting a hydraulic loading head (2) and a detection system, and completely penetrating a core rod (3) through a bushing (4) to finish primary bushing installation; And (3) data processing and analysis, wherein displacement and resistance parameters in the bushing installation process are acquired by a hydraulic loading head (2), hole circumferential strain data in the installation process are acquired by a strain acquisition system, and damage data in the installation process are acquired by an acoustic emission system.

Description

Composite material hole interference bushing installation damage detection system and method Technical Field The invention relates to the technical field of composite material hole reinforcement, in particular to a system and a method for detecting mounting damage of a composite material hole interference bushing. Background The installation of metal bushings in the holes of open-cell structures of composite materials has proven to be effective in improving the strength and life of the composite material connection structure, but the application of the method is limited by the fact that the composite materials are prone to hole-periphery damage in the process of interference installation due to poor plasticity and easy damage characteristics. There are a number of methods available for installing metal bushings in composite holes. For example, a composite structure lining reinforcement method (202310958660. X) based on electromagnetic loading that uses electromagnetic loading to complete lining reinforcement of a composite structure enables calculation of composite lining reinforcement process parameters of different structures and sizes for guiding reinforcement of a dynamic cold extruded composite lining structure. In addition, the method and the device (202411227871.7) for testing the dynamic installation parameters of the interference bush based on the Hopkinson pressure bar are also provided, and the method uses the Hopkinson pressure bar to realize the installation of the bush, so that the inertia force in the installation process is avoided, and the accuracy of the detection result is improved. The prior art enables the installation of metal bushings in open cell structures of composite materials and the acquisition of basic installation data. However, aiming at the problem of damage to the composite material in the process of installing the interference bush, no reliable method for realizing damage monitoring and evaluation in the process of installing is available, which severely limits the possibility of the method in practical application. Accordingly, it is desirable to provide a method of detecting damage to a composite hole interference liner installation to address the above-described issues. Disclosure of Invention The invention provides a method for detecting the mounting damage of a composite material hole interference bushing, which aims to solve the problem of the defect of damage monitoring, evaluation and analysis in the process of mounting the bushing by the existing mounting method and technology. The invention relates to a method for detecting the mounting damage of a composite material hole interference bushing, which adopts the following technical scheme that: Interference liner mounting means; the hydraulic loading head is internally provided with a displacement and resistance sensor, and one end of the hydraulic loading head is connected with the core rod; the core rod is in a spindle shape with thick middle and thin two ends, one end of the core rod is clung to the hydraulic loading head, and the other end of the core rod is coaxially arranged with the bushing; A bushing in clearance fit with the hole in the composite perforated plate, the lower surface of the bushing being in contact with the slotted washer; The composite material perforated plate is in clearance fit with the bushing at the perforated position, and the lower surface of the composite material perforated plate is contacted with the slotted washer; The upper surface of the slotted washer is contacted with the composite material slotted plate and the bushing, the lower surface of the slotted washer is contacted with the supporting plate, and the inner hole size of the slotted washer is between the outer diameter and the inner diameter of the bushing so as to realize the supporting function in the installation process and allow the core rod to smoothly pass through; the lower surface of the supporting plate is fixed with the ground, and the upper surface of the supporting plate is contacted with the slotted washer, so that the supporting plate has the function of reserving a space for the core rod to pass through and reducing the high-precision processing cost. Preferably, the composite Kong Kongzhou strain detection device includes: The strain gauge comprises two strain gauges, wherein the strain gauges are adhered to the surfaces of the holes close to the holes of the composite perforated plate in a manner of being perpendicular to and parallel to the +45 DEG layering direction of the surface layer of the composite perforated plate, so that strain monitoring around the holes is realized. The resistance strain gauge is connected with the strain gauge, acquires strain parameters in the installation process, is connected with the computer and is used for recording a hole circumferential strain time domain change curve in the installation process; and the computer is internally provided with strain parameter processi