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Method for evaluating bonding strength of mechanical composite tube

A technology that combines strength and evaluation methods. It is applied in the direction of strength characteristics, using repeated force/pulsation force to test material strength, and using stable tension/pressure to test material strength. It can solve the problems of inability to detect online, large detection errors, and damage In order to reduce the cost of inspection, the detection error is small, and the results are reliable.

Active Publication Date: 2012-06-20
XIAN SUNWARD AEROSPACE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for evaluating the bonding strength of mechanical composite pipes, which solves the problems of destructive detection in existing methods, large detection errors, high cost, low efficiency and inability to detect online

Method used

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  • Method for evaluating bonding strength of mechanical composite tube
  • Method for evaluating bonding strength of mechanical composite tube
  • Method for evaluating bonding strength of mechanical composite tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The method for evaluating the bonding strength of mechanical composite pipes includes the following steps:

[0046] Step 1. Select the standard mechanical composite pipe whose bonding strength meets the evaluation requirements and has the same material and specifications as the mechanical composite pipe to be tested, that is, the selected standard mechanical composite pipe to be tested. Equal wall thickness and equal length.

[0047] The specific selection method of the standard mechanical composite pipe is as follows:

[0048] Step 1.1, assemble the base pipe and liner coaxially with the material, outer diameter, wall thickness and length of the composite pipe to be tested to obtain the mechanical composite pipe before standardization;

[0049] Step 1.2, standardization processing

[0050] Step 1.2.1, initial loading

[0051] Install sealing devices at both ends of the composite pipe obtained in step 1.1, and attach axial strain gauges and hoop strain gauges at the ...

Embodiment 2

[0069] In this embodiment, the modal parameter used to detect and evaluate the bonding strength of the composite pipe is damping ξ. In step 2, after analyzing the frequency response of the acceleration signal and the force signal, the damping ξ of the standard mechanical composite tube is obtained 标准 . In step 3, after performing frequency response analysis on the acceleration signal and force signal of the mechanical composite pipe to be tested, the damping ξ of the mechanical composite pipe to be tested is obtained 待测 , other step methods of step 1 to step 3 are all the same as in embodiment 1.

[0070] In step 4, compare the damping ξ of the mechanical composite tube to be tested obtained in step 3 with the damping ξ of the standard mechanical composite tube obtained in step 2 标准 For comparison, when ξ 待测 ≤ξ 标准 , the bonding strength of the mechanical composite pipe to be tested is qualified, otherwise, the bonding strength of the mechanical composite pipe to be tested ...

Embodiment 3

[0103] In this embodiment, the modal parameter used to detect and evaluate the bonding strength of the composite pipe is the transmissibility η. The step method of step 1 is identical with embodiment 1.

[0104] Step 2. Apply excitation to the mechanical composite pipe of the standard part obtained in step 1 in a certain way, record the excitation force signal, collect the acceleration signal of a specific point of the mechanical composite pipe of the standard part in real time, analyze and process the obtained signal, and obtain the standard Transmissibility η of a piece of mechanical composite pipe 标准 .

[0105] The specific method of step 2 is: place the standard mechanical composite pipe with a length of 1 obtained in step 1 horizontally on two V-shaped grooves, adjust the positions of the two V-shaped grooves so that the two V-shaped grooves support parts The outer end faces are vertically aligned with the two outer end faces of the composite pipe.

[0106] Arrange No....

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Abstract

The invention discloses a method for evaluating the bonding strength of a mechanical composite tube. The method comprises the following steps: 1, selecting a standard component mechanical composite tube; 2, applying excitation onto the standard component mechanical composite tube, recording the exciting force signal, acquiring acceleration signals in a real time mode, and carrying out analytic processing to obtain the value of a modal parameter of the standard component mechanical composite tube; 3, applying same excitation onto the mechanical composite tube to be tested, and acquiring the acceleration signals of corresponding points in a real time mode, and carrying out analytic processing to obtain the value of a same modal parameter of the mechanical composite tube to be tested; and 4, comparing the two values of the modal parameter, and determining whether the bonding strength of the mechanical composite tube to be tested is qualified according to the comparison result. The method solves problems of large detection error, high cost, low efficiency and online detection unableness of destructive detection needed by present methods.

Description

technical field [0001] The invention belongs to the technical field of mechanical performance detection, and in particular relates to an evaluation method for the bonding strength of a mechanical composite pipe. Background technique [0002] The mechanical composite pipe uses the relative deformation of the liner and the base pipe to combine the liner and the base pipe. There is no metallurgical bonding interface between the liner and the base pipe. The combination of the liner and the base pipe mainly depends on the Therefore, the quality of the bonding strength directly determines the use environment of the mechanical composite pipe. [0003] The indicators currently used to evaluate the bonding strength of mechanical composite pipes include axial shear separation strength and radial clamping force. Among them, the axial shear separation strength refers to the interface shear stress in the axial direction when the base pipe and the liner slide relative to each other under...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/09
CPCG01N3/32G01N3/12G01N2203/0218G01M7/00
Inventor 张燕飞魏帆郭崇晓王永芳王小艳
Owner XIAN SUNWARD AEROSPACE MATERIAL CO LTD
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