CN114659685A - Pipeline assembly stress detection method - Google Patents
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- CN114659685A CN114659685A CN202210532375.7A CN202210532375A CN114659685A CN 114659685 A CN114659685 A CN 114659685A CN 202210532375 A CN202210532375 A CN 202210532375A CN 114659685 A CN114659685 A CN 114659685A
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- 238000000034 method Methods 0.000 claims abstract description 31
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- 238000012360 testing method Methods 0.000 claims description 25
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- 238000005286 illumination Methods 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 12
- 230000001678 irradiating effect Effects 0.000 claims description 8
- 239000003822 epoxy resin Substances 0.000 claims description 7
- 229920000647 polyepoxide Polymers 0.000 claims description 7
- 239000003292 glue Substances 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 3
- 238000009864 tensile test Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 5
- 238000007689 inspection Methods 0.000 abstract description 4
- 239000010408 film Substances 0.000 description 100
- 238000002845 discoloration Methods 0.000 description 5
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- OPACMJHTQWVSKW-UHFFFAOYSA-N 2,3,3-Triphenylacrylonitrile Chemical class C=1C=CC=CC=1C(C#N)=C(C=1C=CC=CC=1)C1=CC=CC=C1 OPACMJHTQWVSKW-UHFFFAOYSA-N 0.000 description 1
- BVTJGGGYKAMDBN-UHFFFAOYSA-N Dioxetane Chemical class C1COO1 BVTJGGGYKAMDBN-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 229920006335 epoxy glue Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- PJANXHGTPQOBST-UHFFFAOYSA-N stilbene Chemical class C=1C=CC=CC=1C=CC1=CC=CC=C1 PJANXHGTPQOBST-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The application discloses a pipeline assembly stress detection method, which is characterized by comprising the following steps: obtaining a chromaticity card comprising corresponding colors of the mechanochromic film under different tensile forces through a tensile experiment; fixing the force-induced color-changing film on a pipeline to be tested; and comparing the color of the force-induced color-changing film on the to-be-tested pipeline after assembly with the color on the chromaticity card to obtain the assembly stress on the to-be-tested pipeline. This application is through fixing power photochromic film on waiting to examine the pipeline, through observing and comparing the colour of the power photochromic film on the pipeline that awaits measuring, the tester can be quick judge out the stress after the pipeline assembly that awaits measuring. The technical problems that the traditional method for detecting the stress of the pipeline to be detected is low in speed and complex in detection operation are solved, the inspection personnel can be helped to quickly judge the pipeline installation quality, and the quality problem is avoided.
Description
Technical Field
The application relates to the technical field of stress detection, in particular to a pipeline assembly stress detection method.
Background
Due to factors such as manufacturing errors and assembly errors of pipelines, when the pipelines are assembled, stress exists on the pipelines, the pipe connecting pieces and the fixed clamp, the adverse effects such as reduction of pipeline sealing performance, damage of the clamp and damage of pipeline openings can be caused, the safety and reliability of a pipeline system are threatened, and therefore forced installation is strictly forbidden in pipeline assembly, and stress assembly is carried out. However, since the installer sometimes installs the pipeline forcibly without complying with the assembly requirement, the inspector needs a certain detection means to prevent this phenomenon. The existing detection method is slow in speed and complex in detection operation.
The above is only for the purpose of assisting understanding of the technical solutions of the present application, and does not represent an admission that the above is prior art.
Disclosure of Invention
The application mainly aims to provide a pipeline assembly stress detection method, and aims to solve the technical problems that the existing detection method is low in speed and complex in detection operation.
In order to achieve the above object, the present application provides a method for detecting pipeline assembly stress, the method including:
obtaining a chromaticity card comprising corresponding colors of the mechanochromic film under different tensile forces through a tensile experiment;
fixing the force-induced color-changing film on a pipeline to be tested;
and comparing the color of the force-induced color-changing film on the to-be-tested pipeline after assembly with the color on the chromaticity card to obtain the assembly stress on the to-be-tested pipeline.
Optionally, the step of obtaining a chromaticity card including colors corresponding to the mechanochromic film under different tensile forces through a tensile test includes:
under the condition of illumination, recording the corresponding colors of the mechanochromic film under different tensile forces;
under the dark condition, using an ultraviolet lamp to irradiate the force-induced color-changing film, and recording the corresponding fluorescent colors of the force-induced color-changing film under different tensile forces;
obtaining the chromaticity card based on the color and the fluorescence color.
Optionally, the step of obtaining the assembly stress on the to-be-tested pipeline by comparing the color of the force-induced color-changing film on the to-be-tested pipeline after assembly with the color on the chromaticity card includes:
when the assembled pipeline to be tested is positioned in an illumination environment, comparing the color of the force-induced color-changing film on the assembled pipeline to be tested with the color recorded by the chromaticity card under the illumination condition to obtain the assembly stress on the pipeline to be tested;
when the assembled pipeline to be tested is located in a dark environment, an ultraviolet lamp is used for irradiating the assembled pipeline to be tested, the fluorescence color of the force-induced color-changing film on the assembled pipeline to be tested is compared with the fluorescence color recorded by the chromaticity card under the dark condition, and the assembling stress on the pipeline to be tested is obtained.
Optionally, the step of recording the corresponding colors of the mechanochromic film under different tensile forces in the presence of light comprises:
fixing the force-induced color-changing film on a metal test piece;
pulling the metal test piece fixed with the mechanochromic film;
and photographing and recording the color of the force-induced color-changing film on the metal test piece pulled under different tensile forces.
Optionally, the step of recording the corresponding fluorescence colors of the mechanochromic film under different pulling forces by irradiating the mechanochromic film with an ultraviolet lamp under dark conditions comprises:
fixing the force-induced color-changing film on a metal test piece;
pulling the metal test piece fixed with the mechanochromic film;
and irradiating the force-induced color-changing film fixed on the metal test piece by using an ultraviolet lamp, photographing and recording the color of the stretched force-induced color-changing film on the metal test piece under different tensile forces.
Optionally, the step of fixing the force-induced color-changing film on the pipeline to be tested includes:
and adhering the force-induced color-changing film to the pipeline to be detected by using epoxy resin glue.
Optionally, the material of the mechanochromic film is a covalently linked mechanochromic material.
Optionally, the step of fixing the force-induced color-changing film on the pipeline to be tested includes:
and fixing the mechanochromic film at the stress concentration position of the pipeline to be detected.
Optionally, the step of fixing the mechanochromic membrane at a stress concentration position of the pipeline to be tested includes:
and fixing a plurality of force-induced color-changing film blocks at intervals along the outer circumference of the stress concentration position of the pipeline to be tested.
Optionally, the step of fixing a plurality of force-induced color-changing thin film blocks at intervals along the outer circumference of the stress concentration position of the pipeline to be tested includes:
and a plurality of force-induced color-changing film blocks are uniformly fixed at intervals along the outer circumference of the stress concentration position of the pipeline to be tested.
The beneficial effect that this application can realize:
this application is through fixing the power photochromic film at the pipeline that awaits measuring, the in-process of the pipeline that awaits measuring of assembly, when the pipeline that awaits measuring receives stress, the power photochromic film also can receive the same stress, through the colour of the power photochromic film on observing the pipeline that awaits measuring, the colour that the power photochromic film on the pipeline that awaits measuring compares with the colour on the colourity card, can know the stress on the pipeline that awaits measuring this moment, the inspector can be quick judge the stress after the pipeline that awaits measuring assembles. The method is simple to operate, the detection speed and the detection efficiency are improved, the method is used for detecting the pipeline assembly stress, and inspectors do not need to loosen the installed pipeline to judge whether the stress exists or not, so that repeated labor is avoided, and no missing detection exists; meanwhile, during field detection, a sensor does not need to be installed temporarily and electronic equipment does not need to be used, convenience and rapidness are achieved, inspection personnel can be helped to judge the pipeline installation quality quickly, and quality problems are avoided.
According to the pipeline assembly stress detection method provided by the embodiment of the application, the force-induced color-changing film is fixed on the pipeline to be detected, the technical problems that the existing detection method for detecting the pipeline to be detected is low in speed and complex in detection operation are solved, the inspection personnel can be helped to quickly judge the pipeline installation quality, and the quality problem is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of a pipeline to be tested according to the present application;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is a schematic structural diagram of a second embodiment of a pipeline to be tested according to the present application;
FIG. 4 is a cross-sectional view of FIG. 3;
FIG. 5 is a schematic structural diagram of a third embodiment of a pipeline to be tested according to the present application;
FIG. 6 is a cross-sectional view of FIG. 5;
reference numerals: 1-pipeline, 2-force color changing film and 3-epoxy resin glue.
The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The application relates to a method for detecting pipeline assembly stress, and a first embodiment provides a method for detecting pipeline assembly stress, wherein the method comprises the following steps:
obtaining a chromaticity card comprising corresponding colors of the mechanochromic film under different tensile forces through a tensile experiment;
fixing the force-induced color-changing film on a pipeline to be tested;
and comparing the color of the force-induced color-changing film on the to-be-tested pipeline after assembly with the color on the chromaticity card to obtain the assembly stress on the to-be-tested pipeline.
The color of the mechanochromic film is recorded under different tension, the color of the mechanochromic film can be different under different tension, the mechanochromic film is the prior art, the mechanochromic film is made of a mechanochromic material, the color (light wavelength) of the mechanochromic film has positive correlation with the stress, and the color of the mechanochromic film under different tension is recorded; through fixing the power discoloration film at the pipeline that awaits measuring, the in-process of the pipeline that awaits measuring of assembly, when the pipeline receives the stress, the power discoloration film also can receive the same stress, through the colour of observing the power discoloration film on the pipeline that awaits measuring, the colour of the power discoloration film on the pipeline that awaits measuring and the corresponding colour of the power discoloration film of record under different pulling forces are compared, compare with the colour of record on the colourity card promptly, find the colour the same with the colour of record, because there is corresponding pulling force with it under the colour of record, thereby can know the stress on the pipeline that awaits measuring this moment, the inspector can be quick the stress of judging the pipeline that awaits measuring after assembling. The method is simple to operate, during detection, only the color of the force-induced color-changing film on the pipeline to be detected is compared with the recorded color, the detection steps are simple, the detection speed and the detection efficiency are improved, the method is used for detecting the pipeline assembly stress, and inspectors do not need to loosen the installed pipeline to judge whether the stress exists or not, so that repeated labor is avoided, and missing detection does not exist; meanwhile, during field detection, a sensor does not need to be temporarily installed and electronic equipment does not need to be used, and convenience and rapidness are realized. By the method, inspection personnel can be helped to quickly judge the pipeline installation quality, and quality problems are avoided.
The step of obtaining the chromaticity card comprising colors corresponding to the mechanochromic film under different tensile forces through a tensile test comprises:
under the condition of illumination, recording the corresponding colors of the mechanochromic film under different tensile forces;
under the dark condition, using an ultraviolet lamp to irradiate the force-induced color-changing film, and recording the corresponding fluorescent colors of the force-induced color-changing film under different tensile forces;
obtaining the chromaticity card based on the color and the fluorescence color.
The method comprises the steps of respectively recording corresponding colors of the force-induced color-changing film under different tension forces under the condition of illumination and the dark condition, and directly recording corresponding colors of the force-induced color-changing film under different tension forces under the condition of illumination; according to the characteristics of the mechanochromic film, in order to improve the accuracy of stress detection under a dark condition, the invention uses an ultraviolet lamp to irradiate the mechanochromic film under the dark condition, and records the corresponding fluorescent colors of the mechanochromic film under different tensile forces, so that the detection result is more accurate. The chromaticity card is obtained based on the color recorded under the condition of illumination and the fluorescence color recorded under the condition of darkness, so that the comparison can be conveniently carried out by detection personnel at any time, the method for detecting the stress on the pipeline to be detected is greatly simplified, and the detection efficiency is improved.
The step of obtaining the assembly stress on the pipeline to be tested by comparing the color of the force-induced color-changing film on the pipeline to be tested after assembly with the color on the chromaticity card comprises the following steps:
when the assembled pipeline to be tested is positioned in an illumination environment, comparing the color of the force-induced color-changing film on the assembled pipeline to be tested with the color recorded by the chromaticity card under the illumination condition to obtain the assembly stress on the pipeline to be tested;
when the assembled pipeline to be tested is located in a dark environment, an ultraviolet lamp is used for irradiating the assembled pipeline to be tested, the fluorescence color of the force-induced color-changing film on the assembled pipeline to be tested is compared with the fluorescence color recorded by the chromaticity card under the dark condition, and the assembling stress on the pipeline to be tested is obtained.
When the pipeline to be measured is in an illumination environment, comparing the color with the recorded corresponding colors of the mechanochromic film under different tensions under the illumination condition; when the pipeline that awaits measuring is in the dark surrounds, with the ultraviolet lamp shine the pipeline that awaits measuring after the assembly, compare with the fluorescent color that the power of record under the condition of dark changes color film and correspond under different pulling forces for the testing result is more accurate, makes various testing environment homoenergetic obtain accurate detection.
There are many methods for recording the corresponding color of the mechanochromic film under different tension, for example, the method comprises the steps of pulling the mechanochromic film through a pulling device, observing the color of the mechanochromic film, selecting the color which is consistent with that of the mechanochromic film on a chromaticity card, recording the color under the tension, and repeating the steps to record the corresponding color under different tension. Specifically, in this embodiment, the step of recording the corresponding colors of the mechanochromic film under different tensile forces in the presence of light includes:
fixing the force-induced color-changing film on a metal test piece;
pulling the metal test piece fixed with the mechanochromic film;
and photographing and recording the color of the force-induced color-changing film on the metal test piece pulled under different tensile forces.
The color of the force-induced color-changing film at different pulling forces is tested by the experiment method for pulling the metal experiment sheet, the corresponding colors under different pulling forces and different pulling forces are made into the chromaticity card, and the stress on the pipeline can be rapidly detected by a detector conveniently.
Similarly, the step of recording the corresponding fluorescence colors of the mechanochromic film under different tensile forces by irradiating the mechanochromic film with an ultraviolet lamp under dark conditions comprises:
fixing the force-induced color-changing film on a metal test piece;
pulling the metal test piece fixed with the mechanochromic film;
and irradiating the force-induced color-changing film fixed on the metal test piece by using an ultraviolet lamp, photographing and recording the color of the stretched force-induced color-changing film on the metal test piece under different tensile forces.
Under illumination and dark condition, record the colour under the illumination condition and the fluorescence colour of dark condition respectively, when the detection ring border is located there is the illumination condition, use the colour of record under the illumination condition, when the detection ring border is located the dark condition, use the fluorescence colour of record under the dark condition for the testing result is more accurate.
Epoxy glue's effect will power discolour film fixes on the pipeline, for example through screw bolt fixed, the buckle is fixed, still for example through the viscose fixed etc. in this embodiment, will power discolour film fixes the step on the pipeline that awaits measuring, include: and adhering the force-induced color-changing film to the pipeline to be detected by using epoxy resin glue. The epoxy resin adhesive is an existing known material, and the force-induced color-changing film is fixed on the pipeline through the epoxy resin adhesive, so that the force-induced color-changing film can be tightly fixed on the pipeline, and stress applied to the pipeline can accurately react on the force-induced color-changing film.
The material of the mechanochromic film is a covalent connection type mechanochromic material. The color (light wavelength) of the mechanochromic material has a positive correlation with the magnitude of the stress, and in order to improve the sensitivity, the present embodiment adopts a covalent bonding type mechanochromic material. Force-responsive functional groups include, but are not limited to, spiropyrans, 1, 2-dioxetanes, triphenylacrylonitrile derivatives, cyano-substituted stilbene derivatives, helical conformation polyphenylacetylene, and the like, characterized by a ring or conformation containing labile chemical bonds, greater ring tension, and the like, susceptible to transformation. Polymeric substrates include, but are not limited to, polyurethanes, polyamides, polyesters. The polymer substrate can transmit tensile external force to the covalently-connected force-responsive functional group to induce the covalent-connected force-responsive functional group to generate chemical bond fracture, change the stacking mode of molecules or induce the local rotation of the molecules, thereby realizing optical change.
The method for distributing the mechanochromic film on the pipeline to be tested has various ways, such as overall covering, partial covering and the like, in this embodiment, the step of fixing the mechanochromic film on the pipeline to be tested includes: and fixing the mechanochromic film at the stress concentration position of the pipeline to be detected. The force-induced color-changing film is fixed at the stress concentration position of the pipeline to be detected, so that the stress condition of the assembled pipeline to be detected can be accurately reflected by the force-induced color-changing film, and the assembly stress of the pipeline to be detected can be detected. As shown in fig. 5 and 6, the force-induced color-changing film covers the outer ring of the pipeline for a circle, and the force-induced color-changing film is bonded to the outer ring of the pipeline for a circle through epoxy resin glue in the embodiment, so that the outer ring of the pipeline can be detected, and the accuracy of the detection result is improved.
In order to save materials of the mechanochromic film and simultaneously consider the accuracy of detection results. The step of fixing the mechanochromic film at the stress concentration position of the pipeline to be tested comprises the following steps: and fixing a plurality of force-induced color-changing film blocks at intervals along the outer circumference of the stress concentration position of the pipeline to be tested.
The step of fixing a plurality of force-induced color-changing film blocks at intervals along the outer circumference of the stress concentration position of the pipeline to be tested comprises the following steps: and a plurality of force-induced color-changing film blocks are uniformly fixed at intervals along the outer circumference of the stress concentration position of the pipeline to be tested. In order to save materials of the force-induced color-changing film and ensure the accuracy of detection results, a plurality of force-induced color-changing film blocks are uniformly fixed at intervals along the outer circumference of the stress concentration position of the pipeline to be detected. As shown in fig. 1-4, 4 force-induced color-changing films are uniformly distributed on the circumference of the outer ring of the pipeline in fig. 1 and 2, and 3 force-induced color-changing films are uniformly distributed on the circumference of the outer ring of the pipeline in fig. 3 and 4.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.
Claims (10)
1. A method for detecting pipeline assembly stress, the method comprising:
obtaining a chromaticity card comprising corresponding colors of the mechanochromic film under different tensile forces through a tensile experiment;
fixing the force-induced color-changing film on a pipeline to be tested;
and comparing the color of the force-induced color-changing film on the to-be-tested pipeline after assembly with the color on the chromaticity card to obtain the assembly stress on the to-be-tested pipeline.
2. The method of claim 1, wherein the testing of the assembly stress of the pipeline,
the step of obtaining the chromaticity card comprising colors corresponding to the mechanochromic film under different tensile forces through a tensile test comprises:
under the condition of illumination, recording the corresponding colors of the mechanochromic film under different tensile forces;
under the dark condition, using an ultraviolet lamp to irradiate the force-induced color-changing film, and recording the corresponding fluorescent colors of the force-induced color-changing film under different tensile forces;
obtaining the chromaticity card based on the color and the fluorescence color.
3. The method for detecting the assembling stress of the pipeline according to claim 2, wherein the step of obtaining the assembling stress on the pipeline to be tested by comparing the color of the mechanochromic film on the assembled pipeline to the color on the color card comprises:
when the assembled pipeline to be tested is positioned in an illumination environment, comparing the color of the force-induced color-changing film on the assembled pipeline to be tested with the color recorded by the chromaticity card under the illumination condition to obtain the assembly stress on the pipeline to be tested;
when the assembled pipeline to be tested is located in a dark environment, an ultraviolet lamp is used for irradiating the assembled pipeline to be tested, the fluorescence color of the force-induced color-changing film on the assembled pipeline to be tested is compared with the fluorescence color recorded by the chromaticity card under the dark condition, and the assembling stress on the pipeline to be tested is obtained.
4. The method for detecting the assembling stress of the pipeline as claimed in claim 2, wherein the step of recording the corresponding colors of the mechanochromic film under different tensile forces in the presence of light comprises:
fixing the force-induced color-changing film on a metal test piece;
pulling the metal test piece fixed with the mechanochromic film;
and photographing and recording the color of the force-induced color-changing film on the metal test piece pulled under different tensile forces.
5. The method for detecting pipeline assembly stress as claimed in claim 2, wherein the step of using an ultraviolet lamp to irradiate the mechanochromic film under dark conditions and recording the corresponding fluorescence colors of the mechanochromic film under different pulling forces comprises:
fixing the force-induced color-changing film on a metal test piece;
pulling the metal test piece fixed with the mechanochromic film;
and irradiating the force-induced color-changing film fixed on the metal test piece by using an ultraviolet lamp, photographing and recording the color of the stretched force-induced color-changing film on the metal test piece under different tensile forces.
6. The method for detecting the assembling stress of the pipeline according to claim 1, wherein the step of fixing the mechanochromic film on the pipeline to be detected comprises the following steps:
and adhering the force-induced color-changing film to the pipeline to be detected by using epoxy resin glue.
7. The method for detecting the assembling stress of the pipeline as claimed in claim 1, wherein the material of the mechanochromic film is a covalent bonding type mechanochromic material.
8. The method for detecting pipeline assembling stress as claimed in claim 1, wherein the step of fixing the mechanochromic membrane to the pipeline to be tested comprises:
and fixing the force-induced color-changing film at the stress concentration position of the pipeline to be detected.
9. The method for detecting pipeline assembling stress as claimed in claim 8, wherein the step of fixing the mechanochromic membrane at the stress concentration position of the pipeline to be detected comprises:
and fixing a plurality of force-induced color-changing film blocks at intervals along the outer circumference of the stress concentration position of the pipeline to be tested.
10. The method for detecting pipeline assembling stress as claimed in claim 9, wherein the step of fixing a plurality of mechanochromic film blocks at intervals along the outer circumference of the stress concentration position of the pipeline to be detected comprises:
and a plurality of force-induced color-changing film blocks are uniformly fixed at intervals along the outer circumference of the stress concentration position of the pipeline to be tested.
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| CN202210532375.7A CN114659685A (en) | 2022-05-17 | 2022-05-17 | Pipeline assembly stress detection method |
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