CN111948288A - Ultrasonic detection method and device for laser shock delamination defect - Google Patents
Ultrasonic detection method and device for laser shock delamination defect Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 120
- 230000007547 defect Effects 0.000 title claims abstract description 77
- 230000035939 shock Effects 0.000 title claims description 36
- 230000032798 delamination Effects 0.000 title claims description 19
- 239000002131 composite material Substances 0.000 claims abstract description 206
- 238000012360 testing method Methods 0.000 claims description 37
- 239000000463 material Substances 0.000 claims description 34
- 230000008878 coupling Effects 0.000 claims description 13
- 238000010168 coupling process Methods 0.000 claims description 13
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- 238000004519 manufacturing process Methods 0.000 description 5
- 238000004901 spalling Methods 0.000 description 5
- 238000002604 ultrasonography Methods 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 3
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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- 239000003822 epoxy resin Substances 0.000 description 1
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/045—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
- G01N29/046—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks using the echo of particles imparting on a surface; using acoustic emission of particles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
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Abstract
The invention provides an ultrasonic detection method and a device for laser impact spallation defects, which are characterized in that an ultrasonic signal initial value is obtained by carrying out ultrasonic detection on a composite material, a characteristic value of an ultrasonic signal is obtained after the composite material is subjected to laser impact, whether the characteristic value of the ultrasonic signal is equal to the ultrasonic signal initial value is judged, when the characteristic value of the ultrasonic signal is equal to the ultrasonic signal initial value, the laser impact power is increased for carrying out impact and ultrasonic detection until the characteristic value of the ultrasonic signal, which is measured by the composite material after the current impact, is not equal to the ultrasonic signal initial value, the laser impact power and the ultrasonic detection are continuously increased until the characteristic value of the ultrasonic signal, which is measured by the composite material after the current impact, is the same as the characteristic value of the ultrasonic signal, which is measured by the composite material after the next impact, and; and acquiring the bonding strength of the composite material according to the laser impact power of the composite material impacted at the next time, thereby realizing the detection from the defect occurrence of the bonding interface to the debonding process.
Description
Technical Field
The invention belongs to the field of performance detection of composite materials, and particularly relates to an ultrasonic detection method and device for laser shock delamination defects.
Background
Currently, industrial components and parts generally comprise composite material elements formed by bonding, so as to meet various functions of protection, strength increase, bipolar formation and the like. For example, the paint coating of the airplane is bonded with the material of the airplane wing through bonding force, and the semiconductor of the chip material is bonded with the base material such as copper and aluminum through epoxy resin. The interface bonding strength defect of the composite material is always a difficult point for detection, and indirectly influences the service life and the stable performance of parts. At present, the method for detecting the interface bonding quality usually mainly measures the bonding force, has the defects of difficult operation and great discreteness, and cannot realize real-time measurement. The method has the defects that because the bonding force is directly measured, when the contact type tension measurement is adopted, the surface bonding is required to be carried out on the sample, so that a larger load effect is introduced, the accuracy of the measurement result is not high, and the position and the form of the interface bonding defect cannot be obtained. On the other hand, there is a method of directly performing measurement by using ultrasound, which can usually detect the existing defects of the interface, but cannot detect the potential defects of the bonding interface of the material or the defects in a critical state, and the defects can only be shown due to vibration, impact and the like in the using process, but cannot be detected by using the currently common ultrasonic nondestructive detection.
In the prior art, the technical problem that potential defects or defects in a critical state cannot be detected exists in an adhesion interface of a composite material.
Disclosure of Invention
The invention provides an ultrasonic detection method for a laser shock spalling defect, which solves the technical problem that the potential defect of a bonding interface of a composite material or the defect in a critical state can not be detected in the prior art.
The embodiment of the invention provides an ultrasonic detection method for a laser shock delamination defect, which comprises the following steps:
s1: carrying out ultrasonic detection on the composite material to obtain an initial value of an ultrasonic signal;
s2: carrying out laser impact on the composite material to obtain the impacted composite material;
s3: carrying out ultrasonic detection on the impacted composite material to obtain an ultrasonic signal characteristic value;
s4: judging whether the ultrasonic signal characteristic value is equal to the ultrasonic signal initial value or not;
s5: when the ultrasonic signal characteristic value is not equal to the ultrasonic signal initial value, acquiring the power of the current laser impact, acquiring the bonding strength of the composite material starting to be debonded according to the power of the current laser impact, and executing S7;
s6: when the ultrasonic signal characteristic value is equal to the ultrasonic signal initial value, repeating the execution of S2-S6 and increasing the power of the laser shock in S2;
s7: repeatedly executing S2-S3, increasing the power of the laser impact in S2, and judging whether the ultrasonic signal characteristic value measured by the composite material after the previous impact is the same as the ultrasonic signal characteristic value measured by the composite material after the next impact;
s8: when the ultrasonic signal characteristic value measured by the composite material after the previous impact is different from the ultrasonic signal characteristic value measured by the composite material after the next impact, the step S7 is repeatedly executed;
s9: when the ultrasonic signal characteristic value measured by the composite material after the current impact is the same as the ultrasonic signal characteristic value measured by the composite material after the next impact, the laser impact power of the composite material after the next impact is obtained;
s10: and acquiring the bonding strength of the composite material according to the laser impact power of the composite material impacted at the last time.
Preferably, the setting of the power of the laser shock in S2 specifically includes:
when the composite material is a known material, the impact is started by setting the power of the laser impact at the lower limit of the qualified threshold value of the adhesive strength of the known material according to the adhesive strength of the known material.
Preferably, the setting of the power of the laser shock in S2 specifically includes:
and when the composite material is a workpiece made of a new material, the composite material is impacted according to a preset initial value serving as the power of laser impact.
Preferably, between S1 and S2, further comprising:
s101: judging whether the initial value of the ultrasonic signal is within a preset threshold range;
s102: when the initial value of the ultrasonic signal is not within the preset threshold range, determining the quality of the composite material;
s103: when the initial value of the ultrasonic signal is within the preset threshold range, S2 is executed.
Preferably, the ultrasonic detection method further comprises:
s11: and detecting the composite material according to the phased array to obtain the defect shape and the defect position of the composite material.
Preferably, the ultrasonic detection method further comprises:
s12: and generating a bonding strength performance curve of the composite material according to the power of each laser impact, the initial value of the ultrasonic signal and the characteristic value of each ultrasonic signal.
Preferably, the initial value of the ultrasonic signal and the characteristic value of the ultrasonic signal both comprise amplitude and harmonic time.
The embodiment of the invention also provides an ultrasonic detection device for the laser impact spalling defect, which comprises a composite material clamp, a comprehensive test system, a laser impact system and an ultrasonic detection system,
the comprehensive test system is electrically connected with the laser impact system and the ultrasonic detection system;
the composite material clamp is used for clamping a composite material;
the comprehensive test system is used for sending signals to the laser impact system and the ultrasonic detection system according to the ultrasonic detection method of the laser impact spallation defect and processing received data sent back by the ultrasonic detection system;
the laser impact system is used for carrying out laser impact on the composite material according to the received signal sent by the comprehensive test system;
the ultrasonic detection system is used for carrying out ultrasonic detection on the composite material according to the received signal sent by the comprehensive test system and sending the detected data back to the comprehensive test system.
Preferably, the ultrasonic detection device further comprises an XY stage and an XY stage controller;
the ultrasonic detection system comprises an ultrasonic detection controller and a phased array ultrasonic transducer which are electrically connected with each other;
the XY platform controller and the ultrasonic detection controller are both electrically connected with the comprehensive test system;
the laser impact system is arranged above the composite material;
the phased array ultrasonic transducer is arranged on the XY platform, and the XY platform controller is used for controlling the XY platform to move up and down so as to enable the phased array ultrasonic transducer to be tightly attached to the top surface or the bottom surface of the composite material;
the phased array ultrasonic transducer is used for carrying out ultrasonic detection on the composite material;
the ultrasonic detection controller is electrically connected with the phased array ultrasonic transducer and is used for controlling the phased array ultrasonic transducer to carry out ultrasonic detection on the composite material.
Preferably, the laser impact system comprises a laser controller and a laser source which are electrically connected with each other, and the laser controller is electrically connected with the comprehensive test system and is used for controlling the laser source to impact the composite material;
a force sensor is arranged on the XY platform and used for detecting the attaching force of the phased array ultrasonic transducer and the composite material;
the working surface of the phased array ultrasonic transducer is provided with a coupling material, and the coupling material is used for removing air so that the phased array ultrasonic transducer is attached to the bottom surface or the top surface of the composite material.
According to the technical scheme, the invention has the following advantages:
the invention provides an ultrasonic detection method of laser impact spalling defect, which comprises the steps of carrying out ultrasonic detection on a composite material to obtain an initial value of an ultrasonic signal, carrying out laser impact on the composite material to obtain a characteristic value of the ultrasonic signal, judging whether the characteristic value of the ultrasonic signal is equal to the initial value of the ultrasonic signal or not to know whether the composite material has defects or not, increasing the power of laser impact to carry out impact and ultrasonic detection when the characteristic value of the ultrasonic signal is equal to the initial value of the ultrasonic signal, namely, the composite material starts to have defects, obtaining the bonding strength of the composite material which starts to be debonded by obtaining the power of the current laser impact, continuing increasing the impact power of the laser and the ultrasonic detection until the characteristic value of the ultrasonic signal measured by the composite material after the current impact is the same as the characteristic value of the ultrasonic signal measured by the composite material after the next impact, namely, the composite material is completely debonded at the moment, and the laser impact power of the composite material at the next time is obtained; and acquiring laser power as the bonding strength for starting debonding when the debonding signal characteristic value is found for the first time, and taking the power strength of the later impact as the bonding strength for complete debonding, so that the detection of the whole process from the occurrence of the defect of the bonding interface to the complete debonding is realized. And further solve the technical problem that the potential defect of the bonding interface of the composite material or the defect in a critical state can not be detected in the prior art.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a flowchart of an ultrasonic detection method for a laser shock delamination defect according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a transmission-type structure of an ultrasonic detection apparatus for laser shock delamination defect according to a second embodiment of the present invention;
fig. 3 is a schematic view of a reflective structure of an ultrasonic detection apparatus for laser shock delamination defect according to a second embodiment of the present invention.
Reference is made to the following in corresponding reference numbers in the drawings of the specification:
1. a composite material clamp; 2. a laser source; 3. a laser controller; 4. a phased array ultrasound transducer; 41. a coupling material; 5. an ultrasonic detection controller; 6. a force sensor; 7. an XY stage; 8. an XY stage controller; 9. and (4) a comprehensive test system.
Detailed Description
The embodiment of the invention provides an ultrasonic detection method and device for a laser shock spalling defect, which are used for solving the technical problem that the potential defect of a bonding interface of a composite material or the defect in a critical state can not be detected in the prior art.
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1, an ultrasonic detection method for a laser shock delamination defect according to an embodiment of the present invention includes the following steps:
s1: carrying out ultrasonic detection on the composite material to obtain an initial value of an ultrasonic signal;
the composite material comprises a first composite material and a second composite material, wherein the first composite material and the second composite material respectively represent adhesion of different materials, the first composite material and the second composite material are adhered, and the adhesion layer is an adhesion interface.
The composite material is initially detected through ultrasonic detection, and an initial ultrasonic signal value is obtained, wherein the initial ultrasonic signal value comprises signal characteristic values such as amplitude and sound time, the amplitude is the maximum amplitude of the sound wave propagation effective direct wave, and the sound time is the propagation travel time of the sound wave propagation effective direct wave.
Wherein the content of the first and second substances,
s101: judging whether the initial value of the ultrasonic signal is within a preset threshold range;
s102: when the initial value of the ultrasonic signal is not within the preset threshold range, determining the quality of the composite material;
s103: when the initial value of the ultrasonic signal is within the preset threshold range, S2 is executed.
Wherein the preset threshold range refers to a qualified range of ultrasonic detection required by composite material manufacturing or a qualified range of ultrasonic detection of a composite material manufacturing standard; the ultrasonic detection method comprises the steps of judging whether an initial value of an ultrasonic signal is within a preset threshold range or not so as to determine whether the composite material meets the manufacturing requirements of the composite material before the following ultrasonic detection, and when the initial value of the ultrasonic signal is not within the preset threshold range, namely, a defect already occurs in the composite material, the composite material can be directly qualified as an unqualified product, the following ultrasonic detection is not needed for the unqualified product, and the defect shape and the defect position of the composite material can be directly obtained by a phased array method and the like. When the initial value of the ultrasonic signal is within the preset threshold value range, namely the composite material meets the requirement of manufacturing, the ultrasonic detection can be continued.
S2: carrying out laser impact on the composite material to obtain the impacted composite material;
when the composite material is a known material, the laser impact power is set at a power corresponding to the lower limit of the qualified threshold value of the known material bonding strength according to the bonding strength of the known material, and the impact is started. When the composite material which is known to be used for laser impact particularly after a period of time is used, the power corresponding to the lower limit of the qualified threshold of the bonding strength of the known material is selected to start the impact, so that the composite material can generate defects as soon as possible, the frequency of laser impact is reduced, and energy is saved. And when the composite material is a workpiece made of a new material, the composite material is impacted according to a preset initial value serving as the power of laser impact. That is, when the bonding strength of the workpiece made of the new material is not clear, a small preset initial value is set as the power of laser impact to prevent the composite material from being impacted to the stage of debonding from the beginning.
S3: carrying out ultrasonic detection on the impacted composite material to obtain an ultrasonic signal characteristic value;
the ultrasonic signal characteristic values comprise amplitude, harmonic time and the like characteristic values.
S4: judging whether the ultrasonic signal characteristic value is equal to the ultrasonic signal initial value or not;
when the composite material has or has defects, the ultrasonic detection is carried out on the composite material, the obtained ultrasonic signal characteristic value can change, and therefore the change conditions of the bonding condition and the defects in the composite material can be detected by carrying out the ultrasonic detection on the composite material. In general, defects occur in the composite material when the ultrasonic signal characteristic value is not equal to the initial ultrasonic signal value. And determining whether the composite material is changed after being impacted by the laser, namely whether the composite material has defects or not by judging whether the characteristic value of the ultrasonic signal is equal to the initial value of the ultrasonic signal or not.
S5: when the ultrasonic signal characteristic value is not equal to the ultrasonic signal initial value, acquiring the power of the current laser impact, acquiring the bonding strength of the composite material starting to be debonded according to the power of the current laser impact, and executing S7;
when the ultrasonic signal characteristic value is not equal to the initial value of the ultrasonic signal, namely the composite material begins to have defects, the bonding strength of the composite material, in which the defects begin to appear, can be obtained according to the power of laser impact at the moment. Execution continues with S7. And acquiring the power of the current laser impact and acquiring the bonding strength of the composite material starting to be debonded according to the power of the current laser impact.
S6: when the ultrasonic signal characteristic value is equal to the ultrasonic signal initial value, repeating the execution of S2-S6 and increasing the power of the laser shock in S2;
when the ultrasonic signal characteristic value is equal to the initial value of the ultrasonic signal, the composite material has no defect, namely the composite material is determined to be free of defects and good in bonding quality. And then continuing to increase the power of laser impact to impact the composite material, and performing ultrasonic detection on the composite material after the impact is finished to obtain the ultrasonic signal characteristic value of the ultrasonic detection after the impact is finished each time until the ultrasonic signal characteristic value is not equal to the initial value of the ultrasonic signal, namely the composite material begins to have defects.
S7: repeatedly executing S2-S3, increasing the power of the laser impact in S2, and judging whether the ultrasonic signal characteristic value measured by the composite material after the previous impact is the same as the ultrasonic signal characteristic value measured by the composite material after the next impact;
and (3) continuing to perform S2 and S3 on the composite material, namely performing laser shock and ultrasonic detection on the composite material, when the composite material is defective, continuing to increase the power of the laser shock on the composite material for shock, finally shocking the composite material to a state exceeding the bonding critical state of the composite material until the composite material is completely debonded, wherein the ultrasonic signal characteristic value obtained through ultrasonic measurement is not changed, namely whether the ultrasonic signal characteristic value measured by the composite material after the previous shock is the same as the ultrasonic signal characteristic value measured by the composite material after the next shock is judged to judge whether the composite material is completely debonded.
S8: when the ultrasonic signal characteristic value measured by the composite material after the previous impact is different from the ultrasonic signal characteristic value measured by the composite material after the next impact, the step S7 is repeatedly executed;
when the ultrasonic signal characteristic value measured by the composite material after the previous impact is different from the ultrasonic signal characteristic value measured by the composite material after the next impact, the defect of the composite material is further enlarged, and the critical point of debonding of the composite material is not reached, so that the impact on the composite material is continuously increased until the composite material is debonded.
S9: when the ultrasonic signal characteristic value measured by the composite material after the current impact is the same as the ultrasonic signal characteristic value measured by the composite material after the next impact, the laser impact power of the composite material after the next impact is obtained;
when the ultrasonic signal characteristic value measured by the composite material after the current impact is the same as the ultrasonic signal characteristic value measured by the composite material after the next impact, namely, the composite material is debonded, and the laser impact power of the composite material after the next impact is obtained, namely, the laser impact power of the composite material when the composite material is impacted to debond.
S10: and acquiring the bonding strength of the composite material according to the laser impact power of the composite material impacted at the last time.
S11: and detecting the composite material according to the phased array to obtain the defect shape and the defect position of the composite material.
Can real-timely monitor the process of combined material from taking place the defect to debonding through phased array, obtain combined material's defect shape and defect position, can further promote ultrasonic testing's function, be favorable to the measurement personnel to gather more detection information to have more data analysis to combined material's adhesion.
S12: and generating a bonding strength performance curve of the composite material according to the power of each laser impact, the initial value of the ultrasonic signal and the characteristic value of each ultrasonic signal.
According to the power of each laser impact, the initial value of the ultrasonic signal and the characteristic value of each ultrasonic signal, the power of the laser impact is arranged on an X axis, the initial value of the ultrasonic signal and the characteristic value of each ultrasonic signal are arranged on a Y axis, the bonding strength performance curve of the composite material is generated, the bonding strength performance curve of the composite material can be clearly obtained through the bonding strength performance curve of the composite material, when the laser impact power changes, the change of the characteristic value of the ultrasonic signal can be known, and the bonding property analysis of the composite material by a detector can be facilitated.
According to the power of laser impact of the composite material of the next impact, the intensity of the laser impact can be directly obtained, and therefore the bonding strength of the composite material is determined. The method realizes the bonding strength limit quality inspection of newly developed or newly grown composite materials and the inspection of the qualification of workpieces using the composite materials, provides high-efficiency, continuous, real-time and low-disturbance measurement, particularly the detection of the composite material workpieces, and has the characteristic of no damage.
The ultrasonic detection method provided by the embodiment has the characteristics of high efficiency, rapidness and automation, realizes the detection of critical defects or initial states of the defects, and can realize the whole process detection of new product performance and the qualification detection in the stress and vibration range of the product in the using process by continuously increasing the power laser impact. The ultrasonic detection method provided by the embodiment has high detection efficiency, the laser impact time can be controlled within ms level, the ultrasonic detection can be controlled within second level, and the middle mobile positioning time is added, so that one-time impact and detection can be completed within about 3-5 seconds, the final total time can be calculated according to the increment of the laser impact power, and the efficiency of the whole manufacturing and measuring process is greatly improved compared with the existing bonding force test. The detection from the defect occurrence of the bonding interface to the debonding process is realized, and the bonding strength of the final composite material is obtained. And further solve the technical problem that the potential defect of the bonding interface of the composite material or the defect in a critical state can not be detected in the prior art.
Example two:
the invention also provides an ultrasonic detection device for the laser impact spalling defect, which comprises a composite material clamp 1, a comprehensive test system 9, a laser impact system and an ultrasonic detection system,
the comprehensive test system 9 is electrically connected with the laser impact system and the ultrasonic detection system;
the composite material clamp 1 is used for clamping a composite material;
the comprehensive test system 9 is used for sending signals to the laser impact system and the ultrasonic detection system according to the ultrasonic detection method of the laser impact spallation defect and processing received data sent back by the ultrasonic detection system;
the laser impact system is used for carrying out laser impact on the composite material according to the received signal sent by the comprehensive test system 9;
the ultrasonic detection system is used for carrying out ultrasonic detection on the composite material according to the received signal sent by the comprehensive test system 9 and sending the detected data back to the comprehensive test system 9.
Wherein, the ultrasonic detection device also comprises an XY platform 7 and an XY platform controller 8;
the ultrasonic detection system comprises an ultrasonic detection controller 5 and a phased array ultrasonic transducer 4 which are electrically connected with each other;
the XY platform controller 8 and the ultrasonic detection controller 5 are both electrically connected with the comprehensive test system 9;
the laser impact system is arranged above the composite material;
the phased array ultrasonic transducer 4 is arranged on the XY platform 7, and the XY platform controller 8 is used for controlling the XY platform 7 to move up and down so that the phased array ultrasonic transducer 4 is attached to the top surface or the bottom surface of the composite material;
as shown in fig. 3, when the phased array ultrasonic transducer 4 is tightly attached to the top surface of the composite material for testing, that is, when the phased array ultrasonic transducer 4 is on the same side as the laser impact system, the ultrasonic testing mode is a reflective ultrasonic testing mode.
When the phased array ultrasonic transducer 4 is tightly attached to the bottom surface of the composite material for testing, the phased array ultrasonic transducer 4 and the laser impact system are different in side, and a transmission type ultrasonic measurement mode is adopted.
The phased array ultrasonic transducer 4 is used for carrying out ultrasonic detection on the composite material;
the ultrasonic detection controller 5 is electrically connected with the phased array ultrasonic transducer 4 and is used for controlling the phased array ultrasonic transducer 4 to carry out ultrasonic detection on the composite material.
The laser impact system comprises a laser controller 3 and a laser source 2 which are electrically connected with each other, wherein the laser controller 3 is electrically connected with a comprehensive test system 9 and is used for controlling the laser source 2 to impact the composite material;
a force sensor 6 is arranged on the XY platform 7, and the force sensor 6 is used for detecting the adhesion force of the phased array ultrasonic transducer 4 and the composite material; the force sensor is electrically connected with the comprehensive test system,
the phased array ultrasound transducer 4 is preferably a Doppler D37.5L640.6 x 10 phased array ultrasound transducer 4.
The coupling material 41 is preferably glycerol.
The ultrasonic detection controller 5 is preferably a Robust 256-channel phased array ultrasonic detection board card.
The comprehensive test system 9 is preferably a host, and the comprehensive measurement and control system can display the ultrasonic test result of each time through a connected display screen.
The working surface of the phased array ultrasonic transducer 4 has a coupling material 41, and the coupling material 41 is used for removing air to enable the phased array ultrasonic transducer 4 to be attached to the bottom surface or the top surface of the composite material.
The transmission type ultrasonic detection process is carried out by taking the aluminum/adhesive/silicon structure composite material as an example and comprises the following steps:
after the aluminum/adhesive/silicon structure composite material is arranged on the composite material clamp 1, the XY platform controller 8 controls the XY platform 7 to drive the Doppler D37.5L640.6X 10 phased array ultrasonic transducer 4 to move to the bottom of the aluminum/adhesive/silicon structure composite material;
accurate control is carried out through composite material anchor clamps 1 and XY platform 7 for Doppler D37.5L640.6 10 phased array ultrasonic transducer 4 reaches aluminium/adhesive/silicon structure combined material bottom surface and pastes tightly, detects the adhesion through force sensor 6, guarantees that aluminium/adhesive/silicon structure combined material and phased array ultrasonic transducer 4 carry out effective contact.
Doppler D37.5L640.6 x 10 phased array ultrasound transducer 4 has glycerol as coupling material 41 on the working surface, which coupling material 41 is capable of excluding air from the adhesion to the bottom surface of the aluminum/adhesive/silicon structural composite. Compared with a transmission type ultrasonic detection mode, the reflection type ultrasonic detection device is characterized in that the working surface of the phased array ultrasonic transducer 4 is tightly attached to the top surface of the aluminum/adhesive/silicon structure composite material.
Controlling the Doppler D37.5L640.6X 10 phased array ultrasonic transducer 4 through the Robust 256 channel phased array ultrasonic detection board card to complete an excitation and receiving process, completing the initial state detection of the aluminum/adhesive/silicon structure composite material, judging the detection completion based on the comprehensive measurement and control system, sending an instruction to the XY platform controller 8 to control the XY platform 7 to bring the Doppler D37.5L640.6X 10 phased array ultrasonic transducer 4 back, and resetting.
The comprehensive measurement and control system sends an instruction to enable the laser controller 3 to control the laser source 2 to emit laser impact to enable the aluminum/adhesive/silicon structure composite material to be accurately controlled through the composite material clamp 1 and the XY platform 7 after the impact is finished, so that the Doppler D37.5L640.6X 10 phased array ultrasonic transducer 4 reaches the bottom surface of the aluminum/adhesive/silicon structure composite material and is tightly attached to the bottom surface of the aluminum/adhesive/silicon structure composite material for ultrasonic testing, and after the comprehensive measurement and control system judges that the detection is finished, the XY platform controller 8 controls the XY platform 7 to drive the Doppler D37.5L640.6X 10 phased array ultrasonic transducer 4 to retract and reset. The comprehensive measurement and control system controls the laser controller 3 and the laser source 2 to emit laser to impact the composite material, the impact power is increased according to a certain power increment principle, the impact is carried out, and after each increment impact, one ultrasonic detection is completed until the aluminum/adhesive/silicon structure composite material is completely debonded. In the measuring process, the comprehensive measurement and control system displays the ultrasonic detection result in an imaging mode every time, and the defect or debonding forming process is observed visually.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only a logical functional division of the ultrasonic detection method for laser shock delamination defects, and the actual implementation may have another division manner, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. An ultrasonic detection method for laser shock delamination defect is characterized by comprising the following steps:
s1: carrying out ultrasonic detection on the composite material to obtain an initial value of an ultrasonic signal;
s2: carrying out laser impact on the composite material to obtain the impacted composite material;
s3: carrying out ultrasonic detection on the impacted composite material to obtain an ultrasonic signal characteristic value;
s4: judging whether the ultrasonic signal characteristic value is equal to the ultrasonic signal initial value or not;
s5: when the ultrasonic signal characteristic value is not equal to the ultrasonic signal initial value, acquiring the power of the current laser impact, acquiring the bonding strength of the composite material starting to be debonded according to the power of the current laser impact, and executing S7;
s6: when the ultrasonic signal characteristic value is equal to the ultrasonic signal initial value, repeating the execution of S2-S6 and increasing the power of the laser shock in S2;
s7: repeatedly executing S2-S3, increasing the power of the laser impact in S2, and judging whether the ultrasonic signal characteristic value measured by the composite material after the previous impact is the same as the ultrasonic signal characteristic value measured by the composite material after the next impact;
s8: when the ultrasonic signal characteristic value measured by the composite material after the previous impact is different from the ultrasonic signal characteristic value measured by the composite material after the next impact, the step S7 is repeatedly executed;
s9: when the ultrasonic signal characteristic value measured by the composite material after the current impact is the same as the ultrasonic signal characteristic value measured by the composite material after the next impact, the laser impact power of the composite material after the next impact is obtained;
s10: and acquiring the bonding strength of the composite material according to the laser impact power of the composite material impacted at the last time.
2. The ultrasonic detection method for laser shock delamination defect of claim 1, wherein the setting of the power of laser shock in S2 specifically comprises:
when the composite material is a known material, the laser impact power is set to be the power corresponding to the lower limit of the qualified threshold value of the bonding strength of the known material according to the bonding strength of the known material, and the impact is started.
3. The ultrasonic detection method for laser shock delamination defect of claim 2, wherein the setting of the power of laser shock in S2 specifically comprises:
and when the composite material is a workpiece made of a new material, the composite material is impacted according to a preset initial value serving as the power of laser impact.
4. The ultrasonic testing method for the laser shock delamination defect of claim 3, wherein between said S1 and S2 further comprising:
s101: judging whether the initial value of the ultrasonic signal is within a preset threshold range;
s102: when the initial value of the ultrasonic signal is not within the preset threshold range, determining the quality of the composite material;
s103: when the initial value of the ultrasonic signal is within the preset threshold range, S2 is executed.
5. The ultrasonic detection method of the laser shock delamination defect of claim 4, further comprising:
s11: and detecting the composite material according to the phased array to obtain the defect shape and the defect position of the composite material.
6. The ultrasonic detection method of the laser shock delamination defect of claim 5, further comprising:
s12: and generating a bonding strength performance curve of the composite material according to the power of each laser impact, the initial value of the ultrasonic signal and the characteristic value of each ultrasonic signal.
7. The ultrasonic detection method for the laser shock delamination defect of claim 6, wherein the initial value of the ultrasonic signal and the characteristic value of the ultrasonic signal both comprise amplitude and harmonic time.
8. An ultrasonic detection device for laser shock delamination defect is characterized by comprising a composite material clamp, a comprehensive test system, a laser shock system and an ultrasonic detection system,
the comprehensive test system is electrically connected with the laser impact system and the ultrasonic detection system;
the composite material clamp is used for clamping a composite material;
the comprehensive test system is used for sending signals to the laser impact system and the ultrasonic detection system according to the ultrasonic detection method of the laser impact spallation defect in the claims 1-7 and processing received data sent back by the ultrasonic detection system;
the laser impact system is used for carrying out laser impact on the composite material according to the received signal sent by the comprehensive test system;
the ultrasonic detection system is used for carrying out ultrasonic detection on the composite material according to the received signal sent by the comprehensive test system and sending the detected data back to the comprehensive test system.
9. The ultrasonic detection device for the laser shock delamination defect of claim 8, wherein the ultrasonic detection device further comprises an XY stage and an XY stage controller;
the ultrasonic detection system comprises an ultrasonic detection controller and a phased array ultrasonic transducer which are electrically connected with each other;
the XY platform controller and the ultrasonic detection controller are both electrically connected with the comprehensive test system;
the laser impact system is arranged above the composite material;
the phased array ultrasonic transducer is arranged on the XY platform, and the XY platform controller is used for controlling the XY platform to move up and down so as to enable the phased array ultrasonic transducer to be tightly attached to the top surface or the bottom surface of the composite material;
the phased array ultrasonic transducer is used for carrying out ultrasonic detection on the composite material;
the ultrasonic detection controller is electrically connected with the phased array ultrasonic transducer and is used for controlling the phased array ultrasonic transducer to carry out ultrasonic detection on the composite material.
10. The ultrasonic detection device for the laser shock delamination defect of claim 9, wherein the laser shock system comprises a laser controller and a laser source which are electrically connected with each other, the laser controller is electrically connected with the comprehensive test system and is used for controlling the laser source to shock the composite material;
a force sensor is arranged on the XY platform and electrically connected with the comprehensive test system, and the force sensor is used for detecting the attaching force of the phased array ultrasonic transducer and the composite material;
the working surface of the phased array ultrasonic transducer is provided with a coupling material, and the coupling material is used for removing air so that the phased array ultrasonic transducer is attached to the bottom surface or the top surface of the composite material.
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| CN202010806113.6A CN111948288A (en) | 2020-08-12 | 2020-08-12 | Ultrasonic detection method and device for laser shock delamination defect |
| PCT/CN2020/131587 WO2022032930A1 (en) | 2020-08-12 | 2020-11-25 | Laser shock-based ultrasonic detection method and device for surface cracking defects |
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| CN202010806113.6A CN111948288A (en) | 2020-08-12 | 2020-08-12 | Ultrasonic detection method and device for laser shock delamination defect |
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| WO2022032930A1 (en) * | 2020-08-12 | 2022-02-17 | 广东工业大学 | Laser shock-based ultrasonic detection method and device for surface cracking defects |
| CN114509384A (en) * | 2022-02-18 | 2022-05-17 | 重庆交通大学 | Laser shock wave detection device for interface bonding force of different composite materials and optimal laser shock distance calculation method thereof |
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