CN109341912A - A kind of ultrasonic wave plane voussoir is used for the residual stress measuring method of curve surface work pieces - Google Patents
A kind of ultrasonic wave plane voussoir is used for the residual stress measuring method of curve surface work pieces Download PDFInfo
- Publication number
- CN109341912A CN109341912A CN201811344484.6A CN201811344484A CN109341912A CN 109341912 A CN109341912 A CN 109341912A CN 201811344484 A CN201811344484 A CN 201811344484A CN 109341912 A CN109341912 A CN 109341912A
- Authority
- CN
- China
- Prior art keywords
- ultrasonic wave
- work pieces
- voussoir
- curve surface
- stress
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- G01L1/25—Measuring force or stress, in general using wave or particle radiation, e.g. X-rays, microwaves, neutrons
- G01L1/255—Measuring force or stress, in general using wave or particle radiation, e.g. X-rays, microwaves, neutrons using acoustic waves, or acoustic emission
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
A method of plane voussoir is used for curve surface work pieces residual stress measurement, its step are as follows: S1, carrying out ultrasonic wave stress test to zero stress flat work pieces, the measured waveform x (n) of zero stress flat work pieces is acquired, the nominal sonoelastic coefficient K of flat work pieces is then demarcatedPla；S2, plane voussoir is used to acquire the measured waveform y (n) of curve surface work pieces to the ultrasonic wave stress test of curve surface work pieces to be measured；S3, the waveform time delay Δ t for calculating x (n) and y (n)Det, calculate the residual stress σ of curve surface work pieces to be measuredCur:Wherein, LWor,PlaThe actual propagation distance for being critical refraction longitudinal wave in flat work pieces；LWor,CurThe actual propagation distance for being critical refraction longitudinal wave in curve surface work pieces；ΔtGeoFor when carrying out ultrasonic wave stress test to flat work pieces and curve surface work pieces using plane voussoir, since flat work pieces are different with curve surface work pieces geometry, ultrasonic wave is in voussoir and the sound time difference caused by propagation time difference in coupling layer.This method can be simple and efficient, inexpensive, and precision is high.
Description
Technical field
The present invention relates to the residual stress measuring methods that a kind of ultrasonic wave plane voussoir is used for curve surface work pieces, belong to remnants and answer
The field of non destructive testing of power.
Background technique
Metal material inevitably results from plastic strain during machine-building, leads to residual stress, while
During workpiece is on active service, the inside of workpiece is influenced by aging or external load, and residual stress will change.Measure workpiece
The safety evaluation that residual stress can not only be on active service for structure provides data supporting, and can also improve production technology on this basis
The service life for further extending workpiece with member processing method, reduces production and operation cost.
There are many kinds of the intracorporal stress detections of object, according to whether destroying object to be detected, can be subdivided into three categories: have
Damage detection, micro-damage detection and non-destructive testing damage detection and micro- damage detection and be also known as mechanical detection method, wherein boring method
Using the most universal.Non-destructive testing is then to be detected with nondestructive physical method to component stress, mainly includes X-ray
The methods of diffraction approach, photoelastic method, eddy-current method and supercritical ultrasonics technology.Wherein x-ray method, ultrasonic method is in field of track traffic using most
It is universal.
Ultrasonic measurement residual stress is to will lead to ultrasonic wave when forces are applied for component in material based on Vocal cord injection
The variation of the parameters such as spread speed, supersonic frequency, amplitude, phase and energy inside material, by ultrasonic wave in component these
The measurement of parameter can find out the stress value of component inside according to correlation model indirectly.
In the early-stage study of ultrasonic wave residual stress measurement technology, a large amount of planar materials be used to test, but practical
Engineer application in be mostly curve surface work pieces to the demanding workpiece of Stress Control, such as pressure vessel, high-speed rail bogie, petroleum pipeline
Deng.And when carrying out ultrasonic wave residual stress measurement to curve surface work pieces, the voussoir that majority uses is plane voussoir, leads to critical folding
The propagation path for penetrating longitudinal wave changes, therefore it is necessary to carry out to measurement result when supercritical ultrasonics technology is to curve surface work pieces stress measurement
Amendment.
It in the conventional method, is more that suitable voussoir is customized according to the radius of curve surface work pieces to guarantee workpiece and probe
Coupling, but discovery is filled up plane voussoir with couplant and can be collected as the gap between workpiece enough in actual measurement
The measured waveform of intensity, while this method does not have to the voussoir of customization different curvature, practicability higher costs are lower.
Summary of the invention
The purpose of the present invention is by providing a kind of method that plane voussoir is used for curve surface work pieces residual stress measurement.It should
Method can simple and efficient, inexpensive, the residual stress of accurately measure curve surface work pieces.
The present invention realizes that its goal of the invention is adopted the technical scheme that: a kind of ultrasonic wave plane voussoir is used for curve surface work pieces
Residual stress measuring method, its step are as follows:
The zero stress flat work pieces of S1, production material identical as curve surface work pieces to be measured, holding plane voussoir and ultrasonic probe
Ultrasonic wave stress test is carried out, ultrasonic wave receiving transducer acquires the measured waveform x (n) of zero stress flat work pieces, then answers zero
Apply different stress σ on power flat work pieces and carry out ultrasonic wave stress test, demarcates the nominal sonoelastic coefficient of flat work pieces
KPla；
S2, holding plane voussoir and ultrasonic probe on curve surface work pieces to be measured smear enough couplants and sufficiently fill up flat
Gap between face voussoir and workpiece, carries out ultrasonic wave stress test, and ultrasonic wave receiving transducer acquires the measured waveform y of curve surface work pieces
(n)；Judge whether receive critical refraction longitudinal wave in measured waveform y (n), if being not received by critical refraction longitudinal wave, adjusts
Ultrasonic excitation receiver relevant parameter re-measures and guarantees that ultrasonic wave receiving transducer receives critical refraction longitudinal wave；If receiving
Critical refraction longitudinal wave then carries out in next step；
S3, noise reduction process is carried out to x (n), y (n), and calculates the waveform time delay Δ t of the twoDet, and calculate curved surface work to be measured
The residual stress σ of partCur:
Wherein, LWor,PlaWhen to carry out ultrasonic wave stress test to flat work pieces using plane voussoir, critical refraction longitudinal wave
Actual propagation distance in flat work pieces；
LWor,CurWhen to carry out ultrasonic wave stress test to curve surface work pieces using plane voussoir, critical refraction longitudinal wave is in curved surface
Actual propagation distance in workpiece；
ΔtGeoFor when carrying out ultrasonic wave stress test to flat work pieces and curve surface work pieces using plane voussoir, due to flat
Face workpiece is different with curve surface work pieces geometry, the sound time difference caused by ultrasonic wave is different with the propagation time in coupling layer in voussoir.
Further, apply different stress σ in step S1 of the present invention on zero stress flat work pieces and carry out ultrasonic wave
Stress test demarcates the nominal sonoelastic coefficient K of flat work piecesPlaSpecific method be: according to acquisition zero stress flat work pieces
Measured waveform x (n) obtains the propagation time t of ultrasonic wave workpiece under zero stress statezero, then in zero stress flat work pieces
It is upper to apply different stress σ progress ultrasonic wave stress tests, the propagation time of ultrasonic wave workpiece under different stress is measured,
The propagation time difference Δ t for calculating ultrasonic wave workpiece under σ stress state and zero stress state, by being fitted the stress σ and passing
The relationship for broadcasting time difference Δ t calculates the nominal sonoelastic coefficient K of the flat work piecesPla。
Further, when use plane voussoir of the present invention carries out ultrasonic wave stress test to flat work pieces, critical refraction
Actual propagation distance L of the longitudinal wave in flat work piecesWor,PlaIt is to be obtained by vernier caliper or miking.
Further, when use plane voussoir of the present invention carries out ultrasonic wave stress test to curve surface work pieces, critical refraction
Actual propagation distance L of the longitudinal wave in curve surface work piecesWor,CurIt is to be obtained by following formula: LWor,Cur=2Rcos β,
Wherein, β is in the case that ultrasonic wave receiving transducer can receive critical refraction wave, and ultrasonic wave is incident on from coupling layer
The refraction angle of curve surface work pieces；R is the radius of curve surface work pieces.
Further, of the present invention that ultrasonic wave stress test is being carried out to flat work pieces and curve surface work pieces using plane voussoir
When, since flat work pieces are different with curve surface work pieces geometry, ultrasonic wave is caused in voussoir and propagation time difference in coupling layer
Sound time difference Δ tGeoWhen specifically referring to carry out ultrasonic wave stress test to flat work pieces using plane voussoir, ultrasonic wave is in plane
Propagation time t in voussoir and coupling layerGeo, PlaWhen with carrying out ultrasonic wave stress test to curve surface work pieces using plane voussoir, surpass
Propagation time t of the sound wave in plane voussoir and coupling layerGeo,CurDifference, Δ tGeo=tGeo,Cur-tGeo, Pla。
Further, when use plane voussoir of the present invention carries out ultrasonic wave stress test to flat work pieces, ultrasonic wave
Propagation time t in plane voussoir and coupling layerGeo, PlaIt is obtained by following formula: tGeo, Pla=2h/ (VWedgecosiLCR)；
Wherein, h is the vertical range of the piezoelectric chip center anomaly face voussoir bottom surface of ultrasonic probe；
iLCRFor the first critical refraction angle of flat work pieces material；
VWedgeThe spread speed for being ultrasonic wave in voussoir.
Further, when use plane voussoir of the present invention carries out ultrasonic wave stress test to curve surface work pieces, ultrasonic wave
Propagation time t in plane voussoir and coupling layerGeo,CurIt is obtained by following formula:
Wherein, h is the vertical range of the piezoelectric chip center anomaly face voussoir bottom surface of ultrasonic probe；
VWedgeThe spread speed for being ultrasonic wave in voussoir；
β is in the case that ultrasonic wave receiving transducer can receive critical refraction wave, and ultrasonic wave is incident on curved surface from coupling layer
The refraction angle of workpiece；
iCouIn the case where critical refraction wave can be received for ultrasonic wave receiving transducer, ultrasonic wave is incident on from plane voussoir
Incidence angle when coupling layer；
γCouIn the case where critical refraction wave can be received for ultrasonic wave receiving transducer, ultrasonic wave is incident on from plane voussoir
Refraction angle when coupling layer；
R is the radius of curve surface work pieces；
VCouThe spread speed for being ultrasonic wave in couplant.
Further, in the case that ultrasonic wave receiving transducer can receive critical refraction wave in the present invention, ultrasonic wave is from plane
Voussoir is incident on incidence angle i when coupling layerCouWith refraction angle γCou, ultrasonic wave is incident on the refraction of curve surface work pieces from coupling layer
Angle beta is obtained by following formula:
Wherein, VCouThe spread speed for being ultrasonic wave in couplant；
VWedgeThe spread speed for being ultrasonic wave in voussoir；
VWorThe spread speed for being critical refraction longitudinal wave in curve surface work pieces, VWorWith critical refraction longitudinal wave in zero stress plane
Spread speed V in workpieceWor, ZeroVery little is differed, takes V when calculatingWor=VWor, Zero；
LWor,PlaWhen to carry out ultrasonic wave stress test to flat work pieces using plane voussoir, critical refraction longitudinal wave is in plane
Actual propagation distance in workpiece；
iLCRFor the first critical refraction angle of flat work pieces material；
R is the radius of curve surface work pieces；
H is the vertical range of the piezoelectric chip center anomaly face voussoir bottom surface of ultrasonic probe.
Spread speed V of the ultrasonic wave in voussoirWedge, spread speed V of the ultrasonic wave in couplantCouIt can be with
It is measured by sound velocimeter.
Further, spread speed V of the critical refraction longitudinal wave of the present invention in zero stress flat work piecesWor, ZeroIt is logical
Following formula is crossed to be calculated:
VWor, Zero=LWor,Pla/[tzero-2h/(VWedgecosiLCR)]
Wherein, LWor,PlaWhen to carry out ultrasonic wave stress test to flat work pieces using plane voussoir, critical refraction longitudinal wave
Actual propagation distance in flat work pieces；
tzeroFor the propagation time of ultrasonic wave workpiece under zero stress state；
VWedgeThe spread speed for being ultrasonic wave in voussoir；
iLCRFor the first critical refraction angle of flat work pieces material；
H is the vertical range of the piezoelectric chip center anomaly face voussoir bottom surface of ultrasonic probe.
Detailed description of the invention
Fig. 1 is flow diagram of the ultrasonic wave plane voussoir of the present invention for the residual stress measuring method of curve surface work pieces.
Fig. 2 is the ultrasonic wave propagation path schematic diagram that the present invention carries out ultrasonic wave stress test to zero stress flat work pieces.
Fig. 3 is the ultrasonic wave propagation path schematic diagram that the present invention carries out ultrasonic wave stress test to curve surface work pieces.
Fig. 4 is the ultrasonic wave propagation path enlarged diagram that the present invention carries out ultrasonic wave stress test to curve surface work pieces.
Fig. 5 be the present invention to flat work pieces and curve surface work pieces ultrasonic wave stress test when, propagation of the ultrasonic wave in voussoir
Path schematic diagram.
Fig. 6 is the embodiment of the present invention to the schematic diagram for carrying out ultrasonic wave stress test at the top of C-shaped ring.
Fig. 7 is the nominal sonoelastic coefficient K that the embodiment of the present invention demarcates flat work piecesPlaShi Yingli σ and propagation time difference Δ
The fit correlation figure of t.
Fig. 8 is that C-shaped ring dome top surface simulation stress is answered with this method measurement under difference of embodiment of the present invention screw-in depth
The comparison diagram of power.
Specific embodiment
Fig. 1 is flow diagram of the ultrasonic wave plane voussoir of the present invention for the residual stress measuring method of curve surface work pieces,
Specifically describe below by step: a kind of ultrasonic wave plane voussoir is used for the residual stress measuring method of curve surface work pieces, and step is such as
Under:
The zero stress flat work pieces of S1, production material identical as curve surface work pieces to be measured, holding plane voussoir and ultrasonic probe
Ultrasonic wave stress test is carried out, ultrasonic wave receiving transducer acquires the measured waveform x (n) of zero stress flat work pieces, and Fig. 2 is to answer zero
The ultrasonic wave propagation path schematic diagram of power flat work pieces progress ultrasonic wave stress test；Then apply on zero stress flat work pieces
Different stress σ carries out ultrasonic wave stress test, demarcates the nominal sonoelastic coefficient K of flat work piecesPla, specific method is: according to
The measured waveform x (n) for acquiring zero stress flat work pieces, obtains the propagation time t of ultrasonic wave workpiece under zero stress statezero,
Then apply different stress σ on zero stress flat work pieces and carry out ultrasonic wave stress test, measure ultrasonic wave in different stress
The propagation time of workpiece under state calculates the propagation time difference Δ t of ultrasonic wave workpiece under σ stress state and zero stress state,
By being fitted the relationship of the stress σ and propagation time difference Δ t, the nominal sonoelastic coefficient K of the flat work pieces is calculatedPla；
S2, holding plane voussoir and ultrasonic probe on curve surface work pieces to be measured smear enough couplants and sufficiently fill up flat
Gap between face voussoir and workpiece, carries out ultrasonic wave stress test, and ultrasonic wave receiving transducer acquires the measured waveform y of curve surface work pieces
(n), judge whether receive critical refraction longitudinal wave in measured waveform y (n), if being not received by critical refraction longitudinal wave, adjust
Ultrasonic excitation receiver relevant parameter re-measures and guarantees that ultrasonic wave receiving transducer receives critical refraction longitudinal wave；If receiving
Critical refraction longitudinal wave then carries out in next step；Fig. 3 is that curve surface work pieces are carried out with ultrasonic wave stress test, is connect in measured waveform y (n)
Receive the ultrasonic wave propagation path schematic diagram of critical refraction longitudinal wave；
S3, noise reduction process is carried out to x (n), y (n), and calculates the waveform time delay Δ t of the twoDet, and calculate curved surface work to be measured
The residual stress σ of partCur:
Wherein, LWor,PlaWhen to carry out ultrasonic wave stress test to flat work pieces using plane voussoir, critical refraction longitudinal wave
Actual propagation distance in flat work pieces；As shown in Fig. 2, LWor,Pla=C1D1, LWor,PlaVernier caliper or micrometer can be passed through
What measurement obtained；
ΔtGeoFor when carrying out ultrasonic wave stress test to flat work pieces and curve surface work pieces using plane voussoir, due to flat
Face workpiece is different with curve surface work pieces geometry, the sound time difference caused by ultrasonic wave is different with the propagation time in coupling layer in voussoir,
ΔtGeoWhen specifically referring to carry out ultrasonic wave stress test to flat work pieces using plane voussoir, ultrasonic wave is in plane voussoir and coupling
Close the propagation time t in layerGeo, PlaWhen with carrying out ultrasonic wave stress test to curve surface work pieces using plane voussoir, ultrasonic wave is flat
Propagation time t in face voussoir and coupling layerGeo,CurDifference, Δ tGeo=tGeo,Cur-tGeo, Pla；
As shown in Fig. 2, coupling layer is very thin when the use plane voussoir carries out ultrasonic wave stress test to flat work pieces,
Propagation time of the ultrasonic wave in coupling layer is negligible, then propagation time of the ultrasonic wave in plane voussoir and coupling layer
tGeo, PlaAs propagation time of the ultrasonic wave in plane voussoir, tGeo, Pla=AC1+D1B=2h/ (VWedgecosiLCR), wherein h
For the vertical range of the piezoelectric chip center anomaly face voussoir bottom surface of ultrasonic probe；iLCRFirst for flat work pieces material is critical
Refraction angle；VWedgeThe spread speed for being ultrasonic wave in voussoir, can be measured by sound velocimeter.
For curve surface work pieces shown in Fig. 3 measurement when, ultrasonic wave by excitation probe excitation after in C2Point is incident in coupling layer
And it reflects；Sound wave continues to propagate to E in coupling layer2Point is caused due to the influence of part curvature in E2Point sound wave enters
Firing angle is less than the first critical refraction angle iLCR, since there are certain angles of flare for ultrasonic probe itself, so being closed at voussoir inclination angle
An E is certainly existed on workpiece in the case where suitable2Point is so that the incidence angle of the sound wave is equal to the first critical angle of incidence.To in work
Critical refraction wave, direction of propagation E are generated in part2The tangential direction of point.Again since critical refraction longitudinal wave is in communication process
It can spread, so in E2The critical refraction wave that point generates not fully is conducted along the outer surface of workpiece, but in workpiece
Portion and E2It is propagated in the angled range of point tangent line, being received the critical refraction wave that probe detects at first is along string
E2F2It propagates, and in F2Point is incident on coupling layer and is again incident on voussoir, is finally received probe and receives.Ultrasonic wave shown in Fig. 3
Propagation path ultrasonic wave receiving transducer can receive critical refraction wave in the case where propagation path, Fig. 4 be to curve surface work pieces into
The ultrasonic wave propagation path enlarged diagram of row ultrasonic wave stress test.Shown in Fig. 3 and Fig. 4, ultrasonic wave receiving transducer can be received
In the case where critical refraction wave, incidence angle when ultrasonic wave is incident on coupling layer from plane voussoir is iCou, ultrasonic wave is from plane
Refraction angle when voussoir is incident on coupling layer is γCou, ultrasonic wave from coupling layer be incident on curve surface work pieces refraction angle be β.
As shown in figure 4, actual propagation distance L of the critical refraction longitudinal wave in curve surface work piecesWor,CurIt is to pass through following formula
It obtains: LWor,Cur=E2F2=2R cos β,
As shown in Figure 3 and Figure 4, when the use plane voussoir carries out ultrasonic wave stress test to curve surface work pieces, ultrasonic wave
Propagation time t in plane voussoir and coupling layerGeo,CurIt is obtained by following formula:
Wherein, wherein LWedgeWhen to carry out ultrasonic wave stress test to curve surface work pieces using plane voussoir, ultrasonic wave wave exists
Propagation distance in voussoir, LCouWhen to carry out ultrasonic wave stress test to curve surface work pieces using plane voussoir, ultrasonic wave is being coupled
Propagation distance in layer, h are the vertical range of the piezoelectric chip center anomaly face voussoir bottom surface of ultrasonic probe；VWedgeFor ultrasonic wave
Spread speed in voussoir, VCouThe spread speed for being ultrasonic wave in couplant, β are that ultrasonic wave receiving transducer can receive
In the case where critical refraction wave, ultrasonic wave is incident on the refraction angle of curve surface work pieces from coupling layer；iCouFor ultrasonic wave receiving transducer energy
Incidence angle in the case where receiving critical refraction wave, when ultrasonic wave is incident on coupling layer from plane voussoir；γCouFor ultrasonic wave
Refraction angle in the case that receiving transducer can receive critical refraction wave, when ultrasonic wave is incident on coupling layer from plane voussoir；R is
The radius of curve surface work pieces；Δ h is to calculate intermediate geometric sense, as shown in Figure 4.
Spread speed V of the above-mentioned ultrasonic wave in voussoirWedge, spread speed V of the ultrasonic wave in couplantCouIt can pass through
Sound velocimeter measures.
Optionally, in the case that ultrasonic wave receiving transducer can receive critical refraction wave, ultrasonic wave is incident from plane voussoir
Incidence angle i when to coupling layerCouWith refraction angle γCou, ultrasonic wave from coupling layer be incident on the refraction angle β of curve surface work pieces by with
Lower formula obtains:
Wherein, VCouThe spread speed for being ultrasonic wave in couplant；
VWorThe spread speed for being critical refraction longitudinal wave in curve surface work pieces, VWorWith critical refraction longitudinal wave in zero stress plane
Spread speed V in workpieceWor, ZeroVery little is differed, takes V when calculatingWor=VWor, Zero；
LWor,PlaWhen to carry out ultrasonic wave stress test to flat work pieces using plane voussoir, critical refraction longitudinal wave is in plane
Actual propagation distance in workpiece；
iLCRFor the first critical refraction angle of flat work pieces material；
R is the radius of curve surface work pieces；
VWedgeThe spread speed for being ultrasonic wave in voussoir.
The reasoning process of above-mentioned formula is provided below with reference to Fig. 3, Fig. 4 and Fig. 5:
Ultrasonic wave is in E2Point at can just prompt critical refracted longitudinal wave, then have:
In formula, iCurIndicate incidence angle when ultrasonic wave is incident on workpiece from coupling layer,
VCouThe spread speed for being ultrasonic wave in couplant；
VWorThe spread speed for being critical refraction longitudinal wave in curve surface work pieces.
In Δ C2E2M and Δ OE2It can be obtained, be had by geometric knowledge in H:
Wherein | C2N | indicate Fig. 4 middle conductor C2The length of N, Fig. 5 are to survey to flat work pieces and curve surface work pieces ultrasound wave stress
When examination, propagation path of the ultrasonic wave in voussoir, wherein AC1When for flat work pieces ultrasonic wave stress test, ultrasonic wave is in wedge
Propagation path in block；AC2When for curve surface work pieces ultrasonic wave stress test, propagation path of the ultrasonic wave in voussoir.In Fig. 5
Middle Δ AC1C2In can be obtained by geometrical relationship | C1C2|=h (tan iLCR-tan iCou), and combine Fig. 4 availableTherefore have
Simultaneous (1-1), (1-2), (1-3) and (1-4) can be obtained β and meet following equation:
Further according to Snell law, and available:
Following equation group can be obtained by joint type (1-1), (1-2), (1-5) and (1-6):
In above-mentioned equation group,
VCouThe spread speed for being ultrasonic wave in couplant, can be measured by sound velocimeter；
VWedgeThe spread speed for being ultrasonic wave in voussoir, can be measured by sound velocimeter；
iLCRIt for the first critical refraction angle of flat work pieces material, can be obtained by tabling look-up, such as following table
First critical angle of incidence of 1 different materials of table
LWor,PlaWhen to carry out ultrasonic wave stress test to flat work pieces using plane voussoir, critical refraction longitudinal wave is in plane
Actual propagation distance in workpiece can be obtained by vernier caliper or miking；
R is the radius of curve surface work pieces, can be obtained by measurement.
In addition to above-mentioned parameter, there are four unknown quantitys, due to spread speed V of the critical refraction longitudinal wave in curve surface work piecesWor
It is unknown, lead to equation intangibility, but since stress influences very little, V to ultrasonic propagation velocityWorExist with critical refraction longitudinal wave
Spread speed V in zero stress flat work piecesWor, ZeroDiffer very little VWor≈VWor,Zero, taken when calculating: VWor=VWor,Zero；
Spread speed V of the critical refraction longitudinal wave in zero stress flat work piecesWor, ZeroIt can be surveyed by sound velocimeter
?；But by needing to work the work piece into specific shape by sound velocimeter survey spread speed, it is advantageous to,
VWor, ZeroFollowing formula is calculated:
VWor, Zero=LWor,Pla/[tzero-2h/(VWedgecosiLCR)]
Wherein, LWor,PlaWhen to carry out ultrasonic wave stress test to flat work pieces using plane voussoir, critical refraction longitudinal wave
Actual propagation distance in flat work pieces can be obtained by vernier caliper or miking；
tzeroFor the propagation time of ultrasonic wave workpiece under zero stress state, the zero stress plane work acquired according to step S1
The measured waveform x (n) of part is obtained；
VWedgeThe spread speed for being ultrasonic wave in voussoir, can be measured by sound velocimeter；
iLCRFor the first critical refraction angle of flat work pieces material, can be obtained by tabling look-up；
H is the vertical range of the piezoelectric chip center anomaly face voussoir bottom surface of ultrasonic probe, can be obtained by measurement.
In this way, only remaining three unknown quantitys can be obtained ultrasonic wave and connect by solve system of equation (1-7) in equation group (1-7)
In the case that receipts probe can receive critical refraction wave, incidence angle i when ultrasonic wave is incident on coupling layer from plane voussoirCouWith
Refraction angle γCouAnd ultrasonic wave is incident on the refraction angle β of curve surface work pieces from coupling layer.
Inventive method is described further combined with specific embodiments below.
Embodiment
As shown in fig. 6, measured workpiece is by the outer diameter that Q345 material makes is 200mm, the C-shaped ring of internal diameter 190mm, pass through
Along radial direction tightening nuts, to generate different stress in C-shaped ring dome top surface, its top is obtained by finite element modelling
The stress intensity of portion upper surface；And ultrasonic stress test is carried out to the stress using the method for the present invention,
Specific implementation step:
The zero stress flat work pieces of S1, production material identical as curve surface work pieces to be measured, holding plane voussoir and ultrasonic probe
Ultrasonic wave stress test is carried out, ultrasonic wave receiving transducer acquires the measured waveform x (n) of zero stress flat work pieces, according to acquisition zero
The measured waveform x (n) of stress plane workpiece obtains the propagation time t of ultrasonic wave workpiece under zero stress statezero, then exist
Apply different stress σ on zero stress flat work pieces and carry out ultrasonic wave stress test, measures ultrasonic wave under different stress
The propagation time of workpiece calculates the propagation time difference Δ t of ultrasonic wave workpiece under σ stress state and zero stress state, by quasi-
The relationship of the stress σ Yu propagation time difference Δ t are closed, as shown in fig. 7, calculating the nominal sonoelastic coefficient of the flat work pieces
KPla=9.769MPa/ns；
S2, holding plane voussoir and ultrasonic probe on curve surface work pieces to be measured smear enough couplants and sufficiently fill up flat
Gap between face voussoir and workpiece, carries out ultrasonic wave stress test, and ultrasonic wave receiving transducer acquires the measured waveform y of curve surface work pieces
(n), judge whether receive critical refraction longitudinal wave in measured waveform y (n), if being not received by critical refraction longitudinal wave, adjust
Ultrasonic excitation receiver relevant parameter re-measures and guarantees that ultrasonic wave receiving transducer receives critical refraction longitudinal wave；If receiving
Critical refraction longitudinal wave then carries out in next step；
S3, noise reduction process is carried out to x (n), y (n), and calculates the waveform time delay Δ t of the twoDet, and calculate curved surface work to be measured
The residual stress σ of partCur:
Wherein, LWor,PlaWhen to carry out ultrasonic wave stress test to flat work pieces using plane voussoir, critical refraction longitudinal wave
Actual propagation distance in flat work pieces；L in this exampleWor,PlaIt is obtained by miking, LWor,Pla=50.000mm
ΔtGeoFor when carrying out ultrasonic wave stress test to flat work pieces and curve surface work pieces using plane voussoir, due to flat
Face workpiece is different with curve surface work pieces geometry, the sound time difference caused by ultrasonic wave is different with the propagation time in coupling layer in voussoir,
ΔtGeoWhen specifically referring to carry out ultrasonic wave stress test to flat work pieces using plane voussoir, ultrasonic wave is in plane voussoir and coupling
Close the propagation time t in layerGeo, PlaWhen with carrying out ultrasonic wave stress test to curve surface work pieces using plane voussoir, ultrasonic wave is flat
Propagation time t in face voussoir and coupling layerGeo,CurDifference, Δ tGeo=tGeo,Cur-tGeo, Pla；
When carrying out ultrasonic wave stress test to flat work pieces using plane voussoir, coupling layer is very thin, and ultrasonic wave is in coupling layer
In propagation time it is negligible, then propagation time t of the ultrasonic wave in plane voussoir and coupling layerGeo, PlaAs ultrasonic wave
Propagation time in plane voussoir, tGeo, Pla=2h/ (VWedgecosiLCR), wherein h is the piezoelectric chip center of ultrasonic probe
The vertical range of anomaly face voussoir bottom surface, through measuring h=2mm in this example；iLCRFor the first critical refraction of flat work pieces material
Angle；VWedgeThe spread speed for being ultrasonic wave in voussoir measures V through sound velocimeter in this exampleWedge=2651.2m/s.
Critical refraction longitudinal wave is in curve surface work pieces when using plane voussoir to curve surface work pieces progress ultrasonic wave stress test
Actual propagation distance LWor,CurIt is to be obtained by following formula: LWor,Cur=2Rcos β,
Wherein, β is in the case that ultrasonic wave receiving transducer can receive critical refraction wave, and ultrasonic wave is incident on from coupling layer
The refraction angle of curve surface work pieces；R is the radius of curve surface work pieces；
When carrying out ultrasonic wave stress test to curve surface work pieces using plane voussoir, ultrasonic wave is in plane voussoir and coupling layer
Propagation time tGeo,CurIt is obtained by following formula:
Wherein, iCouIn the case where critical refraction wave can be received for ultrasonic wave receiving transducer, ultrasonic wave enters from plane voussoir
It is mapped to incidence angle when coupling layer；γCouIn the case where critical refraction wave can be received for ultrasonic wave receiving transducer, ultrasonic wave from
Plane voussoir is incident on refraction angle when coupling layer；VCouThe spread speed for being ultrasonic wave in couplant is surveyed through the velocity of sound in this example
Amount instrument measures VCou=1752.5m/s
Unknown quantity in above-mentioned formula: in the case that ultrasonic wave receiving transducer can receive critical refraction wave, ultrasonic wave from
Plane voussoir is incident on incidence angle i when coupling layerCouWith refraction angle γCou, ultrasonic wave is incident on curve surface work pieces from coupling layer
Refraction angle β is obtained by following formula:
Wherein, VWorThe spread speed for being critical refraction longitudinal wave in curve surface work pieces, VWorIt is answered with critical refraction longitudinal wave zero
Spread speed V in power flat work piecesWor, ZeroVery little is differed, takes V when calculatingWor=VWor, Zero；
Spread speed V of the critical refraction longitudinal wave in zero stress flat work pieces in this exampleWor,ZeroIt is by following formula meter
It obtains:
VWor, Zero=LWor,Pla/[tzero-2h/(VWedgecosiLCR)]。
It is screwed into depth by changing nut, different stress is generated in C-shaped ring dome top surface, is obtained by finite element modelling
To the stress intensity of its dome top surface；And ultrasonic stress test is carried out to the stress using the method for the present invention, it obtains simulation and answers
Power and this method measure stress comparison diagram, as shown in Figure 8.
From figure 8, it is seen that (negligible C-shaped ring measures part in compression process when screw-in depth is less than 15mm
The variation that curvature occurs), stress and the analogue value measured by the method for the present invention coincide substantially, measurement accuracy height.Screw-in depth is
It is because C-shaped ring is in compression process that measured value, which differs larger with the analogue value, when greater than 15mm, and measuring the curvature of part also can be with
Change caused by.
Claims (10)
1. a kind of ultrasonic wave plane voussoir is used for the residual stress measuring method of curve surface work pieces, its step are as follows:
The zero stress flat work pieces of S1, production material identical as curve surface work pieces to be measured, holding plane voussoir and ultrasonic probe carry out
Ultrasonic wave stress test, ultrasonic wave receiving transducer acquire the measured waveform x (n) of zero stress flat work pieces, then flat in zero stress
Apply different stress σ on the workpiece of face and carry out ultrasonic wave stress test, demarcates the nominal sonoelastic coefficient K of flat work piecesPla；
S2, holding plane voussoir and ultrasonic probe on curve surface work pieces to be measured smear enough couplants and sufficiently fill up plane wedge
Gap between block and workpiece, carries out ultrasonic wave stress test, and ultrasonic wave receiving transducer acquires the measured waveform y (n) of curve surface work pieces；
Judge whether receive critical refraction longitudinal wave in detection waveform y (n), if being not received by critical refraction longitudinal wave, adjusts ultrasound
Receiver relevant parameter is excited, re-measures and guarantees that ultrasonic wave receiving transducer receives critical refraction longitudinal wave；If receiving critical
Refracted longitudinal wave then carries out in next step；
S3, noise reduction process is carried out to x (n), y (n), and calculates the waveform time delay Δ t of the twoDet, and calculate curve surface work pieces to be measured
Residual stress σCur:
Wherein, LWor,PlaWhen to carry out ultrasonic wave stress test to flat work pieces using plane voussoir, critical refraction longitudinal wave is in plane
Actual propagation distance in workpiece；
LWor,CurWhen to carry out ultrasonic wave stress test to curve surface work pieces using plane voussoir, critical refraction longitudinal wave is in curve surface work pieces
In actual propagation distance；
ΔtGeoFor when carrying out ultrasonic wave stress test to flat work pieces and curve surface work pieces using plane voussoir, due to plane work
Part is different with curve surface work pieces geometry, the sound time difference caused by ultrasonic wave is different with the propagation time in coupling layer in voussoir.
2. a kind of ultrasonic wave plane voussoir according to claim 1 is used for the residual stress measuring method of curve surface work pieces,
It is characterized in that: applying different stress σ in the step S1 on zero stress flat work pieces and carry out ultrasonic wave stress test, calibration
The nominal sonoelastic coefficient K of flat work piecesPlaSpecific method be: according to acquisition zero stress flat work pieces measured waveform x (n),
Obtain the propagation time t of ultrasonic wave workpiece under zero stress statezero, then apply different answer on zero stress flat work pieces
Power σ carries out ultrasonic wave stress test, measures the propagation time of ultrasonic wave workpiece under different stress, calculates ultrasonic wave in σ
The propagation time difference Δ t of workpiece under stress state and zero stress state, by being fitted the stress σ's and propagation time difference Δ t
Relationship calculates the nominal sonoelastic coefficient K of the flat work piecesPla。
3. a kind of ultrasonic wave plane voussoir according to claim 1 is used for the residual stress measuring method of curve surface work pieces,
Be characterized in that: when the use plane voussoir carries out ultrasonic wave stress test to flat work pieces, critical refraction longitudinal wave is in plane work
Actual propagation distance L in partWor,PlaIt is to be obtained by vernier caliper or miking.
4. a kind of ultrasonic wave plane voussoir according to claim 1 is used for the residual stress measuring method of curve surface work pieces,
Be characterized in that: when the use plane voussoir carries out ultrasonic wave stress test to curve surface work pieces, critical refraction longitudinal wave is in curved surface work
Actual propagation distance L in partWor,CurIt is to be obtained by following formula: LWor,Cur=2R cos β,
Wherein, β is in the case that ultrasonic wave receiving transducer can receive critical refraction wave, and ultrasonic wave is incident on curved surface from coupling layer
The refraction angle of workpiece；R is the radius of curve surface work pieces.
5. a kind of ultrasonic wave plane voussoir according to claim 1 is used for the residual stress measuring method of curve surface work pieces,
It is characterized in that: it is described when carrying out ultrasonic wave stress test to flat work pieces and curve surface work pieces using plane voussoir, due to plane
Workpiece is different with curve surface work pieces geometry, sound time difference Δ caused by ultrasonic wave is different with the propagation time in coupling layer in voussoir
tGeoWhen specifically referring to carry out ultrasonic wave stress test to flat work pieces using plane voussoir, ultrasonic wave is in plane voussoir and coupling
Propagation time t in layerGeo, PlaWhen with carrying out ultrasonic wave stress test to curve surface work pieces using plane voussoir, ultrasonic wave is in plane
Propagation time t in voussoir and coupling layerGeo,CurDifference, Δ tGeo=tGeo,Cur-tGeo, Pla。
6. a kind of ultrasonic wave plane voussoir according to claim 5 is used for the residual stress measuring method of curve surface work pieces,
Be characterized in that: when the use plane voussoir carries out ultrasonic wave stress test to flat work pieces, ultrasonic wave is in plane voussoir and coupling
Close the propagation time t in layerGeo, PlaIt is obtained by following formula: tGeo, Pla=2h/ (VWedgecosiLCR)；
Wherein, h is the vertical range of the piezoelectric chip center anomaly face voussoir bottom surface of ultrasonic probe；
iLCRFor the first critical refraction angle of flat work pieces material；
VWedgeThe spread speed for being ultrasonic wave in voussoir.
7. a kind of ultrasonic wave plane voussoir according to claim 5 is used for the residual stress measuring method of curve surface work pieces,
Be characterized in that: when the use plane voussoir carries out ultrasonic wave stress test to curve surface work pieces, ultrasonic wave is in plane voussoir and coupling
Close the propagation time t in layerGeo,CurIt is obtained by following formula:
Wherein, h is the vertical range of the piezoelectric chip center anomaly face voussoir bottom surface of ultrasonic probe；
VWedgeThe spread speed for being ultrasonic wave in voussoir；
β is in the case that ultrasonic wave receiving transducer can receive critical refraction wave, and ultrasonic wave is incident on curve surface work pieces from coupling layer
Refraction angle；
iCouIn the case where critical refraction wave can be received for ultrasonic wave receiving transducer, ultrasonic wave is incident on coupling from plane voussoir
Incidence angle when layer；
γCouIn the case where critical refraction wave can be received for ultrasonic wave receiving transducer, ultrasonic wave is incident on coupling from plane voussoir
Refraction angle when layer；
R is the radius of curve surface work pieces；
VCouThe spread speed for being ultrasonic wave in couplant.
8. a kind of ultrasonic wave plane voussoir according to claim 4 or 7 is used for the residual stress measuring method of curve surface work pieces,
It is characterized by: ultrasonic wave is incident on coupling from plane voussoir in the case that ultrasonic wave receiving transducer can receive critical refraction wave
Close incidence angle i when layerCouWith refraction angle γCou, ultrasonic wave passes through following public affairs from the refraction angle β that coupling layer is incident on curve surface work pieces
Formula obtains:
Wherein, VCouThe spread speed for being ultrasonic wave in couplant；
VWedgeThe spread speed for being ultrasonic wave in voussoir；
VWorThe spread speed for being critical refraction longitudinal wave in curve surface work pieces, VWorWith critical refraction longitudinal wave in zero stress flat work pieces
In spread speed VWor, ZeroVery little is differed, takes V when calculatingWor=VWor, Zero；
LWor,PlaWhen to carry out ultrasonic wave stress test to flat work pieces using plane voussoir, critical refraction longitudinal wave is in flat work pieces
In actual propagation distance；
iLCRFor the first critical refraction angle of flat work pieces material；
R is the radius of curve surface work pieces；
H is the vertical range of the piezoelectric chip center anomaly face voussoir bottom surface of ultrasonic probe.
9. a kind of ultrasonic wave plane voussoir according to claim 8 is used for the residual stress measuring method of curve surface work pieces,
It is characterized in that: spread speed V of the ultrasonic wave in voussoirWedge, spread speed V of the ultrasonic wave in couplantCouIt is to pass through
Sound velocimeter measures.
10. a kind of ultrasonic wave plane voussoir according to claim 8 is used for the residual stress measuring method of curve surface work pieces,
It is characterized in that: spread speed V of the critical refraction longitudinal wave in zero stress flat work piecesWor, ZeroIt is to be calculated by the following formula
It obtains:
VWor, Zero=LWor,Pla/[tzero-2h/(VWedgecosiLCR)]
Wherein, LWor,PlaWhen to carry out ultrasonic wave stress test to flat work pieces using plane voussoir, critical refraction longitudinal wave is in plane
Actual propagation distance in workpiece；
tzeroFor the propagation time of ultrasonic wave workpiece under zero stress state；
VWedgeThe spread speed for being ultrasonic wave in voussoir；
iLCRFor the first critical refraction angle of flat work pieces material；
H is the vertical range of the piezoelectric chip center anomaly face voussoir bottom surface of ultrasonic probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811344484.6A CN109341912B (en) | 2018-11-13 | 2018-11-13 | A kind of ultrasonic wave plane voussoir is used for the residual stress measuring method of curve surface work pieces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811344484.6A CN109341912B (en) | 2018-11-13 | 2018-11-13 | A kind of ultrasonic wave plane voussoir is used for the residual stress measuring method of curve surface work pieces |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109341912A true CN109341912A (en) | 2019-02-15 |
| CN109341912B CN109341912B (en) | 2019-11-01 |
Family
ID=65314636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811344484.6A Active CN109341912B (en) | 2018-11-13 | 2018-11-13 | A kind of ultrasonic wave plane voussoir is used for the residual stress measuring method of curve surface work pieces |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109341912B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112730614A (en) * | 2020-12-22 | 2021-04-30 | 中冶建筑研究总院有限公司 | Surface ultrasonic device and method for detecting prestress value |
| CN112903820A (en) * | 2021-01-16 | 2021-06-04 | 大连理工大学 | Critical refraction longitudinal wave multi-material detection system based on single-angle wedge block and sound velocity measurement method thereof |
| CN115855333A (en) * | 2022-12-21 | 2023-03-28 | 北京工研精机股份有限公司 | Surface stress distribution cloud picture construction method based on critical refraction longitudinal wave detection |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0787980A2 (en) * | 1996-01-30 | 1997-08-06 | THE BABCOCK & WILCOX COMPANY | Measuring a load on a part and monitoring the integrity of the part |
| CN102879137A (en) * | 2012-10-10 | 2013-01-16 | 北京理工大学 | Flexible fixing device for residual stress detection |
| CN104142195A (en) * | 2014-04-30 | 2014-11-12 | 李祚华 | Device and method for detecting interior initial stress of steel structural member based on ultrasonic method |
| CN105004789A (en) * | 2015-07-13 | 2015-10-28 | 四川广正科技有限公司 | Error correction method of welding residual stress ultrasonic measurement |
| CN105158342A (en) * | 2015-09-18 | 2015-12-16 | 中国航空工业集团公司北京航空材料研究院 | Method for ultrasonic water immersion nondestructive evaluation of residual stress |
| CN105300578A (en) * | 2015-11-20 | 2016-02-03 | 西南交通大学 | Ultrasonic-wave stress detection device capable of adjusting acoustic beam angle and test area |
| CN205484211U (en) * | 2016-03-31 | 2016-08-17 | 西南交通大学 | Ultrasonic wave residual stress test instrument |
| CN106679872A (en) * | 2017-01-25 | 2017-05-17 | 大连理工大学 | Surface residual stress ultrasonic detection method capable of achieving direct coupling wave generation |
| CN106802202A (en) * | 2017-03-15 | 2017-06-06 | 哈尔滨工业大学 | A kind of method for measuring anisotropic material plane stress |
| CN106813819A (en) * | 2017-04-05 | 2017-06-09 | 西南交通大学 | A kind of method that supercritical ultrasonics technology measures curve surface work pieces residual stress |
| CN206593789U (en) * | 2017-02-28 | 2017-10-27 | 西南交通大学 | Ultrasonic wave residual stress test coupling device |
-
2018
- 2018-11-13 CN CN201811344484.6A patent/CN109341912B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0787980A2 (en) * | 1996-01-30 | 1997-08-06 | THE BABCOCK & WILCOX COMPANY | Measuring a load on a part and monitoring the integrity of the part |
| CN102879137A (en) * | 2012-10-10 | 2013-01-16 | 北京理工大学 | Flexible fixing device for residual stress detection |
| CN104142195A (en) * | 2014-04-30 | 2014-11-12 | 李祚华 | Device and method for detecting interior initial stress of steel structural member based on ultrasonic method |
| CN105004789A (en) * | 2015-07-13 | 2015-10-28 | 四川广正科技有限公司 | Error correction method of welding residual stress ultrasonic measurement |
| CN105158342A (en) * | 2015-09-18 | 2015-12-16 | 中国航空工业集团公司北京航空材料研究院 | Method for ultrasonic water immersion nondestructive evaluation of residual stress |
| CN105300578A (en) * | 2015-11-20 | 2016-02-03 | 西南交通大学 | Ultrasonic-wave stress detection device capable of adjusting acoustic beam angle and test area |
| CN205484211U (en) * | 2016-03-31 | 2016-08-17 | 西南交通大学 | Ultrasonic wave residual stress test instrument |
| CN106679872A (en) * | 2017-01-25 | 2017-05-17 | 大连理工大学 | Surface residual stress ultrasonic detection method capable of achieving direct coupling wave generation |
| CN206593789U (en) * | 2017-02-28 | 2017-10-27 | 西南交通大学 | Ultrasonic wave residual stress test coupling device |
| CN106802202A (en) * | 2017-03-15 | 2017-06-06 | 哈尔滨工业大学 | A kind of method for measuring anisotropic material plane stress |
| CN106813819A (en) * | 2017-04-05 | 2017-06-09 | 西南交通大学 | A kind of method that supercritical ultrasonics technology measures curve surface work pieces residual stress |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112730614A (en) * | 2020-12-22 | 2021-04-30 | 中冶建筑研究总院有限公司 | Surface ultrasonic device and method for detecting prestress value |
| CN112903820A (en) * | 2021-01-16 | 2021-06-04 | 大连理工大学 | Critical refraction longitudinal wave multi-material detection system based on single-angle wedge block and sound velocity measurement method thereof |
| CN112903820B (en) * | 2021-01-16 | 2022-03-25 | 大连理工大学 | Critical refraction longitudinal wave multi-material detection system based on single-angle wedge block and sound velocity measurement method thereof |
| WO2022151530A1 (en) * | 2021-01-16 | 2022-07-21 | 大连理工大学 | System for detecting multiple materials by using longitudinal critically refracted waves based on single-angle wedge block and method for measuring sound velocity thereof |
| US11635409B2 (en) | 2021-01-16 | 2023-04-25 | Dalian University Of Technology | Multi-material inspection system and velocity measurement method of critically refracted longitudinal wave based on single-angle wedges |
| CN115855333A (en) * | 2022-12-21 | 2023-03-28 | 北京工研精机股份有限公司 | Surface stress distribution cloud picture construction method based on critical refraction longitudinal wave detection |
| CN115855333B (en) * | 2022-12-21 | 2023-08-25 | 北京工研精机股份有限公司 | Surface stress distribution cloud picture construction method based on critical refraction longitudinal wave detection |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109341912B (en) | 2019-11-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4658649A (en) | Ultrasonic method and device for detecting and measuring defects in metal media | |
| Mariani et al. | Location specific temperature compensation of guided wave signals in structural health monitoring | |
| CN109341912B (en) | A kind of ultrasonic wave plane voussoir is used for the residual stress measuring method of curve surface work pieces | |
| US9366653B2 (en) | Graphical user interface re wear monitoring | |
| US5661241A (en) | Ultrasonic technique for measuring the thickness of cladding on the inside surface of vessels from the outside diameter surface | |
| CN105954356B (en) | A kind of metal block closure crack detection localization method based on limited amplitude method | |
| US7237438B1 (en) | Systems and methods for determining the velocity of ultrasonic surface skimming longitudinal waves on various materials | |
| CN103808806A (en) | Ultrasonic non-destructive testing method for measuring circumference residual stress at gear root | |
| CN107167273B (en) | High-strength bolt connecting node plate compaction degree detection method based on ultrasonic echo | |
| CN104764803A (en) | Material stress detection technology based on changes of wavelength of supersonic waves | |
| CN109307568A (en) | The lossless detection method of welding residual stress and the probe for using this method | |
| CN101949894A (en) | Method for detecting interface contact strength by double frequency ultrasound | |
| Liu et al. | Measurement of fastening force using dry-coupled ultrasonic waves | |
| CN107490446B (en) | Ultrasonic nondestructive testing method for stress of high-speed rail wheel pair tread | |
| Kamyshev et al. | Measurement of the residual stresses in the treads of railway wheels by the acoustoelasticity method | |
| CN104267103A (en) | Wafer type ultrasonic non-destructive testing probe for low-modulus gear root residual stress | |
| WO2021057288A1 (en) | Pipe creep measurement system and method | |
| CN103063171A (en) | Method for measuring wall thickness of workpiece | |
| Draudvilienė et al. | Validation of dispersion curve reconstruction techniques for the A0 and S0 modes of Lamb waves | |
| CN1587943A (en) | Nondestructive pressure testing method and its device based on Rayleigh surface wave | |
| JP2021103100A (en) | Delamination inspection method and delamination inspection device for laminated body | |
| RU94006935A (en) | ACOUSTIC METHOD FOR MEASURING INTERNAL MECHANICAL STRESSES WITHOUT USING THE STANDARDS | |
| EP1850126B1 (en) | Systems and methods for determining the velocity of ultrasonic surface skimming longitudinal waves on various materials | |
| Bagheri et al. | A Novel Method for Ultrasonic Evaluation of Horizontal Defects Using Time-of-Flight Diffraction | |
| CA2544464A1 (en) | Ultrasonic determination of crystal grain orientation systems and methods for determining the velocity of ultrasonic surface skimming longitudinal waves on various materials |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230308 Address after: No. N0142, Floor 1, Building 37, No. 15, Haijiao Street, Jinjiang District, Chengdu, Sichuan Province, 610000 (self-numbered) Patentee after: Sichuan Zhongchuang Chen'an Testing Technology Co.,Ltd. Address before: 610031 No. two, section 111, ring road, Chengdu, Sichuan, China Patentee before: SOUTHWEST JIAOTONG University |