Kev tshawb nrhiav txoj hauv kev rau kev debonding ntawm cov hlau sib xyaw phaj feem ntau suav nrog eddy tam sim no thermal imaging detection, radiographic detection, thiab ultrasonic nrhiav. Ultrasonic kuaj tshuab tau dhau los ua txoj kev siv ntau tshaj plaws hauv kev sim tsis muaj kev puas tsuaj vim nws muaj peev xwm nkag mus tau zoo, kev ua haujlwm nyab xeeb, thiab kev siv tau yooj yim. Lub detachment ua rau discontinuity nyob rau hauv lub ultrasonic propagation txoj kev, ua rau muaj kev xav thiab thaiv kev sib kis, uas yuav raug txheeb xyuas los ntawm cov yam ntxwv teeb liab. Rau cov phaj sib xyaw nrog cov txheej txheem ntawm cov hlau, cov khoom sib xyaw ntawm titanium, thiab tag nrho cov tuab ntau dua 4 hli, GB / T 8547-2019 [6] kuj tseem hais txog kev siv cov tsoos piezoelectric sojntsuam txhawm rau txheeb xyuas thaj chaw uas tsis muaj kev sib raug zoo siv cov kev cuam tshuam tsis zoo, tab sis yuav tsum tau zoo acoustic coupling ntawm lub transducer thiab cov phaj sib xyaw. Laser ultrasound, raws li ib tug tsis sib cuag excitation technology, yog nce nyiam los ntawm cov neeg. Xia Jia et al. kuaj hlau lead siv laser excitation laser txais tos txoj kev.
Txuas cov qauv. Janovsk thiab al. siv ultrasonic resonance spectroscopy los ntsuas qhov kev sib raug zoo ntawm laser txias tsuag txheej. Chen Chu et al. siv hluavtaws aperture tsom rau kev yees duab thev naus laus zis raws li theem hloov mus kuaj xyuas qhov tsis xws luag. Txawm li cas los xij, cov tshuab txais kho qhov muag tau koom nrog hauv txhua qhov kev sim, thiab cov txiaj ntsig tshawb pom tau yooj yim cuam tshuam los ntawm qhov roughness ntawm lub workpiece thiab ib puag ncig lub suab nrov. Txhawm rau kov yeej cov teeb meem saum toj no, ib txoj kev tshawb nrhiav tsis sib cuag, uas siv cov laser pulsed los ua kom muaj zog broadband ultrasonic tsis thiab siv electromagnetic ultrasonic transducers kom tau txais cov cim.
Qhov zoo ntawm qhov chaw sib txuas ncaj qha cuam tshuam rau tag nrho lub zog ntawm titanium steel composite daim hlau. Txhawm rau ntsuas qhov ua tau zoo ntawm cov nplaum, lub laser electromagnetic ultrasonic tsis tiv tauj cov tswv yim rau kev debonding tsis xws luag tau thov. Raws li lub hauv paus ntsiab lus ntawm laser ultrasonic excitation, longitudinal yoj acoustic teb directionality, thiab electromagnetic ultrasonic txais kev xav, ib tug titanium steel puas phaj debonding defect nrhiav kom tau qhov system. Nyob rau sab substrate los yog sab sib xyaw, ib lub tshuab nqus laser linear qhov chaw nrog qhov ntev ntawm 10mm thiab dav ntawm 0.2mm yog siv los irradiate saum npoo ntawm cov khoom kom excite ultrasonic tsis. Ib lub tshuab hluav taws xob ultrasonic longitudinal yoj transducer nrog qhov nruab nrab zaus ntawm 1MHz yog siv los txais cov teeb liab ntawm qhov chaw sib txawv ntawm sab nraud. Kev hloov pauv txoj cai ntawm lub teeb liab amplitude thaum lub sij hawm tus txheeb ze debonding defect txav ntawm lub ntsiab lub suab beam thiab lub transducer tau tshawb. Raws li kev sim cov ntaub ntawv, nws tuaj yeem pom tias qhov ntev ntawm cov transducer raug cuam tshuam los ntawm qhov tsis xws luag nce, lub teeb liab amplitude maj mam txo. Thaum lub suab tseem ceeb thiab cov transducer yog ib feem cuam tshuam, lub teeb liab amplitude txo mus rau 0.5 npaug ntawm lub xeev zoo. Yog li ntawd, debonding qhov tsis xws luag tuaj yeem txiav txim siab raws li cov yam ntxwv ntawm cov teeb liab amplitude hloov pauv, thiab nws kuj qhia tau tias laser electromagnetic ultrasound tshuab yog tsim rau kev tsis sib cuag ntawm qhov sib txuas ntawm titanium steel composite daim hlau.
Txhawm rau ua kom tau raws li qhov tsis sib cuag tsis muaj kev puas tsuaj rau qhov kev sib txuas ntawm qhov zoo ntawm titanium steel puas daim hlau, daim ntawv no tau tshaj tawm cov mem tes laser excitation electromagnetic ultrasonic transducer.
Lub tswv yim nrhiav kom tau txais lub zog. Sib tham txog txoj cai excitation thiab longitudinal yoj acoustic teb directionality ntawm laser ultrasound nyob rau hauv ablation mechanism, thiab soj ntsuam cov longitudinal electromagnetic ultrasound.
Cov qauv ntawm lub cev tseem ceeb ntawm yoj transducer thiab txoj kev xav ntawm kev txais tos ultrasonic tau piav qhia, thiab cov txheej txheem thiab txheej txheem rau kev debonding nrhiav pom ntawm titanium steel puas phaj yog muab. Kev siv theoretical tsom xam.
Kev hloov pauv txoj cai ntawm cov teeb liab thaum lub sij hawm txav ntawm qhov tsis xws luag ntawm lub axis ntawm lub suab beam tau kawm los ntawm kev tshawb nrhiav kev sim, thiab cov txiaj ntsig tau pom tias qhov attenuation ntawm lub teeb liab amplitude sib txawv nrog occlusion.
Raws li qhov ntev nce, nws ntxiv dag zog. Thaum lub amplitude txo mus rau 1/2 ntawm tus nqi siv, cov kab txuas ntawm qhov chaw ntawm lub teeb thiab qhov chaw ntawm lub transducer yog qhov tsis xws luag. Zuag qhia tag nrho, txoj kev ntsuas ntawm pulse laser excitation ultrasonic electromagnetic ultrasonic longitudinal yoj transducer tau txais cov teeb liab yog rhiab rau debonding qhov tsis xws luag thiab tuaj yeem txheeb xyuas qhov tsis xws ntawm ciam teb, ua rau nws yog ib txoj hauv kev zoo rau kev ntsuas kev sib raug zoo ntawm titanium steel composite daim hlau.
