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Journal articles on the topic 'Ultrasonic test'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Park, Kyung Hee, Yun Hyuck Hong, Kyeong Tae Kim, Seok Woo Lee, Hon Jong Choi, and Young Jae Choi. "Ultrasonic Vibration Effect in Grinding of Ceramic (Al₂O₃)." Advanced Materials Research 875-877 (February 2014): 820–27. http://dx.doi.org/10.4028/www.scientific.net/amr.875-877.820.

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In this work, machining test was carried out in various machining conditions using ultrasonical vibration capable CNC machine. For work material, alumina ceramic (Al2O3) was used while for tool material diamond electroplated grinding wheel was used. To evaluate ultrasonical vibration effect, grinding test was performed with and without ultrasonic vibration in same machining condition. In ultrasonic mode, ultrasonic vibration of 20kHz was generated by HSK 63 ultrasonic actuator. On the other hand, grinding forces were measured by KISTLER dynamometer. And an optimal sampling rate for grinding force measurement was obtained by a signal processing and frequency analysis. The surface roughness of the ceramic was also measured using stylus type surface roughness instrument and atomic force microscope (AFM). Besides, the scanning electron microscope (SEM) was used for observation of surface integrarity.

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2

Sunariyati, Neny Kurniawati, Kerelius,, Luqman Hakim, Dyah Ayu Pramoda Wardani, Widya Krestina, and Dwi Tyas Setiawan, Ferry Purwanto, Diah K. Fatmala. "Pengaruh Variasi Waktu Paparan Gelombang Ultrasonik dalam Mengurangi Jumlah Bakteri coliform pada Sampel Air Sungai Kahayan." Risalah Fisika 4, no. 1 (July 14, 2020): 9–13. http://dx.doi.org/10.35895/rf.v4i1.168.

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Abstrak – Penelitian ini bertujuan untuk mengkaji pengaruh waktu paparan gelombang ultrasonik terhadap pengurangan jumlah koloni bakteri coliform pada sampel air sungai Kahayan. Pengambilan sampel air sungai dilakukan dengan teknik Grab Sampling menggunakan alat Kemmerer Sampler. Sampel air yang didapatkan diberikan paparan gelombang ultrasonik secara langsung, tanpa merubah kondisi lingkungan awal. Waktu paparan divariasikan pada 1 jam, 2 jam, 3 jam, 4 jam, dan 5 jam dengan frekuensi 40 kHz untuk memperoleh data waktu optimum. Uji coliform dilakukan dengan metode MPN, dengan tahapan uji pendugaan, uji penegasan, dan perhitungan koloni. Hasil uji MPN 24 jam setelah paparan menunjukkan bahwa penggunaan ultrasonik sebagai antibateri dapat optimum ketika diberikan paparan dengan waktu 3 jam, dengan efisiensi 96%. Kata kunci: antibakteri, coliform, ultrasonik, water treatment, sungai Kahayan Abstract – This study aims to examine the effect of ultrasonic wave exposure time on reducing the number of coliform bacterial colonies in the Kahayan river water samples. River water sampling is done using the Grab Sampling technique using the Kemmerer Sampler tool. The water samples obtained were given direct ultrasonic wave exposure, without changing the initial environmental conditions. The exposure time is varied in 1 hour, 2 hours, 3 hours, 4 hours and 5 hours with a frequency of 40 kHz to obtain optimum time data. Coliform test was carried out by the MPN method, with the stages of the estimation test, affirmation test, and colony calculation. The MPN test results 24 hours after exposure showed that the use of ultrasonic as an antibody can be optimum when given exposure with a time of 3 hours, with an efficiency of 96%.Keywords : antibakterial, coliform, ultrasonic, water treatment, Kahayan river

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3

Hu, Jun, Tetsuhide Shimizu, and Ming Yang. "Investigation on Dynamic Impact Effect of Ultrasonic-Assisted Compression Test." Materials Science Forum 920 (April 2018): 102–7. http://dx.doi.org/10.4028/www.scientific.net/msf.920.102.

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Ultrasonic-assisted metal forming have been studied numerously in conventional macro scale. However, ultrasonic dynamic impact effect, occurring in micro scale, has never been studied thoroughly, which makes the characteristics of material deformation more unpredictable in ultrasonic-assisted micro forming. The purpose of this study is to confirm the critical condition for occurrence of ultrasonic dynamic impact effect and to investigate the dimensional height dependency of ultrasonic dynamic impact effect on material deformation. In this paper, commercially pure aluminum 1100 with varying height (φ2×2mm, φ2×1.5mm, φ2×1mm) were selected for conventional static (without ultrasonic vibration) and ultrasonic-assisted compression tests. Ultrasonic-induced stress reduction was evaluated and the contour shape of deformed specimens was compared to investigate the ultrasonic dynamic impact effect on material deformation. The results showed that, as dimensional height of specimen decreased, ultrasonic vibration can reduce forming stress more effectively. In addition, a surprising anti-barreling shape and a significant contact surface area expansion were observed near contact surfaces in every specimen compressed with ultrasonic-assistance, indicating that additional plastic deformation can be produced by ultrasonic dynamic impact effect. An ultrasonic dynamic impact factor (y) is proposed and estimated by an exponential type trend line as y = 2.42e-1.48x for different dimensional specimen height (x) to quantify the ultrasonic dynamic impact effect. The promising prospect of ultrasonic vibration in micro-forming was demonstrated by the findings above, which helped to provide a basis to understand the underlying mechanism of ultrasonic-assisted micro forming and design the process in the future.

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4

Advatec. "Ultrasonic test blocks with micro holes." NDT International 23, no. 1 (February 1990): 57. http://dx.doi.org/10.1016/0308-9126(90)91590-p.

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5

Advatec. "Ultrasonic test blocks with micro holes." NDT & E International 23, no. 1 (February 1990): 57. http://dx.doi.org/10.1016/0963-8695(90)90854-c.

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6

Ongpeng, Jason Maximino C., Andres Winston C. Oreta, and Sohichi Hirose. "Contact and Noncontact Ultrasonic Nondestructive Test in Reinforced Concrete Beam." Advances in Civil Engineering 2018 (November 1, 2018): 1–10. http://dx.doi.org/10.1155/2018/5783175.

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Contact-type ultrasonic test is commonly used in construction industry where gel-couplant is applied to the material being tested and the transducers to assure that wave propagation will travel through without any air gaps. However, this method has disadvantages, since surface preparation is considered prior to testing. Another method of testing without the worry of air gaps that causes scattering of waves before it reaches the medium is the use of the noncontact ultrasonic test. In particular, the air-coupled ultrasonic test is done in this paper for reinforced concrete beams. Sixteen plain concrete cube specimens under the compression test and six reinforced concrete beam specimens under the four-point bending test are made with water-cement ratio of 40% and 60%. The plain concrete cubes are investigated to establish the relationship of the contact ultrasonic test and load. Added parameters are considered to investigate the sensitivity of the contact and noncontact ultrasonic test in reinforced concrete beams. These are ultrasonic wave path and the neutral axis index. It shows that the higher water-cement ratio produces good sensitivity in the noncontact ultrasonic test, since it produces more cracks on the tension face. Lower water-cement ratio gives good sensitivity with load for the contact ultrasonic test, since it has its ultrasonic wave path passing through the concrete experiencing compression. In addition, the neutral axis index for a member subjected to bending is an important factor in assessing the sensitivity of both contact and noncontact ultrasonic test.

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7

Li, Ling, Yun Jiang Miao, Zhong Bin Wang, and Xiong Bing Li. "Kinematics Modeling on CFRP Curved Part Ultrasonic Test." Advanced Materials Research 186 (January 2011): 136–40. http://dx.doi.org/10.4028/www.scientific.net/amr.186.136.

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Aimed at inner flaw in CFRP（carbon fiber reinforced plastic）curved part, build the ultrasonic test technological process. Based on five-freedom CFRP curved part robot, the mechanics structure model is set up. And then, by basic principle of robot kinematics, the kinematics equation of five-freedom ultrasonic test system is derived. Finally, through solving the direct root and converse root, the mathematics relation expression between the movement variable of servo motors and ultrasonic probe coordinate is obtained.

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8

Kurama, Semra, and Elif Eren Gültekin. "Characterization of Silicate Ceramics Using Ultrasonics Test Method." Advances in Science and Technology 92 (October 2014): 194–202. http://dx.doi.org/10.4028/www.scientific.net/ast.92.194.

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Non-destructive testing techniques are widely used for testing ceramic materials. In our studies, two different types of ultrasonic test methods (A-scan and C-Scan) were investigated as non-destructive testing methods for characterization of porcelain tiles. Tiles were sintered in different temperatures to change their porosity and density properties. By changing of ultrasonic time and velocity related with samples’ some physical properties (such as bulk density, apparent density, apparent porosity (%), water absorption (%)) inspected via contact A-scan ultrasonic test method. The results show that without necessity of traditional test methods, some physical properties of ceramics can be determined by using obtained ultrasonic velocity-bulk density, apparent density, apparent porosity (%) and water absorption (%) calibration plots. Additionally, various defects were inspected in samples by using water immersion ultrasonic C-scan method. These results supported this study to obtain the information about defects’ size and place in the ceramic tiles. To support this non-destructive method results scanning electron microscope (SEM) characterization was done and images give the information about the place of the defect.

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9

Wu, Jin Rong. "Fatigue Test of Asphalt Mixture and Ultrasonic Forecast." Advanced Materials Research 168-170 (December 2010): 488–91. http://dx.doi.org/10.4028/www.scientific.net/amr.168-170.488.

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The fatigue behavior of the asphalt mixtures beams is experimented by sine wave load, and the fatigue life is predicted by ultrasonic ware theories. Test results show that ultrasonic ware can reflect better fatigue process, and it is an effective method to analyze and forecast fatigue property.

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10

Linggasari, Dewi. "MEMPERKIRAKAN KEDALAM RETAK PADA BETON MENGGUNAKAN GELOMBANG ULTRASONIK." Jurnal Muara Sains, Teknologi, Kedokteran dan Ilmu Kesehatan 3, no. 1 (October 2, 2019): 145. http://dx.doi.org/10.24912/jmstkik.v3i1.3912.

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Tulisan ini mendiskusikan penggunaan gelombang ultrasonik untuk memperkirakan kedalaman retak terbuka. Teknik yang digunakan sangat berguna dalam pekerjaan di lapangan. Metode pengukuran menggunakan dua metode acuan yaitu standard BS 1881 bagian 203 sebagai metode 1 dan manual buku pada alat PUNDIT CNS Electronics sebagai metode ke 2, dengan gambaran persamaan matematika untuk menentukan kedalaman retak terbuka. Gelombang ultrasonik bekerja didasarkan pada pengukuran waktu tempuh gelombang ultrasonik yang menjalar dalam struktur beton. Gelombang ultrasonik disalurkan dari pengirim yang ditempatkan dipermukaan beton melalui material beton menuju penerima dan waktu tempuh gelombang tersebut diukur oleh Read-Out unit dalam mikro detik. Sejumlah balok uji disiapkan dengan penandaan arah keretakan untuk pengukuran. Hasil pengujian menunjukkan kedua metode yang digunakan untuk mengukur kedalaman keretakan memiliki kesesuain hasil antar satu terhadap yang lainnya. This paper discusses the use of ultrasonic waves to estimate the depth of open cracks. The technique used is very useful in work in the field. The measurement method uses two reference methods namely standard BS 1881 section 203 as method 1 and the book manual on the PUNDIT CNS Electronics tool as the second method, with an overview of mathematical equations to determine the depth of open cracks. Ultrasonic waves work based on measurements of the travel time of ultrasonic waves that propagate in concrete structures. Ultrasonic waves are transmitted from the sender placed on the concrete surface through concrete material to the receiver and the wave travel time is measured by the Read-Out unit in micro seconds. A number of test beams were prepared by marking the direction of the crack for measurement. The test results show that the two methods used to measure the depth of the crack have the suitability of the results between one another.

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11

Kim, Chang Hyun, Jae Yeol Kim, Kyung Seok Song, and Yong Hoon Cha. "Application of Ultrasonic Test System for Test Performance Improvement of Welding Flaw." Key Engineering Materials 321-323 (October 2006): 1517–21. http://dx.doi.org/10.4028/www.scientific.net/kem.321-323.1517.

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In this research, we used nondestructive test based on ultrasonic test as inspection method, and made up inspection robot in order to control of ultrasonic probe on the SWP surface, and programmed to signal processing code and pattern classifying code by user made programming code. For evaluation of flaw signal is reflected on welding flaw, user-made program codes are composed of signal processing and probability neural network (PNN) and backpropagation neural network (BPNN). And then, we actually confirmed to the theoretical advantage of each neural network method compared probability neural network with backpropagation neural network for classification and recognition rate. For the application of classifier to SWP inspection system, BPNN classifier is adequate in the first stage. And then, the application of PNN classifier is adequate as the next stage. Because of PNN application need enough sample data that is due to probabilistic density function.

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12

ZHU, Xijing. "Analysis of Power Ultrasonic Honing Cavitation Test." Journal of Mechanical Engineering 53, no. 19 (2017): 136. http://dx.doi.org/10.3901/jme.2017.19.136.

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13

DUN Yi, 敦怡, 师小红 SHI Xiao-hong, 王广龙 WANG Guang-long, and 周兆英 ZHOU Zhao-ying. "Nonlinear ultrasonic test of micro-nano crack." Optics and Precision Engineering 19, no. 1 (2011): 132–37. http://dx.doi.org/10.3788/ope.20111901.0132.

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14

Kim, Jae Woo, Da Hee Cho, Gwang Ju Jang, Joong Cheul Park, Yeong Cheol Lee, Byeong Choon Goo, and In Sik Cho. "Guidelines for Standardization of Ultrasonic Fatigue Test." Transactions of the KSME C Industrial Technology and Innovation 6, no. 2 (September 30, 2018): 85–94. http://dx.doi.org/10.3795/ksme-c.2018.6.2.085.

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15

Johnson, C. H., E. A. Druschitz, and A. P. Druschitz. "Ultrasonic Leak Test for Automotive Brake Caliper." Materials Science Forum 539-543 (March 2007): 429–32. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.429.

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Leak path defects in brake caliper castings were observed and an efficient method of detecting them was needed. The standard detection technique used a differential decay method at pressures up to 1000 psi but this technique could not detect all of the leak path defects. The only known method that could detect all of the leak path defects was a technique that used brake fluid, and required pressures up to 3,000 psi. Because a fluid medium used to conduct this test, regulations precluded the calipers from being used on a vehicle after the inspection process. This was the motivation for a Capstone Project in the Mechanical Engineering Technology Program at Central Washington University. For safety and economic reasons, a nondestructive test which utilized acoustics was chosen. It was decided that the main focus for this project would be the design of the fixture. The prototype fixture was designed to utilize a toggle clamp and a backing plate (manifold) with O-rings. The clamping system was produced at INTERMET Corporation. After the fixture was completed it was sent to Central Washington University. To verify predictions, strain gauges were used at different parts of the system during normal use. Then the placement of the acoustic listener was determined, completing the test fixture. In order to obtain a good seal (O-ring to cavity lip) the fixture required deflections less then .0045” (as determined by tolerance stacking and O-ring deformation requirements). A magnetic pin gauge was used to measure this displacement as it the fixture was pressurized to 82psi (available shop pressure). To demonstrate the safety of the device, a strain gauge was mounted on the backing plate to measure the force being counteracted by the toggle clamp. The maximum stress on the backing plate was approximately 10% of the material's yield strength (~ 36 ksi for A36 steel); producing a safety factor of about 10. No more than 3750 psi was measured. The maximum strain of the backing plate was 0.003 in/in. Upon completion, the fixture was sent back to INTERMET Corporation where a production model was designed and implemented.

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16

Brosey, W. D. "Ultrasonic analysis of spherical composite test specimens." Composites Science and Technology 24, no. 3 (January 1985): 161–78. http://dx.doi.org/10.1016/0266-3538(85)90071-5.

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17

Ermolov, I. N. "How I test an ultrasonic flaw detector." Russian Journal of Nondestructive Testing 36, no. 3 (March 2000): 237–39. http://dx.doi.org/10.1007/bf02759336.

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18

Roccella, Selanna, Andrea Reale, Angelo Tatì, Eliseo Visca, Massimiliano Palermo, and Pierre Gavila. "ENEA ultrasonic test on plasma facing units." Fusion Engineering and Design 146 (September 2019): 2356–60. http://dx.doi.org/10.1016/j.fusengdes.2019.03.189.

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19

Wang, Jiang Ping, and Teng Fei Duan. "Fault Diagnosis with Mult-Signal Test for Reciprocating Compressor." Applied Mechanics and Materials 741 (March 2015): 294–97. http://dx.doi.org/10.4028/www.scientific.net/amm.741.294.

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High frequency vibration signal, cylinder-inside pressure and ultrasonic wave are monitored under working condition of a reciprocating compressor. High frequency vibration signal and ultrasonic wave are processed using high frequency band-pass filtering, and then enveloped. The pressure signal is filtered with a low-pass digital filter. The fault causes of the machine can be determined by the enveloped waveform of vibration signal and ultrasonic wave, as well as the pressure curve comprehensively. We can confirm the truth that this fault diagnosis method is accurate and reliable for reciprocating compressors through a number of the results of fault diagnosis.

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20

Saikrishna, U., K. Srinivas, and Y. L. V. D. Prasad. "Development of Guided Wave Ultrasonic Inspection Method for Thick Composite Structures." Applied Mechanics and Materials 592-594 (July 2014): 153–57. http://dx.doi.org/10.4028/www.scientific.net/amm.592-594.153.

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Ultrasonic Non-destructive testing is a well known technique for inspecting fiber reinforced composite structures however; its capability is severely limited by the high attenuation in thick and multi layer structures. Guided wave ultrasonic inspection has been reported to be useful tool for quantitative identification of composite structures. It takes advantage of tailoring / generating desired ultrasonic wave modes (Symmetric and anti-symmetric) for improved transmission through the composite structure. For this, guided waves have to be generated selectively by precisely placing transducer at an angle to the test surface. Automation of two axis fixture for transmission and reception of transducers have to be used for avoiding manual errors. The captured signals have to be processed in order to extract useful information from the received ultrasonic signals. The proposed project aims at developing automated guided wave inspection methods along with digital signal processing for generating dispersion curves for thick composited. Using test laminates with implanted defects, methodology for thick composite inspection with guided wave ultrasonic’s will be established. For this data will be captured and analyzed using Labview software.

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21

Guo, Bei Tao. "Application of Adaptive Fuzzy Filter in Ultrasonic Test System." Advanced Materials Research 712-715 (June 2013): 1970–73. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.1970.

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In order to avoid some shortcomings such as poor accuracy and low signal-to-noise ration, an ultrasonic test system based on automatic and intelligent testing are introduced. After ultrasonic signal is transmitted and received; data processing, data saving and curve displaying are performed in this test system. To solve the problem of extracting the weak ultrasonic signals from the strong noise, an adaptive filter based on least-mean-square (LMS) algorithm is designed. The convergence factor of the algorithm is chose according adaptive fuzzy control rule. Experimental results show that the filter can inhibit the noise and extract the weak signals more effectively. It also can improve the robustness, convergence speed and detecting accuracy.

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22

Zhu, X. J., Yan Xia Gao, Q. Chen, J. Q. Wang, and Zhi Meng Lu. "Test Research on the Optimizing Technological Parameters of the Ultrasonic Vibration Honing." Advanced Materials Research 53-54 (July 2008): 185–90. http://dx.doi.org/10.4028/www.scientific.net/amr.53-54.185.

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The contrast experiments between ultrasonic vibration honing and ordinary honing are firstly taken. It shows that the removal rates and the working accuracy of ultrasonic honing are much better than that of the ordinary honing. Then the optimum experiments on technological parameters of ultrasonic vibration honing on engine cylinder is taken, which gained the proper technological parameters. The experimental results indicate that the gained parameter totally meets the actual need and reaches a new height in this field, which provides the reliable technological parameter for the ultrasonic vibration honing to process cylinder and has a broad application in prospect.

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23

Pani, Luisa, and Lorena Francesconi. "Ultrasonic Test on Recycled Concrete: Relationship among Ultrasonic Waves Velocity, Compressive Strength and Elastic Modulus." Advanced Materials Research 894 (February 2014): 45–49. http://dx.doi.org/10.4028/www.scientific.net/amr.894.45.

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In this paper an experimental program has been carried out in order to compare compressive strength fcand elastic static modulus Ecof recycled concrete with ultrasonic waves velocity Vp, to establish the possibility of employing nondestructive ultrasonic tests to qualify recycled concrete. 9 mix of concrete with different substitution percentage of recycled aggregates instead of natural ones and 27 cylindrical samples have been made. At first ultrasonic tests have been carried out on cylindrical samples, later elastic static modulus Ecand compressive strength fchave been experimentally evaluated. The dynamic elastic modulus Edhas been determined in function of ultrasonic wave velocity Vp; furthermore the correlations among Ed, Ec, fce Vphave been determined. It has been demonstrated that ultrasonic tests are suitable for evaluating different deformative and resisting concrete performances even when variations are small.

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24

Zhang, Ming, Yu Qing Wang, and Feng Jiao. "Ultrasonic Characteristics of the Ultrasonic Grinding Process about the Nano-Ceramic Plate." Advanced Materials Research 418-420 (December 2011): 1690–93. http://dx.doi.org/10.4028/www.scientific.net/amr.418-420.1690.

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In this paper, the sand vibration test of the ultrasonic wave is done under ultrasonic vibration grinding. In this test, the "skin effect"is observed when the ultrasonic waves pass to the nano-ceramic plate, which is amplified by the ultrasonic horn. This phenomenon is analyzed by the second-order surface wave theory and the waves which pass to the workpiece are surface waves generated. These explain the good grinding surface quality and high efficiency under the two-dimensional ultrasonic grinding in the same conditions.

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25

Chen, Xiao Hong, Wei Hong Xuan, and Yu Zhi Chen. "Ultrasonic Test Analysis of Impact Damage of Polypropylene Fiber Mortar." Applied Mechanics and Materials 271-272 (December 2012): 324–28. http://dx.doi.org/10.4028/www.scientific.net/amm.271-272.324.

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The method recommended by ACI Committee 544 was used in this paper. Drop hammer impact tests based on mortar specimens with different contents of polypropylene fiber were carried out. The Ultrasonic test is done before and after impacting. Under different drop hammer impact times, polypropylene fiber mortar specimens' damage degree was evaluate based on ultrasonic velocity. The results show that the hammering number corresponding to the impact fracture of polypropylene fiber mortar is more than ordinary mortar. The ultrasonic velocity of all specimens decreased gradually during the process of hammering, but adding the right amount of polypropylene fibers can effectively slow down the rate of wave speed decline.

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Loan Ngo, Tu Quynh, and Yu-Ren Wang. "Using Support Vector Machine to Improve Ultrasonic Pulse Velocity Test for Concrete." MATEC Web of Conferences 207 (2018): 01001. http://dx.doi.org/10.1051/matecconf/201820701001.

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In the construction industry, to evaluate the compressive strength of concrete, destructive and non-destructive testing methods are used. Non-destructive testing methods are preferable due to the fact that those methods do not destroy concrete samples. However, they usually give larger percentage of error than using destructive tests. Among the non-destructive testing methods, the ultrasonic pulse velocity test is the popular one because it is economic and very simple in operation. Using the ultrasonic pulse velocity test gives 20% MAPE more than using destructive tests. This paper aims to improve the ultrasonic pulse velocity test results in estimating the compressive strength of concrete using the help of artificial intelligent. To establish a better prediction model for the ultrasonic pulse velocity test, data collected from 312 cylinder of concrete samples are used to develop and validate the model. The research results provide valuable information when using the ultrasonic pulse velocity tests to the inputs data in addition with support vector machine by learning algorithms, and the actual compressive strengths are set as the target output data to train the model. The results show that both MAPEs for the linear and nonlinear regression models are 11.17% and 17.66% respectively. The MAPE for the support vector machine models is 11.02%. These research results can provide valuable information when using the ultrasonic pulse velocity test to estimate the compressive strength of concrete.

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Miao, Xin Lei, and Yong Wei Zhu. "Optimal Design and Test of Ultrasonic Vibration System." Applied Mechanics and Materials 226-228 (November 2012): 21–25. http://dx.doi.org/10.4028/www.scientific.net/amm.226-228.21.

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Ultrasonic vibration system is the chief component of USM machine tool. Whether products are precisely machined is lie on the performance of the system. To design good performance of ultrasonic vibration system, finite element method is used to analyse the dynamic performance of the system based on theoretic calculation. The dynamic performance of transformer and transformer with tool is analysed respectively, including natural vibration characteristic and harmonic characteristic. The result of FEA is compared with theoretic calculation. The parametric optimization design technique of the finite element analysis package ANSYS is applied to optimize the structure dimension of the piezoelectric transducer and transformer with tool. Then amplitude of the optimized system and the previous system is compared based on laser-CCD sensor for micro-displacement. The optimized system is more superior and has larger amplitude. Last some round holes are machined on kentanium YG8, monocrystalline silicon, PZT. And machining effect of single Micro-USM is got by the test.

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28

Zhang, Qiu Ling, Guang Hong Xiao, and Xiao Yu Liu. "Study on Effectiveness of Releasing Weld Residual Stress by Ultrasonic Impact Method." Advanced Materials Research 189-193 (February 2011): 3625–28. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.3625.

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This paper presents the test of ultrasonic impact for reducing the welding residual stress. Three full-scale specimens according to the anchor connection plate of main girder with cable of the Jiangjin Yangtze River Bridge are made and the ultrasonic impact test are taken in laboratory to study the effectiveness of reducing welding residual stress. The comparison of welding residual stress before ultrasonic impact with the stress after ultrasonic impact is conducted and the results from test show that the welding residual stress can significantly be reduced over 50% by ultrasonic impact method and even some stress in weld could be changed form tensile stress into compressive stress after ultrasonic impact.

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29

Myeong, No-Jun, Seung-Wook Han, Jung-Hoon Park, and Nak-Sam Choi. "Technical Review of Specimens under Ultrasonic Fatigue Test." Transactions of the Korean Society of Mechanical Engineers A 37, no. 8 (August 1, 2013): 967–73. http://dx.doi.org/10.3795/ksme-a.2013.37.8.967.

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30

Castellano, Anna, Pilade Foti, Aguinaldo Fraddosio, Umberto Galietti, Salvatore Marzano, and Mario Daniele Piccioni. "Characterization of Material Damage by Ultrasonic Immersion Test." Procedia Engineering 109 (2015): 395–402. http://dx.doi.org/10.1016/j.proeng.2015.06.248.

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31

Gachagan, A., A. McNab, R. Blindt, M. Patrick, and C. Marriott. "A high power ultrasonic array based test cell." Ultrasonics 42, no. 1-9 (April 2004): 57–68. http://dx.doi.org/10.1016/j.ultras.2004.01.055.

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32

Yannan, Du, Zhu Xuchen, Ouyang Weiping, Tang Xiaoying, Xue Xiaolong, and Ding Ju. "Influence of Vertical Hole Defects on Ultrasonic Test." IOP Conference Series: Earth and Environmental Science 310 (September 5, 2019): 042036. http://dx.doi.org/10.1088/1755-1315/310/4/042036.

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33

YAMADA, Takeshi, Hitoshi ISHII, Hiroyasu ARAKI, and Keiichiro TOHGO. "424 Ultrasonic Bending Fatigue Test of Thin Sheets." Proceedings of Conference of Tokai Branch 2005.54 (2005): 129–30. http://dx.doi.org/10.1299/jsmetokai.2005.54.129.

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34

Niemczewski, Bogdan. "Proposal of a test procedure for ultrasonic cleaners." Transactions of the IMF 81, no. 1 (January 2003): 28–31. http://dx.doi.org/10.1080/00202967.2003.11871480.

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Kang, Gwansuk, and Min Joo Choi. "An ultrasonic moxa: its construction and feasibility test." Integrative Medicine Research 4, no. 1 (May 2015): 7. http://dx.doi.org/10.1016/j.imr.2015.04.303.

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Wang, Yulong, Xiaohong Zhang, Lili Li, Jinyang Du, and Junguo Gao. "Design of Partial Discharge Test Environment for Oil-Filled Submarine Cable Terminals and Ultrasonic Monitoring." Energies 12, no. 24 (December 14, 2019): 4774. http://dx.doi.org/10.3390/en12244774.

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Based on the principle of operating an oil-filled-cable operation and the explanation of the oil-filling process provided in the cable operation and maintenance manual of submarine cables, this study investigated oil-pressure variation caused by gas generated as a result of cable faults. First, a set of oil-filled cables and their terminal oil-filled simulation system were designed in the laboratory, and a typical oil-filled-cable fault model was established according to the common faults of oil-filled cables observed in practice. Thereafter, ultrasonic signals of partial discharge (PD) under different fault models were obtained via validation experiments, which were performed by using oil-filled-cable simulation equipment. Subsequently, the ultrasonic signal mechanism was analyzed; these signals were generated via electric, thermal, and acoustic expansion and contraction, along with electric, mechanical, and acoustic electrostriction. Finally, upon processing the 400 experimental data groups, four practical parameters—maximum amplitude of the ultrasonic signal spectrum, Dmax, maximum frequency of the ultrasonic signals, fmax, average ultrasonic signal energy, Dav, and the ultrasonic signal amplitude coefficient, M—were designed to characterize the ultrasonic signals. These parameters can be used for subsequent pattern recognition. Thus, in this study, the terminal PD of an oil-filled marine cable was monitored.

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Liu, Ze Xiang, Min Kang, and Xiu Qing Fu. "Rotary Combined Ultrasonic and Electrochemical Machining Device of Small Holes and its Test Study." Key Engineering Materials 584 (September 2013): 54–59. http://dx.doi.org/10.4028/www.scientific.net/kem.584.54.

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Discussing the technology of small holes processing and the development of the combined ultrasonic and electrochemical machining, the technology of combined ultrasonic and electrochemical Machining was studied and its device was designed. By the preliminary tests, the impacts of various factors on the processing of small holes by combined ultrasonic and electrochemical machining were analyzed and some problems were found, which provided a basis for the future research.

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Pan, Wen-hao, Xu-dong Sun, Li-mei Wu, Kai-kai Yang, and Ning Tang. "Damage Detection of Asphalt Concrete Using Piezo-Ultrasonic Wave Technology." Materials 12, no. 3 (January 31, 2019): 443. http://dx.doi.org/10.3390/ma12030443.

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Asphalt concrete has been widely used in road engineering as a surface material. Meanwhile, ultrasonic testing technology has also been developed rapidly. Aiming to evaluate the feasibility of the ultrasonic wave method, the present work reports a laboratory investigation on damage detection of asphalt concrete using piezo-ultrasonic wave technology. The gradation of AC-13 was selected and prepared based on the Marshall’s design. The ultrasonic wave velocities of samples were tested with different environmental conditions firstly. After that, the samples were destroyed into two types, one was drilled and the other was grooved. And the ultrasonic wave velocities of pretreated samples were tested again. Furthermore, the relationship between velocity and damaged process was evaluated based on three point bending test. The test results indicated that piezoelectric ultrasonic wave is a promising technology for damage detection of asphalt concrete with considerable benefits. The ultrasonic velocity decreases with the voidage increases. In a saturated water environment, the measured velocity of ultrasonic wave increased. In a dry environment (50 °C), the velocity the ultrasonic waves increased too. After two freeze-thaw cycles, the voidage increased and the ultrasonic velocity decreased gradually. After factitious damage, the wave must travel through or most likely around the damage, the ultrasonic velocity decreased. During the process of three point bending test, the ultrasonic velocity increased firstly and then decreased slowly until it entered into a steady phase. At last the velocity of ultrasonic wave decreased rapidly. In addition, the errors of the results under different test conditions need to be further studied.

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Choi, Young Jae, Kyung Hee Park, Yun Hyuck Hong, Kyeong Tae Kim, Seok Woo Lee, and Hon Jong Choi. "Design of Ultrasonic Horn for Grinding Using Finite Element Method." Advanced Materials Research 565 (September 2012): 135–41. http://dx.doi.org/10.4028/www.scientific.net/amr.565.135.

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In this paper, a ultrasonic horn, which can vibrate longitudinally with a frequency of 20㎑, was designed using finite element method (FEM). And the ultrasonic horn was fabricated for ultrasonic assisted grinding. To evaluate machining performance of the fabricated ultrasonic horn, grinding test was conducted on alumina ceramic (Al2O3). In the grinding test, grinding forces was measured and compared between the conventional grinding and the ultrasonic assisted grinding. The results showed that the grinding force in the ultrasonic grinding was lowered than the conventional grindign by 3~20%.

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Leong, Eng-Choon, Sir-Hoon Yeo, and Harianto Rahardjo. "Measurement of wave velocities and attenuation using an ultrasonic test system." Canadian Geotechnical Journal 41, no. 5 (September 1, 2004): 844–60. http://dx.doi.org/10.1139/t04-041.

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The use of ultrasonic testing to determine pulse velocities and small-strain elastic constants for rocks has been standardized in American Society for Testing and Materials (ASTM) standard D2845-95. However, the use of ultrasonic testing to determine pulse velocities and small-strain elastic constants of soils is less common, as soils have higher damping characteristics which result in measurement difficulty. The signal transmitted through soil is weak and very noisy. As a result, the signal must be properly processed to provide a reliable estimate of the wave travel time. In this paper, an ultrasonic test system consisting of compression and shear wave transducers, a pulser, and a data-acquisition system is evaluated for measurement of both compression and shear wave velocities. Among the specimens tested were fully saturated and unsaturated soil specimens. The effects of acoustic coupling and signal processing on the transmitted pulse were investigated. The strain levels associated with the determination of the wave velocities were also measured. Furthermore, a method for determining attenuation characteristics for soil specimens from the frequency spectra is suggested.Key words: laboratory, compression wave, shear wave, velocity, attenuation, ultrasonic.

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Zheng, Zhu Peng, Ying Lei, Xue Peng Cui, and Song Yu. "Non-Destructive Test of the Steel Bar by Using Piezoceramics Sheets." Advanced Materials Research 718-720 (July 2013): 692–97. http://dx.doi.org/10.4028/www.scientific.net/amr.718-720.692.

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Piezoelectric ceramics sheets are used to excite and receive ultrasonic guided waves in a steel bar. The multi-modes and disperse characteristics of guided waves within that are investigated theoretically and experimentally. The results show that ultrasonic guided waves can be generated and received by piezoelectric ceramics sheets which can be used to measure the length of the steel bar and detect the defection in it.

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Liu, Zhi Qiang, Qing Li Yang, Chu Shu Zhang, Jie Sun, Yan Zhang, and Shi Qing Wang. "Optimization of Ultrasonic Extraction Technique of Proanthocyanidin from Peanut Skin." Advanced Materials Research 156-157 (October 2010): 778–84. http://dx.doi.org/10.4028/www.scientific.net/amr.156-157.778.

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Orthogonal test method was applied to optimize the ultrasonic extraction of proanthocyanidin from peanut skin. On the basis of single factor test, the influencing factors of extraction power, temperature, time, solid-liquid ratio, ethanol concentrationultrasonic frequencies were determined by orthogonal test method with five factors and four levels in the ultrasonic frequency of 28 KHz. The results of the orthogonal test showed , the effects of five factors on ultrasonic extraction of proanthocyanidin from peanut skin were listed in the order of importance as: solid-liquid radio > ultrasonic power > time > temperature > ethanol, the optimum extraction conditions were as follows: ultrasonic output power 120W , extraction temperature 35°C, extraction time 5 min, solid-liquid ratio 1:24, ethanol concentration 55%.Under the optimum extraction, the extraction rate of proanthocyanidin was 12.1%.

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Guan, Di Jin. "The Application Research on Signal Processing Technology in Non-Destructive Test Technology." Applied Mechanics and Materials 380-384 (August 2013): 3474–78. http://dx.doi.org/10.4028/www.scientific.net/amm.380-384.3474.

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The high-precision instruments must be tested to ensure the accuracy and the normal use of the instrument in the application. Traditional detection techniques damage the instrument. So, researching for a technology which has no destruction on high precision instrument is important. This paper puts forward a new ultrasonic nondestructive test technology of precision instruments through empirical mode decomposition method of modern signal processing technology and ultrasonic nondestructive test technology. The first part describes the shortcomings of modern signal processing technology--Fourier and wavelet analysis and the advantage of empirical mode decomposition method. The second part establishes the mathematical model of ultrasonic nondestructive test technology. It also establishes empirical model to enhanced signal and noise ratio using the self-adaptivity of the empirical mode decomposition. It also extracts Intrinsic Mode Function (IMF) of ultrasonic nondestructive test technology using EMD and Hilbert transform signal processing method. Finally, it gets Nonlinear and non-steady-state frequency power spectrum which provides a reliable theoretical basis for the study of nondestructive test technology.

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Kim, Bum Joon, Byeong Soo Lim, Sung Jin Song, and Young H. Kim. "Application of Ultrasonic Test on Creep-Fatigue Life Evaluation." Key Engineering Materials 321-323 (October 2006): 476–79. http://dx.doi.org/10.4028/www.scientific.net/kem.321-323.476.

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This work investigates the relationship between the creep-fatigue life and ultrasonic test of creep-fatigue damage. Under the creep-fatigue interaction, the main cause of life reduction is the initiation and growth of microvoid with increasing hold time. The number/size of microvoid/cavity, the fraction of cavity area varied with the hold time. Therefore, the life evaluation using the microvoid with the variation of hold time is very informative for safety of components in power plants. In this study, using the heat resisting alloy, P122 steel for USC (ultra super critical) power plant, the creep-fatigue tests with various hold times and their ultrasonic inspection were carried out for the purpose of evaluation for creep-fatigue life. The results obtained by Rayleigh surface wave of backscattered ultrasound were compared and analyzed with the experimental parameters. The good agreement between the experimental life and the predicted life was obtained.

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Fransiska, F., Archadian Nuryanti, and Rini Maya Puspita. "Pengaruh Lama Paparan Gelombang Ultrasonik Frekuensi Terapi terhadap Jumlah Koloni Bakteri Streptococcus mutans." Majalah Kedokteran Gigi Indonesia 19, no. 1 (October 27, 2016): 1. http://dx.doi.org/10.22146/majkedgiind.15590.

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Latar Belakang. Gelombang Untrasonik telah digunakan untuk terapi dan diagnosis, di klinik kedokteran gigi popular digunakan untuk ultrasonik skaler. Efek termal dan nontermal gelombang ultrasonik dapat mempengaruhi lingkungan tumbuh bakteri, merusak enzim bakteri, dan struktur bakteri. Streptococcus mutans merupakan bakteri penyebab karies gigi. Tujuan penelitian. Penelitian ini bertujuan untuk mengetahui pengaruh lama paparan gelombang ultrasonik frekuensi terapi 3,5 MHz terhadap jumlah koloni bakteri Streptococcus mutans. Cara penelitian. Penelitian ini dilakukan pada 20 buah cawan petri yang berisi koloni bakteri streptococcus mutans dengan media agar darah. Dua puluh buah petri dibagi menjadi 4 kelompok yaitu kelompok kontrol (A) dan kelompok perlakuan (B, C, D). kelompok perlakuan diaplikasi gelombang ultrasonik frekuensi 3,5MHz selama 5, 10, dan 15 menit, sedangkan kelompok kontrol tidak diberi perlakuan apapun. Perhitungan jumlah koloni bakteri dilakukan dengan pengamatan menggunakan colony counter dengan standart plate count (SPC) method. Hasil penelitian jumlah koloni bakteri Streptococcus mutans dianalisis menggunakan ANAVA satu jalur menunjukkan ada perbedaan yang signifikan (p<0,05) berarti terdapat pengaruh lama paparan gelombang ultrasonik frekuensi terapi 3,5 MHz terhadap jumlah koloni bakteri Streptococcus mutans. Hasil analisis post hoc (LSD) terhadap jumlah koloni bakteri Streptococcus mutans juga menunjukkan ada perbedaan rerata antar kelompok perlawanan yang signifikan (p<0,05). Kesimpulan. Kesimpulan penelitian ini adalah lama paparan gelombang ultrasonik frekuensi terapi 3,5 MHz berpengaruh terhadap jumlah koloni bakteri Streptococcus mutans. Introduction. Ultrasonic waves have been used for therapy and diagnosis, in dental clinic ultrasonic waves are used popular for ultrasonic scaler. Thermal and non thermal effects from ultrasonic wave influence the environment of bacteria disturb bacteria enzyme and the bacteria structure. Streptococcus mutans is a bacterium that cause caries in teeth. The aim of this study was to observe the effect of duration of ultrasound in therapy frequency 3,5 MHz exposure towards Streptococcus mutans cell colony. Methods. This study was 20 petri dish with blood agar media containing the Streptococcus mutans cell colony. Twenty plates blood agar, were divided into 4 groups. Control group A was unexposed and treated group received ultrasound exposure at frecuency 3,5 MHz which for 5 minutes exposure (B), 10 minutes exposure (C) and 15 minutes exposure (D). Streptococcus mutans cell colony was countusing colony counter with standard plate count methos. Results. The results of one way ANOVA at 95o/o significance showed that duration ultrasonic therapy frecuency 3,5 MHz exposure influenced the amount of Streptococcus mutans cells colony (p<0,0,5). The post hoc test (LSD) showed the significantly mean difference (p,0,05) between groups. Conclusions. The conclusions, of this study is duration exposure ultrasonic therapy frecuency at 3,5 MHz influences on the amount of Streptococcus mutans cells colony.

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Chen, Chang Liu, and Yan Peng Zhu. "The Ultrasonic Wave Method to Pile Test and Detection Analysis of a Complex Building." Applied Mechanics and Materials 239-240 (December 2012): 80–83. http://dx.doi.org/10.4028/www.scientific.net/amm.239-240.80.

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The ultrasonic wave method was presented to pile test on the complex building engineering of China Mobile Group Gansu Co.,Ltd. The basic theory, tesing method of pile and judgment standard about the ultrasonic wave method are analyzed.

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Ren, Weicheng, Rugao Gao, Youzhi Zhang, and Maoxin Hou. "Rheological Properties of Ultra-Fine Tailings Cemented Paste Backfill under Ultrasonic Wave Action." Minerals 11, no. 7 (July 3, 2021): 718. http://dx.doi.org/10.3390/min11070718.

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Ultra-fine tailings cemented paste backfill (UCPB) exhibits special rheological characteristics with the effect of an ultrasonic sound field. In this study, in order to explore the thickening effect of slurry under ultrasonic wave action, we examined the rheological properties with ultrasonic wave tests of UCPB and the rheological properties after ultrasonic wave tests of UCPB. We found that the rheological curve of the slurry changed; the Herschel–Bulkley (HB) model in the initial state transformed into the Bingham model under the action of ultrasound. Ultrasonic waves have a positive effect on reducing slurry viscosity and yield stress. The rheological test of the slurry with ultrasonic wave action had a positive effect on significantly reducing the apparent viscosity and initial yield stress of slurry with a 62% mass concentration. The rheological test of slurry with ultrasonic wave action and the rheological test after ultrasonic wave action both have positive effects on reducing the viscosity and yield stress of the slurry with a 64% to 68% mass concentration; the overall effect of reducing the viscosity and yield stress of UCPB is greater after ultrasonic wave action of UCPB.

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Poursan Dalir, Mohammad, Ehsan Hedayati, and Arefeh Hedayati. "Detection and identification of subcutaneous defects using ultrasonic waves in reflective test." Journal of Mechanical Engineering and Sciences 15, no. 2 (June 10, 2021): 8003–15. http://dx.doi.org/10.15282/jmes.15.2.2021.06.0631.

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Non-destructive ultrasonic evaluation is one of the methods used for inspection in mechanical engineering. This method has diverse applications in various fields, including industry and medicine. The main purpose of this research is to identify a subcutaneous defect with ultrasonic waves. This is done by sending ultrasonic waves into the skin tissue and receiving backward echoes, simulating them using a software, and calculating the time difference using the speed of sound. In this research, the behavior of longitudinal and transverse waves is investigated in collisions with a defect by describing the genesis and application history as well as the principles and definitions of ultrasonic waves. In the test, first, the method of identifying the subcutaneous defect is explained. Then, the dimensions and stiffness of the defect are determined by analyzing the information obtained from the location. Using the 3.5-MHz probe, the defect was detected at a distance of 1.8 mm, indicating a high level of reliability compared to the sonography imaging device. This was while the 10-MHz probe failed to detect the defect just near the skin surface. The results confirm the choice of this method as a suitable method for detecting the subcutaneous defect.

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Cao, Liang. "Research on Column Flotation of Sliming Molybdenum Tailings Using Ultrasonic Pre-Treatment." Applied Mechanics and Materials 628 (September 2014): 354–59. http://dx.doi.org/10.4028/www.scientific.net/amm.628.354.

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In this paper, for the re-concentration of sliming molybdenum Tailings in Henan Province, a multi-parameter test is carried out using orthogonal method in the column flotation system with the ultrasonic pre-treatment. Two groups’ optimum parameters of ultrasonic pre-treatment are acquired through the analysis of orthogonal test results. In addition,those two groups parameters are selected to verify the test results. Furthermore, the impact of ultrasonic pre-treatment on the floatability of mineral are defined by comparison tests. All the tests show that ultrasonic pre-treatment promotes the flotation of sliming molybdenum tailings..

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Zhao, Bo, Fan Chen, and Jing Lin Tong. "ZTA Ceramics Tensile Fracture Test Analysis under Ultrasonic Vibration Based on Nonlocal Theory." Materials Science Forum 723 (June 2012): 456–59. http://dx.doi.org/10.4028/www.scientific.net/msf.723.456.

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The nonlocal theory was introduced to establish the nonlocal constitutive model and analyze the effect of ultrasonic on the tensile strength and fracture surface microstructure. ZTA ceramics tensile fracture experimental results show that the tensile stress obviously reduces and the fracture changes under ultrasonic vibration. The experimental results are coincided with theoretical analyses.

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