Absolute Measurement of Material Nonlinear Parameters Using Noncontact Air-Coupled Reception
Nonlinear ultrasound is often employed to assess microdamage or nonlinear elastic properties of a material, and the nonlinear parameter is commonly used to quantify damage sate and material properties. Among the various factors that influence the measurement of nonlinear parameters, maintaining a co...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-01-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/2/244 |
| _version_ | 1797416078989590528 |
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| author | Hyunjo Jeong Sungjong Cho Shuzeng Zhang Xiongbing Li |
| author_facet | Hyunjo Jeong Sungjong Cho Shuzeng Zhang Xiongbing Li |
| author_sort | Hyunjo Jeong |
| collection | DOAJ |
| description | Nonlinear ultrasound is often employed to assess microdamage or nonlinear elastic properties of a material, and the nonlinear parameter is commonly used to quantify damage sate and material properties. Among the various factors that influence the measurement of nonlinear parameters, maintaining a constant contact pressure between the receiver and specimen is important for repeatability of the measurement. The use of an air-coupled transducer may be considered to replace the contact receiver. In this paper, a method of measuring the relative and absolute nonlinear parameters of materials is described using an air-coupled transducer as a receiver. The diffraction and attenuation corrections are newly derived from an acoustic model for a two-layer medium and the nonlinear parameter formula with all corrections is defined. Then, we show that the ratio of the relative nonlinear parameter of the target sample to the reference sample is equal to that of the absolute nonlinear parameter, and this equivalence is confirmed by measurements on three systems of aluminum samples. The proposed method allows the absolute measurement of the nonlinear parameter ratio or the nonlinear parameter without calibration of the air-coupled receiver and removes restrictions on the selection of reference samples. |
| first_indexed | 2024-03-09T05:58:32Z |
| format | Article |
| id | doaj.art-a856ddadbb7d4a0cb78e5f2b0155621f |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T05:58:32Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-a856ddadbb7d4a0cb78e5f2b0155621f2023-12-03T12:11:19ZengMDPI AGMaterials1996-19442021-01-0114224410.3390/ma14020244Absolute Measurement of Material Nonlinear Parameters Using Noncontact Air-Coupled ReceptionHyunjo Jeong0Sungjong Cho1Shuzeng Zhang2Xiongbing Li3Department of Mechanical Engineering, Wonkwang University, Iksan, Jeonbuk 54538, KoreaNondestructive Testing (NDT) Research Center, Seoul National University of Science and Technology, Seoul 01811, KoreaSchool of Traffic and Transportation Engineering, Central South University, Changsha 410075, ChinaSchool of Traffic and Transportation Engineering, Central South University, Changsha 410075, ChinaNonlinear ultrasound is often employed to assess microdamage or nonlinear elastic properties of a material, and the nonlinear parameter is commonly used to quantify damage sate and material properties. Among the various factors that influence the measurement of nonlinear parameters, maintaining a constant contact pressure between the receiver and specimen is important for repeatability of the measurement. The use of an air-coupled transducer may be considered to replace the contact receiver. In this paper, a method of measuring the relative and absolute nonlinear parameters of materials is described using an air-coupled transducer as a receiver. The diffraction and attenuation corrections are newly derived from an acoustic model for a two-layer medium and the nonlinear parameter formula with all corrections is defined. Then, we show that the ratio of the relative nonlinear parameter of the target sample to the reference sample is equal to that of the absolute nonlinear parameter, and this equivalence is confirmed by measurements on three systems of aluminum samples. The proposed method allows the absolute measurement of the nonlinear parameter ratio or the nonlinear parameter without calibration of the air-coupled receiver and removes restrictions on the selection of reference samples.https://www.mdpi.com/1996-1944/14/2/244nonlinear parameternoncontact receptionair-coupled receiveraluminum samplescorrections |
| spellingShingle | Hyunjo Jeong Sungjong Cho Shuzeng Zhang Xiongbing Li Absolute Measurement of Material Nonlinear Parameters Using Noncontact Air-Coupled Reception Materials nonlinear parameter noncontact reception air-coupled receiver aluminum samples corrections |
| title | Absolute Measurement of Material Nonlinear Parameters Using Noncontact Air-Coupled Reception |
| title_full | Absolute Measurement of Material Nonlinear Parameters Using Noncontact Air-Coupled Reception |
| title_fullStr | Absolute Measurement of Material Nonlinear Parameters Using Noncontact Air-Coupled Reception |
| title_full_unstemmed | Absolute Measurement of Material Nonlinear Parameters Using Noncontact Air-Coupled Reception |
| title_short | Absolute Measurement of Material Nonlinear Parameters Using Noncontact Air-Coupled Reception |
| title_sort | absolute measurement of material nonlinear parameters using noncontact air coupled reception |
| topic | nonlinear parameter noncontact reception air-coupled receiver aluminum samples corrections |
| url | https://www.mdpi.com/1996-1944/14/2/244 |
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