This article addresses the question: What effects do different types of wedge materials have, if any, on frequency filtering in high-frequency time of flight diffraction scanning?
{"title":"High-Frequency Filtering of Wedge Materials for TOFD","authors":"J. Ellis","doi":"10.32548/2023.me-04313","DOIUrl":"https://doi.org/10.32548/2023.me-04313","url":null,"abstract":"This article addresses the question: What effects do different types of wedge materials have, if any, on frequency filtering in high-frequency time of flight diffraction scanning?","PeriodicalId":49876,"journal":{"name":"Materials Evaluation","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41284235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
As part of the technical program at the 30th ASNT Research Symposium, held in June 2022 in St. Louis, Missouri, a two-part distinct and relevant-to-the-topic event took place. There have been similar events held at various nondestructive evaluation (NDE)-related events in the past, discussing similar issues and challenges.1,2 The first part featured an education session, in which several invited speakers engaged in NDE education at a community college and at several universities (some in association with Los Alamos National Laboratory) presented an overview of their NDE academic programs, challenges they endure in sustaining their programs, and their perspective on what is required to sustain and move their programs forward. The second part included a panel discussion and subsequent breakout sessions. A detailed background on these two program components and the collective discussions that took place during this event are presented in this article.
{"title":"National Alliance for NDE Education and Workforce Development – Current Challenges and Potential Paths Forward","authors":"Katelyn R. Brinker, R. Zoughi","doi":"10.32548/2023.me-04330","DOIUrl":"https://doi.org/10.32548/2023.me-04330","url":null,"abstract":"As part of the technical program at the 30th ASNT Research Symposium, held in June 2022 in St. Louis, Missouri, a two-part distinct and relevant-to-the-topic event took place. There have been similar events held at various nondestructive evaluation (NDE)-related events in the past, discussing similar issues and challenges.1,2 The first part featured an education session, in which several invited speakers engaged in NDE education at a community college and at several universities (some in association with Los Alamos National Laboratory) presented an overview of their NDE academic programs, challenges they endure in sustaining their programs, and their perspective on what is required to sustain and move their programs forward. The second part included a panel discussion and subsequent breakout sessions. A detailed background on these two program components and the collective discussions that took place during this event are presented in this article.","PeriodicalId":49876,"journal":{"name":"Materials Evaluation","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41521963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Paul Adams, A. Gregorian, S. Kenderian, S. Sitzman
Image quality indicators (IQIs) are used to ensure quality in radiography. The requirements for hole-type IQIs have changed from MIL-STD-453-C (US DOD 1984) to ASTM E1742 and E1025 (ASTM 2018a, 2018b). For materials thinner than 0.50 in., the 2-2T hole does not represent 2% sensitivity. E1025 introduced true-T hole IQIs, where the 2-2T hole represents 2% sensitivity. Stainless steel true-T hole IQIs were fabricated using drills and a plasma-focused ion beam instrument. They were imaged using digital radiography (DR), computed radiography, and X-ray film to determine the limit of their visibility. DR was able to detect holes on the order of 2 to 3 pixels in diameter. All three techniques were able to detect the 2T hole in the number 4 IQI while DR was able to detect it in the number 3 IQI. These hole sizes are near the limit where geometric magnification would be required. The better sensitivity of DR is probably a result of being able to minimize fixed structural noise. Presently, for materials thinner than 0.50 in., there is the option to use IQIs defined by either E1742 Annex A1 or E1025. It is recommended that inspection procedures require a particular sensitivity percent that would necessitate the use of a specific IQI.
图像质量指标(iqi)用于保证放射照相的质量。孔型iqi的要求已从MIL-STD-453-C (US DOD 1984)更改为ASTM E1742和E1025 (ASTM 2018a, 2018b)。适用于厚度小于0.50英寸的材料。， 2-2T孔不代表2%的灵敏度。E1025引入了真t孔IQIs，其中2-2T孔代表2%的灵敏度。利用钻头和等离子体聚焦离子束仪器制备了不锈钢真t孔IQIs。使用数字放射照相(DR)、计算机放射照相和x射线胶片对其进行成像，以确定其可见性的极限。DR能够探测到直径为2到3个像素的孔。这三种技术均能检测到4号IQI中的2T孔，而DR能检测到3号IQI中的2T孔。这些孔的尺寸接近几何放大的极限。DR较好的灵敏度可能是由于能够将固定结构噪声降至最低。目前，对于厚度小于0.50英寸的材料。，可以选择使用E1742附录A1或E1025定义的iqi。建议检验程序要求特定的灵敏度百分比，这将需要使用特定的IQI。
{"title":"Detectability of Small True-T Hole Image Quality Indicators by Digital Radiographic Techniques","authors":"Paul Adams, A. Gregorian, S. Kenderian, S. Sitzman","doi":"10.32548/2023.me-04315","DOIUrl":"https://doi.org/10.32548/2023.me-04315","url":null,"abstract":"Image quality indicators (IQIs) are used to ensure quality in radiography. The requirements for hole-type IQIs have changed from MIL-STD-453-C (US DOD 1984) to ASTM E1742 and E1025 (ASTM 2018a, 2018b). For materials thinner than 0.50 in., the 2-2T hole does not represent 2% sensitivity. E1025 introduced true-T hole IQIs, where the 2-2T hole represents 2% sensitivity. Stainless steel true-T hole IQIs were fabricated using drills and a plasma-focused ion beam instrument. They were imaged using digital radiography (DR), computed radiography, and X-ray film to determine the limit of their visibility. DR was able to detect holes on the order of 2 to 3 pixels in diameter. All three techniques were able to detect the 2T hole in the number 4 IQI while DR was able to detect it in the number 3 IQI. These hole sizes are near the limit where geometric magnification would be required. The better sensitivity of DR is probably a result of being able to minimize fixed structural noise. Presently, for materials thinner than 0.50 in., there is the option to use IQIs defined by either E1742 Annex A1 or E1025. It is recommended that inspection procedures require a particular sensitivity percent that would necessitate the use of a specific IQI.","PeriodicalId":49876,"journal":{"name":"Materials Evaluation","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43025730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The goal of this study is to investigate magnetic field characteristics corresponding to variations of the toughness of X70 pipeline steel under cyclic loading. After a series of stress-controlled cyclic loadings, the specimens were subjected to static tensile tests. Changes in the magnetic field were recorded simultaneously during the test. The results suggest that cyclic loadings will reduce the toughness of the material. The initial value and slope of the magnetic field-strain curve obtained in the static tensile test are related to the number of cyclic loadings. The evolutions of magnetic field and the stress-strain curve can reflect variations in the toughness of materials. Compared with the stress-strain curve, the magnetic field demonstrates the fatigue degradation process more markedly. The high sensitivity of the magnetic field to toughness may be used to estimate the degree of fatigue damage of steel.
{"title":"Piezomagnetic Behavior Corresponding to the Variations of the Toughness of X70 Steel Under Cyclic Loadings","authors":"S. Bao, Zhengye Zhao, Yan Li","doi":"10.32548/2023.me-04288","DOIUrl":"https://doi.org/10.32548/2023.me-04288","url":null,"abstract":"The goal of this study is to investigate magnetic field characteristics corresponding to variations of the toughness of X70 pipeline steel under cyclic loading. After a series of stress-controlled cyclic loadings, the specimens were subjected to static tensile tests. Changes in the magnetic field were recorded simultaneously during the test. The results suggest that cyclic loadings will reduce the toughness of the material. The initial value and slope of the magnetic field-strain curve obtained in the static tensile test are related to the number of cyclic loadings. The evolutions of magnetic field and the stress-strain curve can reflect variations in the toughness of materials. Compared with the stress-strain curve, the magnetic field demonstrates the fatigue degradation process more markedly. The high sensitivity of the magnetic field to toughness may be used to estimate the degree of fatigue damage of steel.","PeriodicalId":49876,"journal":{"name":"Materials Evaluation","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46315123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mina Torabi Milani, Jenna Del Fatti, Kimberley Orna, Yixin Zhang, A. Sinclair
A novel approach to designing the encapsulation for a high-temperature ultrasonic transducer to be capable of continuous operation over a temperature range of 25 to 650 °C is proposed. The transducer’s active element is a heavily damped lithium niobate disc of 3 MHz resonance frequency, operating in pulse-echo mode. The initial encapsulation design is developed based on the geometrical, thermal, mechanical, electrical, and ultrasonic requirements. Two finite element modeling systems are developed to analyze the thermal-induced stresses in the transducer at low and high temperatures as well as its ultrasonic performance. The simulation results are used to optimize the design before manufacturing a transducer prototype. The prototype is tested at room and elevated temperatures to verify performance.
{"title":"Design of an Ultrasonic Transducer Encapsulation for High-Temperature Applications","authors":"Mina Torabi Milani, Jenna Del Fatti, Kimberley Orna, Yixin Zhang, A. Sinclair","doi":"10.32548/2023.me-04314","DOIUrl":"https://doi.org/10.32548/2023.me-04314","url":null,"abstract":"A novel approach to designing the encapsulation for a high-temperature ultrasonic transducer to be capable of continuous operation over a temperature range of 25 to 650 °C is proposed. The transducer’s active element is a heavily damped lithium niobate disc of 3 MHz resonance frequency, operating in pulse-echo mode. The initial encapsulation design is developed based on the geometrical, thermal, mechanical, electrical, and ultrasonic requirements. Two finite element modeling systems are developed to analyze the thermal-induced stresses in the transducer at low and high temperatures as well as its ultrasonic performance. The simulation results are used to optimize the design before manufacturing a transducer prototype. The prototype is tested at room and elevated temperatures to verify performance.","PeriodicalId":49876,"journal":{"name":"Materials Evaluation","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44125717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In order to further prove the effectiveness of the sparse least-squares support vector regression (S-LS-SVR) method in damage detection, the authors used the S-LS-SVR model to locate actual damage sources of concrete. The data from acoustic emission testing (AE) are generated and filtered by the pullout test of reinforcement in concrete, and the three-dimensional coordinates of real-time damage sources in the failure process are provided through the model. The S-LS-SVR method is compared with the Newton iterative method and improved exhaustive method for positioning speed, positioning data utilization, and positioning accuracy. The results show that S-LS-SVR is superior to the two other time difference of arrival–based positioning methods in positioning speed, positioning data utilization, and positioning accuracy (data utilization is slightly lower than the improved exhaustive method). The location method based on S-LS-SVR provides the possibility for the application of AE technology in intelligent damage location of bridges, dams, and other service structures.
{"title":"Experimental Study On 3D Acoustic Emission Source Location of Concrete Based On Sparse Least-Squares Support Vector Regression","authors":"","doi":"10.32548/2023.me-04258","DOIUrl":"https://doi.org/10.32548/2023.me-04258","url":null,"abstract":"In order to further prove the effectiveness of the sparse least-squares support vector regression (S-LS-SVR) method in damage detection, the authors used the S-LS-SVR model to locate actual damage sources of concrete. The data from acoustic emission testing (AE) are generated and filtered by the pullout test of reinforcement in concrete, and the three-dimensional coordinates of real-time damage sources in the failure process are provided through the model. The S-LS-SVR method is compared with the Newton iterative method and improved exhaustive method for positioning speed, positioning data utilization, and positioning accuracy. The results show that S-LS-SVR is superior to the two other time difference of arrival–based positioning methods in positioning speed, positioning data utilization, and positioning accuracy (data utilization is slightly lower than the improved exhaustive method). The location method based on S-LS-SVR provides the possibility for the application of AE technology in intelligent damage location of bridges, dams, and other service structures.","PeriodicalId":49876,"journal":{"name":"Materials Evaluation","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43491733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-01DOI: 10.32548/2023.me-03-32.35/
This arrticle tells the story of women’s work in engineering and testing in the 20th century in the UK. During the First World War, large numbers of women were brought into the engineering workforce for munitions work. They were working with newly developed designs, techniques, and materials. For women who were interested in an engineering career, it seemed that this could be the start of a new profession for women, but they were later met with many obstacles.
{"title":"New Materials, New Profession: Women in Engineering, Materials, and Testing in the UK in the Early 20th Century","authors":"","doi":"10.32548/2023.me-03-32.35/","DOIUrl":"https://doi.org/10.32548/2023.me-03-32.35/","url":null,"abstract":"This arrticle tells the story of women’s work in engineering and testing in the 20th century in the UK. During the First World War, large numbers of women were brought into the engineering workforce for munitions work. They were working with newly developed designs, techniques, and materials. For women who were interested in an engineering career, it seemed that this could be the start of a new profession for women, but they were later met with many obstacles.","PeriodicalId":49876,"journal":{"name":"Materials Evaluation","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44791608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-02-01DOI: 10.32548/10.32548/2023.me-04287
M. Gonulal
Ultrasonic testing (UT) is a technical way of communicating with materials, but what does that mean? To be able to understand this, we should think about how people communicate with each other—by talking. Humans have vocal cords in their throats, also known as vocal folds, a band of highly elastic connective tissue. When someone wants to talk, their brain sends a signal to the vocal fold, and after receiving the electrical signal, the folds start to vibrate and cause the air molecules flowing around them vibrate as well. This vibration flows through the air molecules to the ears of the other people, causing tiny bones within the ear to vibrate. This mechanical vibration is converted into an electrical signal by stimulation of the sensory cells in the ear and nerve impulses sent to the brain. Through this complex conversion of electrical signal to vibration, and then vibration back to the electrical signal, two human beings talk to each other. In general, the human ear can detect sounds with frequencies between 20 and 20 000 Hz, which is called an audio range. (Frequency means the number of vibrations against the unit time and is expressed in cycles per seconds). Frequencies below 20 Hz are called infrasound and above 20 000 Hz are called ultrasound. The industrial application of ultrasound is the answer to the question, “How can we talk to material?”, which forms the basis of UT. UT is widely used as a nondestructive testing method to examine materials and welds, as well as bondings between the materials. In this article, UT of dissimilar welds shall be discussed.
{"title":"PAUT of CRA Cladded Pipe Circumferential Dissimilar Welds","authors":"M. Gonulal","doi":"10.32548/10.32548/2023.me-04287","DOIUrl":"https://doi.org/10.32548/10.32548/2023.me-04287","url":null,"abstract":"Ultrasonic testing (UT) is a technical way of communicating with materials, but what does that mean? To be able to understand this, we should think about how people communicate with each other—by talking. Humans have vocal cords in their throats, also known as vocal folds, a band of highly elastic connective tissue. When someone wants to talk, their brain sends a signal to the vocal fold, and after receiving the electrical signal, the folds start to vibrate and cause the air molecules flowing around them vibrate as well. This vibration flows through the air molecules to the ears of the other people, causing tiny bones within the ear to vibrate. This mechanical vibration is converted into an electrical signal by stimulation of the sensory cells in the ear and nerve impulses sent to the brain. Through this complex conversion of electrical signal to vibration, and then vibration back to the electrical signal, two human beings talk to each other. In general, the human ear can detect sounds with frequencies between 20 and 20 000 Hz, which is called an audio range. (Frequency means the number of vibrations against the unit time and is expressed in cycles per seconds). Frequencies below 20 Hz are called infrasound and above 20 000 Hz are called ultrasound. The industrial application of ultrasound is the answer to the question, “How can we talk to material?”, which forms the basis of UT. UT is widely used as a nondestructive testing method to examine materials and welds, as well as bondings between the materials. In this article, UT of dissimilar welds shall be discussed.","PeriodicalId":49876,"journal":{"name":"Materials Evaluation","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46594844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Total focusing method (TFM) is an ultrasonic testing (UT) technique that provides nondestructive testing (NDT) inspectors with new imaging modes, enabling more accurate detection, sizing, and representation of challenging defects. While TFM may offer convenient, nearly true-to-geometry imagery as the inspection result, it is often detrimentally affected by mode conversion artifacts. Current standards, such as ASME Section V, place the burden on the inspector to explain the origins of those artifacts, impacting the productivity and reliability of the inspection. A method enabling direct control of the ultrasonic wave propagation modes—that is, transverse wave (T) or longitudinal wave (L)—through each interface of the acoustic path is proposed and evaluated in this paper. This control is achieved after the full matrix capture acquisition by modulating, according to the desired propagation mode, the gain applied on the individual paths within the summation process. This leads to the formation of a Path-Filtered Total Focusing Method image. Empirical results on various use cases show considerable improvement of the signal-to-noise ratio through the almost complete elimination of signals originating from undesired paths.
{"title":"Acoustic Path Filtering for Improved Multimode Total Focusing Method Inspection","authors":"B. Lepage, Guillaume Painchard-April","doi":"10.32548/2023.me-04279","DOIUrl":"https://doi.org/10.32548/2023.me-04279","url":null,"abstract":"Total focusing method (TFM) is an ultrasonic testing (UT) technique that provides nondestructive testing (NDT) inspectors with new imaging modes, enabling more accurate detection, sizing, and representation of challenging defects. While TFM may offer convenient, nearly true-to-geometry imagery as the inspection result, it is often detrimentally affected by mode conversion artifacts. Current standards, such as ASME Section V, place the burden on the inspector to explain the origins of those artifacts, impacting the productivity and reliability of the inspection. A method enabling direct control of the ultrasonic wave propagation modes—that is, transverse wave (T) or longitudinal wave (L)—through each interface of the acoustic path is proposed and evaluated in this paper. This control is achieved after the full matrix capture acquisition by modulating, according to the desired propagation mode, the gain applied on the individual paths within the summation process. This leads to the formation of a Path-Filtered Total Focusing Method image. Empirical results on various use cases show considerable improvement of the signal-to-noise ratio through the almost complete elimination of signals originating from undesired paths.","PeriodicalId":49876,"journal":{"name":"Materials Evaluation","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47285033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Han Liu, S. Laflamme, Sdiq Anwar Taher, Jong-Hyun Jeong, Jian Li, C. Bennett, William N. Collins, D. Eisenmann, Austin Downey, P. Ziehl, Hongki Jo
Angular motion measurement using commercial sensing technologies can be challenging due to the nonlinearity of the motion and the combination of translational, oscillatory, and rotational behaviors. Recent advances in hyperelastic and self-sensing materials have facilitated the development of flexible electronics, enabling robust and cost-effective angular motion sensing systems. The authors have recently proposed a flexible strain sensor termed corrugated soft elastomeric capacitor (cSEC). The cSEC is a thin-film, ultra-compliant, and scalable sensor that transduces geometric variations into a measurable change in capacitance. It is constituted by layering two conductive plates sandwiching a dielectric that is surfacecorrugated. In this paper, we study the use of the cSEC for angular motion sensing of a free rotational hinge, in which the cSEC was adhered onto the rotating area of the hinge subjected to an axial displacement generating clockwise and counterclockwise angular rotations.
{"title":"Investigation of Soft Elastomeric Capacitor for the Monitoring of Large Angular Motions","authors":"Han Liu, S. Laflamme, Sdiq Anwar Taher, Jong-Hyun Jeong, Jian Li, C. Bennett, William N. Collins, D. Eisenmann, Austin Downey, P. Ziehl, Hongki Jo","doi":"10.32548/2023.me-04294","DOIUrl":"https://doi.org/10.32548/2023.me-04294","url":null,"abstract":"Angular motion measurement using commercial sensing technologies can be challenging due to the nonlinearity of the motion and the combination of translational, oscillatory, and rotational behaviors. Recent advances in hyperelastic and self-sensing materials have facilitated the development of flexible electronics, enabling robust and cost-effective angular motion sensing systems. The authors have recently proposed a flexible strain sensor termed corrugated soft elastomeric capacitor (cSEC). The cSEC is a thin-film, ultra-compliant, and scalable sensor that transduces geometric variations into a measurable change in capacitance. It is constituted by layering two conductive plates sandwiching a dielectric that is surfacecorrugated. In this paper, we study the use of the cSEC for angular motion sensing of a free rotational hinge, in which the cSEC was adhered onto the rotating area of the hinge subjected to an axial displacement generating clockwise and counterclockwise angular rotations.","PeriodicalId":49876,"journal":{"name":"Materials Evaluation","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42680447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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