Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019239
Kai Zhang, D. Huang, Bing-rong Chen, Yi-zheng Tang
The piezoelectric single crystal has significant advantages including both high electromechanical coupling and piezoelectric coefficients. By use of four 33-mode single crystal pieces, a thin light beryllium alloy head mass and a thick heavy tungsten alloy tail mass can expand the bandwidth of the middle-frequency transducer. The one-fourth finite element model of transducer was set up with ANSYS software and the structure of the transducer was optimized. A final 9-element array was designed, fabricated and measured. The bandwidth of the array is 12kHz-40kHz, in which the ripple of the transmitting voltage response does not exceed +/-3.3dB. There are several conclusions from the research: the bandwidth of tonpilz transducers can be expanded by the use of single crystal pieces, beryllium alloy head mass and tungsten alloy tail mass; and it gives a method to achieve the broad-band projecting performance of middle-frequency transducers.
{"title":"Wideband Single Crystal Longitudinal Transducer for Underwater Sound","authors":"Kai Zhang, D. Huang, Bing-rong Chen, Yi-zheng Tang","doi":"10.1109/SPAWDA48812.2019.9019239","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019239","url":null,"abstract":"The piezoelectric single crystal has significant advantages including both high electromechanical coupling and piezoelectric coefficients. By use of four 33-mode single crystal pieces, a thin light beryllium alloy head mass and a thick heavy tungsten alloy tail mass can expand the bandwidth of the middle-frequency transducer. The one-fourth finite element model of transducer was set up with ANSYS software and the structure of the transducer was optimized. A final 9-element array was designed, fabricated and measured. The bandwidth of the array is 12kHz-40kHz, in which the ripple of the transmitting voltage response does not exceed +/-3.3dB. There are several conclusions from the research: the bandwidth of tonpilz transducers can be expanded by the use of single crystal pieces, beryllium alloy head mass and tungsten alloy tail mass; and it gives a method to achieve the broad-band projecting performance of middle-frequency transducers.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115309962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019267
Chao Shi, C. Pan, Haojie Xia, Wei-shi Li, Liandong Yu
Resonant-type piezoelectric impact motors (PIMs) can extremely improve the moving speed and loading capacity of traditional PIMs. However, it is difficult to match the inherent vibration modes of the stator with specific ratios of resonant frequencies and vibration amplitudes. In this paper, a novel high-power piezoelectric resonator with matched vibration modes is designed using two piezoelectric stacks and integrated asymmetric flexible mechanism. Structural design and working principle of the piezoelectric resonator are introduced. Finite element analysis is used to search the matching condition of the vibration modes. A prototype piezoelectric resonator is tested to validate its high-power ability in the matched vibration modes.
{"title":"Design of a High-Power Piezoelectric Resonator with Matched Vibration Modes","authors":"Chao Shi, C. Pan, Haojie Xia, Wei-shi Li, Liandong Yu","doi":"10.1109/SPAWDA48812.2019.9019267","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019267","url":null,"abstract":"Resonant-type piezoelectric impact motors (PIMs) can extremely improve the moving speed and loading capacity of traditional PIMs. However, it is difficult to match the inherent vibration modes of the stator with specific ratios of resonant frequencies and vibration amplitudes. In this paper, a novel high-power piezoelectric resonator with matched vibration modes is designed using two piezoelectric stacks and integrated asymmetric flexible mechanism. Structural design and working principle of the piezoelectric resonator are introduced. Finite element analysis is used to search the matching condition of the vibration modes. A prototype piezoelectric resonator is tested to validate its high-power ability in the matched vibration modes.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121246756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019287
Hao-yu Huang, F. Zhu, Jiaqi Zhu, Bin Wang, Z. Qian
A general approach, which can derive dispersion relations efficiently and automatically for infinite layered structures with any number of piezoelectric and elastic layers, is proposed in this paper. Based on Stroh formalism and dual variable and position method, the general relationship between top and bottom variables of single layer is obtained firstly. Considering those different layups possibly appearing in multilayered structures, three base cases are presented in detail. By combing these base cases repeatedly from the bottom of the plates to the top, we can easily write programming codes to derive dispersion relations for any general multilayered structures automatically. The results show great conformity with the reported work and simultaneously prove the ability of our approach for complex and generally anisotropic multilayered structure. Above all, this general approach is efficient and superior to get the dispersion relations, which is convenient for further study of wave propagation characteristics in general multilayered structures.
{"title":"A General Method for Solving Dispersion Relations in Layered Structures with Piezoelctric and Elastic Layers","authors":"Hao-yu Huang, F. Zhu, Jiaqi Zhu, Bin Wang, Z. Qian","doi":"10.1109/SPAWDA48812.2019.9019287","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019287","url":null,"abstract":"A general approach, which can derive dispersion relations efficiently and automatically for infinite layered structures with any number of piezoelectric and elastic layers, is proposed in this paper. Based on Stroh formalism and dual variable and position method, the general relationship between top and bottom variables of single layer is obtained firstly. Considering those different layups possibly appearing in multilayered structures, three base cases are presented in detail. By combing these base cases repeatedly from the bottom of the plates to the top, we can easily write programming codes to derive dispersion relations for any general multilayered structures automatically. The results show great conformity with the reported work and simultaneously prove the ability of our approach for complex and generally anisotropic multilayered structure. Above all, this general approach is efficient and superior to get the dispersion relations, which is convenient for further study of wave propagation characteristics in general multilayered structures.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126154065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019273
Peng Chen, Ying Yang, Tingrui He, Yiping Wang
Sm-doped 0.71Pb(Mg1/3Nb2/3)O3–0.29PbTiO3 ceramics (denoted as xSm-71PMN–29PT, 0 ≤ x ≤ 5 mol. %) were synthesized by sol-gel method. The effects of Sm-doping on the electrical and electrocaloric properties of the 71PMN-29PT were investigated. Among all samples prepared, 3Sm-71PMN–29PT displays the optimal piezoelectric and dielectric properties – piezoelectric coefficient d33 of 1040 pC/N, relative dielectric constant εr of 8078, electromechanical coupling factor kp of 0.60. With the increase of Sm doping amount, the dielectric-peak temperature Tm decreases from 405 K to 318 K. Moreover, the electrocaloric (EC) effect in the related ceramics was calculated via indirect method. Under the electric field of 40 kV/cm, the EC temperature change (ΔT) reach their maximal values when the testing temperature is near Tm. The largest electrocaloric response is found in 71PMN–29PT ceramic at T = 428 K with ΔT = 1.49 K, and the largest room temperature electrocaloric response is found in 5Sm-71PMN–29PT ceramic with ΔT = 0.77 K. The excellent comprehensive electrical properties and room temperature electrocaloric performances make Sm-doped 71PMN–29PT ceramics to be one of the most promising candidates for solid- refrigerator applications.
{"title":"Investigation of Electric and Electrocaloric Properties for Sm-Doped 71PMN–29PT Ceramics","authors":"Peng Chen, Ying Yang, Tingrui He, Yiping Wang","doi":"10.1109/SPAWDA48812.2019.9019273","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019273","url":null,"abstract":"Sm-doped 0.71Pb(Mg1/3Nb2/3)O3–0.29PbTiO3 ceramics (denoted as xSm-71PMN–29PT, 0 ≤ x ≤ 5 mol. %) were synthesized by sol-gel method. The effects of Sm-doping on the electrical and electrocaloric properties of the 71PMN-29PT were investigated. Among all samples prepared, 3Sm-71PMN–29PT displays the optimal piezoelectric and dielectric properties – piezoelectric coefficient d33 of 1040 pC/N, relative dielectric constant εr of 8078, electromechanical coupling factor kp of 0.60. With the increase of Sm doping amount, the dielectric-peak temperature Tm decreases from 405 K to 318 K. Moreover, the electrocaloric (EC) effect in the related ceramics was calculated via indirect method. Under the electric field of 40 kV/cm, the EC temperature change (ΔT) reach their maximal values when the testing temperature is near Tm. The largest electrocaloric response is found in 71PMN–29PT ceramic at T = 428 K with ΔT = 1.49 K, and the largest room temperature electrocaloric response is found in 5Sm-71PMN–29PT ceramic with ΔT = 0.77 K. The excellent comprehensive electrical properties and room temperature electrocaloric performances make Sm-doped 71PMN–29PT ceramics to be one of the most promising candidates for solid- refrigerator applications.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123757301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019227
Zhen-yu Zhang, Chao Zhang, H. Ji, J. Qiu, Jinling Zhao
This paper presents a numerical study of mode conversion behavior of guided wave in glass fiber reinforced polymer with matrix cracks. For a single crack, two different factors including the guided wave mode of the excitation and the position of the crack are taken into consideration. Results show that mode conversion from symmetric mode to antisymmetric mode plays an important role when the crack locates near the surface. Aimed at evaluating micro-damage accumulation, the mode conversion behavior is quantified by defining a parameter MCI (Mode Conversion Index). The relation between MCI and the density of matrix cracks shows that the mode conversion behavior is very sensitive to the micro-damage accumulation, which has potential for composite fatigue evaluation.
{"title":"Mode Conversion in Composite Material with Matrix Cracks","authors":"Zhen-yu Zhang, Chao Zhang, H. Ji, J. Qiu, Jinling Zhao","doi":"10.1109/SPAWDA48812.2019.9019227","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019227","url":null,"abstract":"This paper presents a numerical study of mode conversion behavior of guided wave in glass fiber reinforced polymer with matrix cracks. For a single crack, two different factors including the guided wave mode of the excitation and the position of the crack are taken into consideration. Results show that mode conversion from symmetric mode to antisymmetric mode plays an important role when the crack locates near the surface. Aimed at evaluating micro-damage accumulation, the mode conversion behavior is quantified by defining a parameter MCI (Mode Conversion Index). The relation between MCI and the density of matrix cracks shows that the mode conversion behavior is very sensitive to the micro-damage accumulation, which has potential for composite fatigue evaluation.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122914123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019274
Xiang-lin Gong, Jinghui Wu, Jianke Du, Jian-kang Chen, Ji Wang
Many engineering materials experience the corrosion process in harsh environments.In order to detect changes in surfaces of materials, it is possible to predict the relationship between surface conditions and surface acoustic waves in a large structural element.It is found that the Rayleigh-Ritz method can be used for the analysis of surface acoustic waves propagating in an elastic solid with a rough surface. The calculation with Rayleigh-Ritz shown that accurate results of Rayleigh wave frequency can be obtained by using the Rayleigh-Ritz method for arbitrary surfaces. By obtaining the Rayleigh wave velocity under the traction-free condition of the curved surface, the relationship between properties of surface waves and surface roughness is obtained for the evaluation of surface property.
{"title":"An Analysis of Surface Acoustic Wave in Elastic Solids with Curved Boundary","authors":"Xiang-lin Gong, Jinghui Wu, Jianke Du, Jian-kang Chen, Ji Wang","doi":"10.1109/SPAWDA48812.2019.9019274","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019274","url":null,"abstract":"Many engineering materials experience the corrosion process in harsh environments.In order to detect changes in surfaces of materials, it is possible to predict the relationship between surface conditions and surface acoustic waves in a large structural element.It is found that the Rayleigh-Ritz method can be used for the analysis of surface acoustic waves propagating in an elastic solid with a rough surface. The calculation with Rayleigh-Ritz shown that accurate results of Rayleigh wave frequency can be obtained by using the Rayleigh-Ritz method for arbitrary surfaces. By obtaining the Rayleigh wave velocity under the traction-free condition of the curved surface, the relationship between properties of surface waves and surface roughness is obtained for the evaluation of surface property.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117128404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019327
Yishan Zeng, Y. Hao, Jian Chen, Wenzhi Gao, Liangguo He
This paper utilizes displacement amplifying mechanism and resonance drive to improve the output performance of piezoelectric pump. A rhombic piezoelectric actuator is designed and simulated with a piezoelectric stack (10 mm×10 mm×18.2 mm) and a rhombic displacement amplifying mechanism. Modal analyses of the rhombic piezoelectric actuator are carried out under fixed-vibrating constraint and symmetric constraint. The simulation results show that the resonant frequencies of the actuator in bending vibrating mode under fixed-vibrating and symmetric constraints are 724.6 Hz and 3205.9 Hz respectively. Then piezoelectric pumps are designed with two types of rhombic piezoelectric actuators vibrating two diaphragm pumps simultaneously in a symmetric structure. High flowrates output of the presented piezoelectric pumps design can be expected.
{"title":"Design and Simulation of High Flowrate Piezoelectric Pump based on Rhombic Piezoelectric Actuator","authors":"Yishan Zeng, Y. Hao, Jian Chen, Wenzhi Gao, Liangguo He","doi":"10.1109/SPAWDA48812.2019.9019327","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019327","url":null,"abstract":"This paper utilizes displacement amplifying mechanism and resonance drive to improve the output performance of piezoelectric pump. A rhombic piezoelectric actuator is designed and simulated with a piezoelectric stack (10 mm×10 mm×18.2 mm) and a rhombic displacement amplifying mechanism. Modal analyses of the rhombic piezoelectric actuator are carried out under fixed-vibrating constraint and symmetric constraint. The simulation results show that the resonant frequencies of the actuator in bending vibrating mode under fixed-vibrating and symmetric constraints are 724.6 Hz and 3205.9 Hz respectively. Then piezoelectric pumps are designed with two types of rhombic piezoelectric actuators vibrating two diaphragm pumps simultaneously in a symmetric structure. High flowrates output of the presented piezoelectric pumps design can be expected.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121402377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019277
Jin-ming Zhang, Yang Li, Yunzhi Huang, Yang Gao
A one-dimensional (1D) quasicrystal (QC) [1] refers to a three-dimensional structure with atomic arrangement quasi-periodically in one direction and periodically in the plane perpendicular to that direction [2] , [3] . Functionally graded martial (FGM) [4] – [10] composite piezoelectric QCs and other materials expand the application of QCs [11] – [13] .
{"title":"Free Vibration of Functionally Graded One-Dimensional Hexagonal Piezoelectric Quasicrystal Sandwich Plates","authors":"Jin-ming Zhang, Yang Li, Yunzhi Huang, Yang Gao","doi":"10.1109/SPAWDA48812.2019.9019277","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019277","url":null,"abstract":"A one-dimensional (1D) quasicrystal (QC) [1] refers to a three-dimensional structure with atomic arrangement quasi-periodically in one direction and periodically in the plane perpendicular to that direction [2] , [3] . Functionally graded martial (FGM) [4] – [10] composite piezoelectric QCs and other materials expand the application of QCs [11] – [13] .","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114334444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019254
Mingzhu Chen, Qiaozhen Zhang, Xiangyong Zhao, Feifei Wang
In this work, a PMUT based on Pt/AlN/Pt/TiO2/SiO2/Si structure with square suspended membrane is proposed and modeled by performing finite element method (FEM) software COMSOL. The vibration mode, resonant frequency and effective electro-mechanical coupling coefficient (keff2) of the proposed AlN-based PMUT are analyzed. It is shown that the (0,1) resonant mode of PMUT reaches up to 25.73 MHz when the AlN thickness is 1μm. Moreover, the influences on the sensitivity of geometric parameters, i.e., the side length and thickness of top electrode, and the thickness of AlN thin film, are investigated. Maximum transmitting and receiving sensitivity of 32.79 pm/V and 0.478mV/kPa, respectively, are obtainable with optimum geometric parameters. Investigation results demonstrate that by optimizing the structure of the proposed AlN-based PMUT, keff2 and sensitivity are significantly improved, which is beneficial for meets the requirement for application of high resolution ultrasound imaging.
{"title":"Modeling and Simulation of Aluminium Nitride-Based Piezoelectric Micromachined Ultrasonic Transducer for Ultrasound Imaging","authors":"Mingzhu Chen, Qiaozhen Zhang, Xiangyong Zhao, Feifei Wang","doi":"10.1109/SPAWDA48812.2019.9019254","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019254","url":null,"abstract":"In this work, a PMUT based on Pt/AlN/Pt/TiO2/SiO2/Si structure with square suspended membrane is proposed and modeled by performing finite element method (FEM) software COMSOL. The vibration mode, resonant frequency and effective electro-mechanical coupling coefficient (keff2) of the proposed AlN-based PMUT are analyzed. It is shown that the (0,1) resonant mode of PMUT reaches up to 25.73 MHz when the AlN thickness is 1μm. Moreover, the influences on the sensitivity of geometric parameters, i.e., the side length and thickness of top electrode, and the thickness of AlN thin film, are investigated. Maximum transmitting and receiving sensitivity of 32.79 pm/V and 0.478mV/kPa, respectively, are obtainable with optimum geometric parameters. Investigation results demonstrate that by optimizing the structure of the proposed AlN-based PMUT, keff2 and sensitivity are significantly improved, which is beneficial for meets the requirement for application of high resolution ultrasound imaging.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114513805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019307
Jie Wang, Sibo Zhou, C. Gao
This work focus on investigating the thermal fracture behavior of a sub-interface crack on the base of the former work[1], in which the bonded materials are assumed to have the same mechanical properties but dissimilar thermal parameters. However, the constituent materials of composites generally are different in both thermal and mechanical performance, the role of mechanical properties of the bonded materials play in the crack thermal fracture may not be simply ignored. Hence this work consider a more general case that the two bonded semi-infinite plates are of both thermally and mechanically difference, in one of which there exists a crack paralleling to the thermally imperfect bonding interface, a remote heat flux is applied. By using an integral transform/integral equation method, the influence of interfacial thermal resistance on the temperature difference along the crack line, the thermal stress intensity factors (TSIFs) and the crack opening/sliding displacements are researched. The results for steel/chrome bi-material combination show that the thermal fracture behavior of the sub-interface crack is significantly influenced by the interfacial thermal resistance and the crack-interface distance..
{"title":"The Effect of Interfacial Thermal Resistance on A Sub-Interface Crack Under Thermal Loading","authors":"Jie Wang, Sibo Zhou, C. Gao","doi":"10.1109/SPAWDA48812.2019.9019307","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019307","url":null,"abstract":"This work focus on investigating the thermal fracture behavior of a sub-interface crack on the base of the former work[1], in which the bonded materials are assumed to have the same mechanical properties but dissimilar thermal parameters. However, the constituent materials of composites generally are different in both thermal and mechanical performance, the role of mechanical properties of the bonded materials play in the crack thermal fracture may not be simply ignored. Hence this work consider a more general case that the two bonded semi-infinite plates are of both thermally and mechanically difference, in one of which there exists a crack paralleling to the thermally imperfect bonding interface, a remote heat flux is applied. By using an integral transform/integral equation method, the influence of interfacial thermal resistance on the temperature difference along the crack line, the thermal stress intensity factors (TSIFs) and the crack opening/sliding displacements are researched. The results for steel/chrome bi-material combination show that the thermal fracture behavior of the sub-interface crack is significantly influenced by the interfacial thermal resistance and the crack-interface distance..","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126564779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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