One of the limiting factors for expanding the applications of aluminum alloy castings in many high-tech industries is the insufficient level of tribological properties, especially under conditions of dry and abrasive wear. Reinforcing of aluminum alloys with hard ceramic particles, i.e., transition to aluminum matrix composites, allows significantly increasing their resistance against dry sliding friction, scuffing, and seizure in wide temperature and force intervals of operation. Among the numerous problems related to the industrial implementation of cast aluminum matrix composites, the problem of their recycling takes the important place. This work is aimed at establishing the influence of metallurgical processes during remelting on the change in tribological properties of cast Al-Si-B4C aluminum matrix composites. For this purpose, tribological tests in conditions of dry friction according to the ball-on-disc scheme were used. Reinforcing of an AlSi12 matrix alloy with B4C particles leads to a decrease in the composite friction coefficient and the mass wear in the as-cast state in comparison with an unreinforced matrix alloy. During remelting, the tribological properties of the aluminum matrix composites do not deteriorate. Repeated remelting leads to the improvement in particle distribution uniformity, formation of the Al3BC phase at the matrix/particle interfaces, fragmentation of reinforcing B4C particles due to cyclic thermal loads as well as an increase in the porosity fraction. The changes in the structural-phase composition during remelting have a direct influence on the level of tribological properties. Typical effects associated with dry friction, such as plastic deformation of the matrix material and the formation of areas of adhesion-cohesive fracture, indicative of scuffing, were revealed by SEM analysis of the wear tracks of an unreinforced matrix alloy. For the composite material, these effects manifested to a much lesser extent. A qualitatively similar sliding wear behavior was observed for all composite samples, regardless of the remelting iteration. The study suggests that the formation of a transitional tribolayer may occur during dry sliding friction of aluminum matrix composites, which can reduce the friction coefficient.
{"title":"Tribological Behavior of Cast Aluminum Matrix Composites After Multiple Remelting","authors":"Evgeny Prusov, Artemiy Aborkin, Vladislav Deev, Dmitriy Bokaryov, Dmitriy Babin","doi":"10.61552/jme.2023.03.006","DOIUrl":"https://doi.org/10.61552/jme.2023.03.006","url":null,"abstract":"One of the limiting factors for expanding the applications of aluminum alloy castings in many high-tech industries is the insufficient level of tribological properties, especially under conditions of dry and abrasive wear. Reinforcing of aluminum alloys with hard ceramic particles, i.e., transition to aluminum matrix composites, allows significantly increasing their resistance against dry sliding friction, scuffing, and seizure in wide temperature and force intervals of operation. Among the numerous problems related to the industrial implementation of cast aluminum matrix composites, the problem of their recycling takes the important place. This work is aimed at establishing the influence of metallurgical processes during remelting on the change in tribological properties of cast Al-Si-B4C aluminum matrix composites. For this purpose, tribological tests in conditions of dry friction according to the ball-on-disc scheme were used. Reinforcing of an AlSi12 matrix alloy with B4C particles leads to a decrease in the composite friction coefficient and the mass wear in the as-cast state in comparison with an unreinforced matrix alloy. During remelting, the tribological properties of the aluminum matrix composites do not deteriorate. Repeated remelting leads to the improvement in particle distribution uniformity, formation of the Al3BC phase at the matrix/particle interfaces, fragmentation of reinforcing B4C particles due to cyclic thermal loads as well as an increase in the porosity fraction. The changes in the structural-phase composition during remelting have a direct influence on the level of tribological properties. Typical effects associated with dry friction, such as plastic deformation of the matrix material and the formation of areas of adhesion-cohesive fracture, indicative of scuffing, were revealed by SEM analysis of the wear tracks of an unreinforced matrix alloy. For the composite material, these effects manifested to a much lesser extent. A qualitatively similar sliding wear behavior was observed for all composite samples, regardless of the remelting iteration. The study suggests that the formation of a transitional tribolayer may occur during dry sliding friction of aluminum matrix composites, which can reduce the friction coefficient.","PeriodicalId":42984,"journal":{"name":"Journal of Materials and Engineering Structures","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136094809","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 : 2023-10-01DOI: 10.61552/jme.2023.03.002
Galina Eremina, Alexey Smolin
Degenerative changes in the lumbar spine significantly reduce the quality of life of people. To fully understand the biomechanics of the affected spine, it is crucial to consider the biomechanical alterations caused by degeneration of the intervertebral disc (IVD). Therefore this study is aimed at the development of a discrete element model of the mechanical behavior of the L4-L5 spinal motion segment, which covers all the degeneration grades from healthy IVD to its severe degeneration, and numerical study of the influence of the IVD degeneration on stress state and biomechanics of the spine. To analyze the effects of IVD degeneration on spine biomechanics we simulated physiological loading conditions using compressive forces. The results of modeling showed that at the initial stages of degenerative changes, an increase in the amplitude and area of maximum compressive stresses in the disc is observed. At the late stages of disc degradation, a decrease in the value of intradiscal pressure and a shift in the maximum compressive stresses in the dorsal direction are observed. Such an influence of the degradation of the geometric and mechanical parameters of the tissues of the disc leads to the effect of bulging, which in turn will lead to the formation of an intervertebral hernia.
{"title":"Simulation of the Mechanical Behavior of the Degradation L4-L5 Lumbar Spine","authors":"Galina Eremina, Alexey Smolin","doi":"10.61552/jme.2023.03.002","DOIUrl":"https://doi.org/10.61552/jme.2023.03.002","url":null,"abstract":"Degenerative changes in the lumbar spine significantly reduce the quality of life of people. To fully understand the biomechanics of the affected spine, it is crucial to consider the biomechanical alterations caused by degeneration of the intervertebral disc (IVD). Therefore this study is aimed at the development of a discrete element model of the mechanical behavior of the L4-L5 spinal motion segment, which covers all the degeneration grades from healthy IVD to its severe degeneration, and numerical study of the influence of the IVD degeneration on stress state and biomechanics of the spine. To analyze the effects of IVD degeneration on spine biomechanics we simulated physiological loading conditions using compressive forces. The results of modeling showed that at the initial stages of degenerative changes, an increase in the amplitude and area of maximum compressive stresses in the disc is observed. At the late stages of disc degradation, a decrease in the value of intradiscal pressure and a shift in the maximum compressive stresses in the dorsal direction are observed. Such an influence of the degradation of the geometric and mechanical parameters of the tissues of the disc leads to the effect of bulging, which in turn will lead to the formation of an intervertebral hernia.","PeriodicalId":42984,"journal":{"name":"Journal of Materials and Engineering Structures","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136094953","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}
Vibration is produced by imbalance, positioning, mechanical softness, shaft cracking, and various defects in spinning machinery. In recent years, rotor defect diagnostics have become more important. This study looks at the effects of various input parameters, such as shaft operating speed, crack depths, and l/d ratio (ratio of the distance of crack from one end to the diameter of the shaft). A steel shaft with a disc positioned in the center and supported by two bearings was utilized to investigate the vibration characteristics of a shaft. An artificial fracture was introduced in order to notice the rotor's vibration characteristics when a defect is present. On a rotor with a diameter of 25mm, the signature knowledge was first obtained with fracture depths ranging from 1mm to 3mm. The amplitude and frequency of vibration in the rotor bearing system were used to analyse the results of the three input parameters. FFT analyzer was used to measure the amplitude and frequency (Fast Fourier remodel analyzer). The signals are processed using a high-speed fast Fourier remodel analyzer. To evaluate important input parameters affecting system vibrations, Taguchi and Analysis of Variance (ANOVA) methods were applied. The ANOVA was distributed with a 95% confidence level. The technique parameters with a p-value of less than 0.05 were mentioned as being critical to the response. Taguchi Analysis was used to determine the effect of the input parameters on the amplitude and frequency of vibration in the axial and vertical directions.
{"title":"Effect of Shaft Speed, Crack Depth and L/D Ratio in Rotor Bearing System: Using Taguchi Method and ANOVA","authors":"Sudheer Kumar Veernapu, Nagaraju Cherukuri, Vangipurapu Bapi Raju","doi":"10.61552/jme.2023.03.005","DOIUrl":"https://doi.org/10.61552/jme.2023.03.005","url":null,"abstract":"Vibration is produced by imbalance, positioning, mechanical softness, shaft cracking, and various defects in spinning machinery. In recent years, rotor defect diagnostics have become more important. This study looks at the effects of various input parameters, such as shaft operating speed, crack depths, and l/d ratio (ratio of the distance of crack from one end to the diameter of the shaft). A steel shaft with a disc positioned in the center and supported by two bearings was utilized to investigate the vibration characteristics of a shaft. An artificial fracture was introduced in order to notice the rotor's vibration characteristics when a defect is present. On a rotor with a diameter of 25mm, the signature knowledge was first obtained with fracture depths ranging from 1mm to 3mm. The amplitude and frequency of vibration in the rotor bearing system were used to analyse the results of the three input parameters. FFT analyzer was used to measure the amplitude and frequency (Fast Fourier remodel analyzer). The signals are processed using a high-speed fast Fourier remodel analyzer. To evaluate important input parameters affecting system vibrations, Taguchi and Analysis of Variance (ANOVA) methods were applied. The ANOVA was distributed with a 95% confidence level. The technique parameters with a p-value of less than 0.05 were mentioned as being critical to the response. Taguchi Analysis was used to determine the effect of the input parameters on the amplitude and frequency of vibration in the axial and vertical directions.","PeriodicalId":42984,"journal":{"name":"Journal of Materials and Engineering Structures","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136093899","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 : 2023-10-01DOI: 10.61552/jme.2023.03.004
Strahinja Djurović, Dragan Lazarević, Milan Ivković, Milan Mišić, Bojan Stojčetović, Živče Šarkoćević
Additive manufacturing or 3D printing is one of the newer methods of manufacturing. The basic difference to other types of production is that the material is added in the form of layers. There are many types of technologies in 3D printing, but the most common is fused deposition modeling. This technology uses different types of thermoplastic materials to build an object. This paper will present the tribological characteristics and surface roughness measurement of samples printed on a low-cost 3D printer using thermoplastic materials ABS.
{"title":"Tribological Behaviour and Surface Roughness Quality of 3D Printed ABS Material","authors":"Strahinja Djurović, Dragan Lazarević, Milan Ivković, Milan Mišić, Bojan Stojčetović, Živče Šarkoćević","doi":"10.61552/jme.2023.03.004","DOIUrl":"https://doi.org/10.61552/jme.2023.03.004","url":null,"abstract":"Additive manufacturing or 3D printing is one of the newer methods of manufacturing. The basic difference to other types of production is that the material is added in the form of layers. There are many types of technologies in 3D printing, but the most common is fused deposition modeling. This technology uses different types of thermoplastic materials to build an object. This paper will present the tribological characteristics and surface roughness measurement of samples printed on a low-cost 3D printer using thermoplastic materials ABS.","PeriodicalId":42984,"journal":{"name":"Journal of Materials and Engineering Structures","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136094805","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 : 2023-10-01DOI: 10.61552/jme.2023.03.001
Vipin Kumar, Ravi Prakash Tewari, Ramesh Pandey, Anubhav Rawat Rawat
Pin-on-disk (PoD) tests, the most prevalent studies, are being carried out in order to evaluate tribological behaviour of different bearing materials. However, the comparison of results obtained from the PoD tests is very difficult. In this present study, several machine learning models were developed and trained and then these trained machine learning models were validated by quantifying forecasting error against the experimental data reported in literature. These machine learning based models can be utilized as alternative solution of PoD trials in order to minimize time consumption and experiment complexity.
{"title":"Triboinformatic Modeling of Wear in Total Knee Replacement Implants Using Machine Learning Algorithms","authors":"Vipin Kumar, Ravi Prakash Tewari, Ramesh Pandey, Anubhav Rawat Rawat","doi":"10.61552/jme.2023.03.001","DOIUrl":"https://doi.org/10.61552/jme.2023.03.001","url":null,"abstract":"Pin-on-disk (PoD) tests, the most prevalent studies, are being carried out in order to evaluate tribological behaviour of different bearing materials. However, the comparison of results obtained from the PoD tests is very difficult. In this present study, several machine learning models were developed and trained and then these trained machine learning models were validated by quantifying forecasting error against the experimental data reported in literature. These machine learning based models can be utilized as alternative solution of PoD trials in order to minimize time consumption and experiment complexity.","PeriodicalId":42984,"journal":{"name":"Journal of Materials and Engineering Structures","volume":"208 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136094225","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 : 2023-10-01DOI: 10.61552/jme.2023.03.003
Anastasiya Yakovenko, Irina Goryacheva
The analytical solution of the elastic contact problem for the bodies with rough surfaces is presented using a deterministic description of the surface roughness. Particularly, a model of the normal contact of a periodic system of axisymmetric punches of different heights with an elastic half-space is developed. The solution is obtained taking into account the real contact pressure distribution only under nearby ones, and considering the action of remote ones as the nominal pressure (the localization method). The effect of the shape of the punches and their spatial positions on the dependencies of the real contact area and the contact pressure distribution at the contact spots on the applied load are studied. The additional displacement function, which characterizes the effect of surface roughness on the relative approach of contacting bodies at the macrolevel, is also analysed.
{"title":"Deterministic Model of Elastic Rough Contact Taking into Account the Mutual Influence of Asperities","authors":"Anastasiya Yakovenko, Irina Goryacheva","doi":"10.61552/jme.2023.03.003","DOIUrl":"https://doi.org/10.61552/jme.2023.03.003","url":null,"abstract":"The analytical solution of the elastic contact problem for the bodies with rough surfaces is presented using a deterministic description of the surface roughness. Particularly, a model of the normal contact of a periodic system of axisymmetric punches of different heights with an elastic half-space is developed. The solution is obtained taking into account the real contact pressure distribution only under nearby ones, and considering the action of remote ones as the nominal pressure (the localization method). The effect of the shape of the punches and their spatial positions on the dependencies of the real contact area and the contact pressure distribution at the contact spots on the applied load are studied. The additional displacement function, which characterizes the effect of surface roughness on the relative approach of contacting bodies at the macrolevel, is also analysed.","PeriodicalId":42984,"journal":{"name":"Journal of Materials and Engineering Structures","volume":"2020 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136094211","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 : 2023-06-28DOI: 10.48014/ems.20230228002
Hu Cong, Xiao Yi, Junpeng Xu, Yao Siqi
Fiber-reinforced composites (FRP) have gradually become an important direction for the development of new materials due to their various excellent properties since their development. However, traditional glass fibers, carbon fibers, basalt fibers, etc. have various problems such as cost and environmental pollution, in contrast to natural crop fibers which are low-priced, widely available and environmentally friendly. In order to verify the service characteristics of jute fiber, one of the representatives of natural fibers, in complex environments, jute fiber reinforced composite laminates were prepared using Vacuum Assisted Resin Infusion (VARI) process, and the moisture absorption properties of the laminates were investigated and the influence law and mechanism of four temperatures and two fiber plies on the water absorption and diffusion properties of the laminates were analyzed. The results show that: the moisture absorption process of the laminate conforms to Fick’s second law, but the applicability of Fick’s second law decreases as the temperature increases; the moisture absorption rate of the laminate increases exponentially as the temperature increases, but the saturation rate decreases, and the corrosion rate of the laminate increases; the increase in the number of plies of the laminate affects the increase in the time to reach the saturation rate of the laminate, and the diffusion coefficient increases; the service performance of 6-layer laminate is better in the same hygrothermal environment.
{"title":"Study onThe Moisture Absorption Properties of jute Fiber Reinforced Composites","authors":"Hu Cong, Xiao Yi, Junpeng Xu, Yao Siqi","doi":"10.48014/ems.20230228002","DOIUrl":"https://doi.org/10.48014/ems.20230228002","url":null,"abstract":"Fiber-reinforced composites (FRP) have gradually become an important direction for the development of new materials due to their various excellent properties since their development. However, traditional glass fibers, carbon fibers, basalt fibers, etc. have various problems such as cost and environmental pollution, in contrast to natural crop fibers which are low-priced, widely available and environmentally friendly. In order to verify the service characteristics of jute fiber, one of the representatives of natural fibers, in complex environments, jute fiber reinforced composite laminates were prepared using Vacuum Assisted Resin Infusion (VARI) process, and the moisture absorption properties of the laminates were investigated and the influence law and mechanism of four temperatures and two fiber plies on the water absorption and diffusion properties of the laminates were analyzed. The results show that: the moisture absorption process of the laminate conforms to Fick’s second law, but the applicability of Fick’s second law decreases as the temperature increases; the moisture absorption rate of the laminate increases exponentially as the temperature increases, but the saturation rate decreases, and the corrosion rate of the laminate increases; the increase in the number of plies of the laminate affects the increase in the time to reach the saturation rate of the laminate, and the diffusion coefficient increases; the service performance of 6-layer laminate is better in the same hygrothermal environment.","PeriodicalId":42984,"journal":{"name":"Journal of Materials and Engineering Structures","volume":"57 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72682674","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 : 2023-06-28DOI: 10.48014/ems.20230511001
Liu Wei
Smart and Multifunctional Concrete toward Sustainable Infrastructures, published by Springer Group, is the first English monograph in the field of smart and multifunctional concrete, which contains 24 chapters organized into 3 parts. The first part introduces the definition, classification, origin, and philosophical basis of smart and multifunctional concrete. The second part describes 22 specific types of smart and multifunctional concrete in detail, including their definitions, classifications, principles, performances, and applications. The third part discusses the current challenges and strategies of smart and multifunctional concrete towards sustainable infrastructures. This monograph not only summarizes the historical development of smart and multifunctional concrete, but also elaborates on the philosophical basis for the emergence of smart and multifunctional concrete from the perspective of “entropy”. At the same time, it comprehensively introduces more than 20 types of smart and multifunctional concrete, as well as new types of smart and multifunctional concrete that have already been prototyped or are undergoing rapid development. Finally, the challenges of smart and multifunctional concrete towards sustainable infrastructure are systematically analysed, and corresponding strategies and development frameworks are proposed. This monograph can be used as a learning material for students majoring in civil engineering, especially in the field of concrete materials and structures, as well as a guidance and reference for researchers and engineers in the field of smart and multifunctional concrete.
{"title":"Book Review of Smart and Multifunctional Concrete toward Sustainable Infrastructure","authors":"Liu Wei","doi":"10.48014/ems.20230511001","DOIUrl":"https://doi.org/10.48014/ems.20230511001","url":null,"abstract":"Smart and Multifunctional Concrete toward Sustainable Infrastructures, published by Springer Group, is the first English monograph in the field of smart and multifunctional concrete, which contains 24 chapters organized into 3 parts. The first part introduces the definition, classification, origin, and philosophical basis of smart and multifunctional concrete. The second part describes 22 specific types of smart and multifunctional concrete in detail, including their definitions, classifications, principles, performances, and applications. The third part discusses the current challenges and strategies of smart and multifunctional concrete towards sustainable infrastructures. This monograph not only summarizes the historical development of smart and multifunctional concrete, but also elaborates on the philosophical basis for the emergence of smart and multifunctional concrete from the perspective of “entropy”. At the same time, it comprehensively introduces more than 20 types of smart and multifunctional concrete, as well as new types of smart and multifunctional concrete that have already been prototyped or are undergoing rapid development. Finally, the challenges of smart and multifunctional concrete towards sustainable infrastructure are systematically analysed, and corresponding strategies and development frameworks are proposed. This monograph can be used as a learning material for students majoring in civil engineering, especially in the field of concrete materials and structures, as well as a guidance and reference for researchers and engineers in the field of smart and multifunctional concrete.","PeriodicalId":42984,"journal":{"name":"Journal of Materials and Engineering Structures","volume":"38 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91176277","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 : 2023-03-28DOI: 10.48014/ems.20230424002
Zhiqiang Liu
Self-Sensing Concrete in Smart Structures, published by Elsevier, is the first English monograph in the field of self-sensing concrete and its smart structures. The monograph contains 11 chapters in 3 parts. The first part describes in detail the structure, composition, preparations, testing methods, sensing properties, sensing mechanisms, and smart structures of self-sensing concrete. The second part gives the results of the authors’ systematic research in the field of self-sensing concrete materials and smart structures from 2000 to 2014, including the self-sensing concrete with carbon fiber, nickel powder, and carbon nanotubes. The third part discusses the future challenges and countermeasures for the development of self-sensing concrete and its smart structures. The monograph not only provides a comprehensive introduction to the basic principles of self-sensing concrete and the research cases of self-sensing concrete-based smart structures applications, but also presents a series of representative innovative researches results of selfsensing concrete and its smart structures, as well as plans and deploys the future research and applications of self-sensing concrete and its smart structures. This monograph can provide guidance and reference for scientific researchers and engineers in the field of concrete materials and structures as well as smart materials and structures.
{"title":"Book Review of Self-Sensing Concrete in Smart Structures","authors":"Zhiqiang Liu","doi":"10.48014/ems.20230424002","DOIUrl":"https://doi.org/10.48014/ems.20230424002","url":null,"abstract":"Self-Sensing Concrete in Smart Structures, published by Elsevier, is the first English monograph in the field of self-sensing concrete and its smart structures. The monograph contains 11 chapters in 3 parts. The first part describes in detail the structure, composition, preparations, testing methods, sensing properties, sensing mechanisms, and smart structures of self-sensing concrete. The second part gives the results of the authors’ systematic research in the field of self-sensing concrete materials and smart structures from 2000 to 2014, including the self-sensing concrete with carbon fiber, nickel powder, and carbon nanotubes. The third part discusses the future challenges and countermeasures for the development of self-sensing concrete and its smart structures. The monograph not only provides a comprehensive introduction to the basic principles of self-sensing concrete and the research cases of self-sensing concrete-based smart structures applications, but also presents a series of representative innovative researches results of selfsensing concrete and its smart structures, as well as plans and deploys the future research and applications of self-sensing concrete and its smart structures. This monograph can provide guidance and reference for scientific researchers and engineers in the field of concrete materials and structures as well as smart materials and structures.","PeriodicalId":42984,"journal":{"name":"Journal of Materials and Engineering Structures","volume":"18 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81727081","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 : 2023-03-28DOI: 10.48014/ems.20230114001
Daocheng Zhou, Bo Zhang, D. Qiao
The foundation scour reduces the restraining effect of the foundation on the bridge foundation, resulting in the reduction of the lateral bearing capacity of the bridge foundation. For the cross-sea bridge, the dynamic effect of foundation scour on the bridge structure is more significant, thus affecting the safety of the structure. In this paper, the maximum possible local scouring depth of the foundation is first calculated to make the simulated foundation scouring condition conform. to the actual project. Then, the m-method is adopted to calculate the stiffness value of the foundation soil spring and establish an elastic restraint model that reflects the restraint of the foundation soil on the bridge foundation, thus setting up the finite element model of the bridge with regard to the foundation scouring. On this basis, taking Qiongzhou Strait cross-sea highway and railway dual-purpose cable-stayed bridge as an example, the effect of foundation scour on the dynamic effect of cross-sea cable-stayed bridges under the action of wind and waves is analyzed, and the influence law of the local scour depth of the foundation on the dynamic effect of the structure is determined. The maximum scour depth of 12m is considered to increase the displacement of the top of the tower by 14. 65%, mainly because the foundation scours reduces the restraint effect of the foundation soil on the bridge foundation, resulting in the reduction of the lateral bearing capacity of the bridge foundation. Therefore, for the cross-sea cable-stayed bridge without foundation soil treatment, the detection and monitoring of foundation scour should be strengthened or the preventive maintenance and reinforcement treatment of foundation soil should be done in advance to ensure the safe operation of the bridge structure.
{"title":"Analysis of the Effect of Local Foundation Scouring on the Structural Dynamic Effect of a Cable-Stayed Bridge Across The Sea","authors":"Daocheng Zhou, Bo Zhang, D. Qiao","doi":"10.48014/ems.20230114001","DOIUrl":"https://doi.org/10.48014/ems.20230114001","url":null,"abstract":"The foundation scour reduces the restraining effect of the foundation on the bridge foundation, resulting in the reduction of the lateral bearing capacity of the bridge foundation. For the cross-sea bridge, the dynamic effect of foundation scour on the bridge structure is more significant, thus affecting the safety of the structure. In this paper, the maximum possible local scouring depth of the foundation is first calculated to make the simulated foundation scouring condition conform. to the actual project. Then, the m-method is adopted to calculate the stiffness value of the foundation soil spring and establish an elastic restraint model that reflects the restraint of the foundation soil on the bridge foundation, thus setting up the finite element model of the bridge with regard to the foundation scouring. On this basis, taking Qiongzhou Strait cross-sea highway and railway dual-purpose cable-stayed bridge as an example, the effect of foundation scour on the dynamic effect of cross-sea cable-stayed bridges under the action of wind and waves is analyzed, and the influence law of the local scour depth of the foundation on the dynamic effect of the structure is determined. The maximum scour depth of 12m is considered to increase the displacement of the top of the tower by 14. 65%, mainly because the foundation scours reduces the restraint effect of the foundation soil on the bridge foundation, resulting in the reduction of the lateral bearing capacity of the bridge foundation. Therefore, for the cross-sea cable-stayed bridge without foundation soil treatment, the detection and monitoring of foundation scour should be strengthened or the preventive maintenance and reinforcement treatment of foundation soil should be done in advance to ensure the safe operation of the bridge structure.","PeriodicalId":42984,"journal":{"name":"Journal of Materials and Engineering Structures","volume":"461 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82984991","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：