SECOND INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE, SMART STRUCTURES AND APPLICATIONS: ICMSS-2019最新文献

{"title":"A mathematical model that describes the electricity dynamic or voltage in high-voltage wires","authors":"K. Titov","doi":"10.1063/1.5140129","DOIUrl":"https://doi.org/10.1063/1.5140129","url":null,"abstract":"We considered the mathematical model, which implementation is presented in the Maple computer mathematics system. The technogenic situation in a high-voltage power line when with a wire break could be possible analogue of this model. One would like to know what processes occurred in this case - their time and voltage peaks in the network, which will help to predict and assess the possible consequences and eliminate or neutralize them in time. The model could be successfully used in the format of digital technologies in education, for example, in such specialties as “Ecology and Industrial Safety”, etc.We considered the mathematical model, which implementation is presented in the Maple computer mathematics system. The technogenic situation in a high-voltage power line when with a wire break could be possible analogue of this model. One would like to know what processes occurred in this case - their time and voltage peaks in the network, which will help to predict and assess the possible consequences and eliminate or neutralize them in time. The model could be successfully used in the format of digital technologies in education, for example, in such specialties as “Ecology and Industrial Safety”, etc.","PeriodicalId":182421,"journal":{"name":"SECOND INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE, SMART STRUCTURES AND APPLICATIONS: ICMSS-2019","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115294713","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}

{"title":"Temperature and structure numerical analysis in the overlaying of a bimetallic roll","authors":"A. M. Pokrovskiy, A. Chermoshentseva, E. Dubovitskiy","doi":"10.1063/1.5140114","DOIUrl":"https://doi.org/10.1063/1.5140114","url":null,"abstract":"A model was created describing the field of temperatures and distribution of the phase and structural composition in a bimetallic casting roller throughout the built-in welding process. The non-linear and non-static problem of thermal conductivity is solved using a method based on finite elements. Limit conditions of the third kind are used to describe the conditions of thermal conductivity. Heat emitted at phase and structural transitions is taken into account. It was assumed that heat physics coefficients depend on the temperature and structure. Liquid-to-solid transition was modelled using linear approximation. Avrami equation was used to describe the kinetics of austenite-to-perlite transition. The transition between the isothermal kinetics of the austenite degradation to the non-isothermal conditions was calculated using the theory of isokinetic reaction, using the additivity rule. The results for the calculation of temperatures and structures throughout the build-up welding process are presented. The software developed in the course of this research can be used for numeric modelling of the strained and deformed casting roller during the build-up welding.A model was created describing the field of temperatures and distribution of the phase and structural composition in a bimetallic casting roller throughout the built-in welding process. The non-linear and non-static problem of thermal conductivity is solved using a method based on finite elements. Limit conditions of the third kind are used to describe the conditions of thermal conductivity. Heat emitted at phase and structural transitions is taken into account. It was assumed that heat physics coefficients depend on the temperature and structure. Liquid-to-solid transition was modelled using linear approximation. Avrami equation was used to describe the kinetics of austenite-to-perlite transition. The transition between the isothermal kinetics of the austenite degradation to the non-isothermal conditions was calculated using the theory of isokinetic reaction, using the additivity rule. The results for the calculation of temperatures and structures throughout the build-up welding process are presented. Th...","PeriodicalId":182421,"journal":{"name":"SECOND INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE, SMART STRUCTURES AND APPLICATIONS: ICMSS-2019","volume":"157 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124398010","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}

{"title":"Mathematical apparatus for engineering-linguistic models","authors":"N. Sidnyaev, Ju. I. Butenko, V. V. Garazha","doi":"10.1063/1.5140133","DOIUrl":"https://doi.org/10.1063/1.5140133","url":null,"abstract":"The article deals with the influence of special sections of mathematics on linguistic theory and practice from the standpoint of modeling, based on the similarity of the model and the object, and includes the construction of the model, its study and transfer of the information to the simulated object. Sectors of penetration of mathematical methods in linguistics are shown. The conditions for the choice of linguistic models, as well as the types of linguistic-mathematical models: ideal and reproducing are described. Given the methodological function of engineering linguistics. Special sections of mathematics used in linguistic theory and practice are considered. The paradoxes of rejection by the language of frontal machine formalization are listed.The article deals with the influence of special sections of mathematics on linguistic theory and practice from the standpoint of modeling, based on the similarity of the model and the object, and includes the construction of the model, its study and transfer of the information to the simulated object. Sectors of penetration of mathematical methods in linguistics are shown. The conditions for the choice of linguistic models, as well as the types of linguistic-mathematical models: ideal and reproducing are described. Given the methodological function of engineering linguistics. Special sections of mathematics used in linguistic theory and practice are considered. The paradoxes of rejection by the language of frontal machine formalization are listed.","PeriodicalId":182421,"journal":{"name":"SECOND INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE, SMART STRUCTURES AND APPLICATIONS: ICMSS-2019","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125234592","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}

{"title":"Construction of the simplified analytical solution of the flat punch indentation contact problem","authors":"A. Vasiliev, E. Sadyrin, S. Volkov, E. Kislyakov, I. Sevostianov","doi":"10.1063/1.5138426","DOIUrl":"https://doi.org/10.1063/1.5138426","url":null,"abstract":"The paper is devoted to the construction of the approximated solution for the flat-ended circular punch indentation contact problem for an elastic isotropic half-space with a coating. We assume the coating to be either homogeneous (elastic moduli are constant) or functionally graded (elastic moduli vary by depth). The solution of the problem is constructed using the bilateral asymptotic method. One-parameter approximation of the kernel transform of the integral equation is used to obtain explicit analytical expressions for the contact stresses distribution as well as the load-displacement dependence in a simplified form, which is convenient for engineering calculations. The accuracy analysis of the obtained solution is carried out on example of a series of homogeneous and functionally graded coatings. The influence of a parameter characterizing the relative Young’s modulus of the coating and the law of variation of Young’s modulus in depth on the accuracy of the simplified is analyzed.The paper is devoted to the construction of the approximated solution for the flat-ended circular punch indentation contact problem for an elastic isotropic half-space with a coating. We assume the coating to be either homogeneous (elastic moduli are constant) or functionally graded (elastic moduli vary by depth). The solution of the problem is constructed using the bilateral asymptotic method. One-parameter approximation of the kernel transform of the integral equation is used to obtain explicit analytical expressions for the contact stresses distribution as well as the load-displacement dependence in a simplified form, which is convenient for engineering calculations. The accuracy analysis of the obtained solution is carried out on example of a series of homogeneous and functionally graded coatings. The influence of a parameter characterizing the relative Young’s modulus of the coating and the law of variation of Young’s modulus in depth on the accuracy of the simplified is analyzed.","PeriodicalId":182421,"journal":{"name":"SECOND INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE, SMART STRUCTURES AND APPLICATIONS: ICMSS-2019","volume":"14 s3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120837407","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}

{"title":"Enhancement of drain current in AlGaN/GaN HEMT using AlN passivation","authors":"L. Arivazhagan, D. Nirmal, J. Ajayan, D. Godfrey, J. Rajkumar, S. B. Lakshmi","doi":"10.1063/1.5141433","DOIUrl":"https://doi.org/10.1063/1.5141433","url":null,"abstract":"AlGaN/GaN HEMT with AlN passivation is proposed and investigated. Effectiveness of AlN passivation is analyzed and compared with SiN, SiO2, Al2O3, and HfO2 passivation materials. The performance of these passivation materials are analyzed using Technological Computer Aided Design (TCAD) simulation. The potential, polarization charge, energy band diagram of the GaN HEMT are analyzed. GaN device with AlN passivation exhibits higher drain current than other passivation materials. Hence, AlN passivation is an excellent passivation material for GaN-HEMT in higher drive current application.","PeriodicalId":182421,"journal":{"name":"SECOND INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE, SMART STRUCTURES AND APPLICATIONS: ICMSS-2019","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124893247","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}

{"title":"The development of a concept for automatic control of a heterogeneous group of agricultural robots","authors":"V. V. Serebrenniy, N. V. Svertilov","doi":"10.1063/1.5140143","DOIUrl":"https://doi.org/10.1063/1.5140143","url":null,"abstract":"This article is devoted to the development of a general concept of the work of an autonomous robotic system based on a heterogeneous group of agricultural robots. Existing researches in the field of robotization of the agro-industrial complex were considered and their comparative analysis was carried out. The basic functional requirements for the operation of the system were formulated. A general concept of the system was developed.This article is devoted to the development of a general concept of the work of an autonomous robotic system based on a heterogeneous group of agricultural robots. Existing researches in the field of robotization of the agro-industrial complex were considered and their comparative analysis was carried out. The basic functional requirements for the operation of the system were formulated. A general concept of the system was developed.","PeriodicalId":182421,"journal":{"name":"SECOND INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE, SMART STRUCTURES AND APPLICATIONS: ICMSS-2019","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125154267","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}

{"title":"New methods of seeds functional state and activity control for the development of the biotechnical feedback concept","authors":"E. Klyuchka, D. Kuznetsov, V. Dudnik, A. Lukyanov, V. Gaponov","doi":"10.1063/1.5138408","DOIUrl":"https://doi.org/10.1063/1.5138408","url":null,"abstract":"The practical implementation of the methods of analysis of the functional state of the biotechnological system is considered. It is shown that the indicator of habitat assessment can be the plants themselves, which reflect all the changes. Biotechnical feedback is a source for the Databases formation in the biotechnological system. The hypothesis was offered that the productivity of plants, which depends on three elements of the light environment (spectrum, intensity, time of exposure). A system for experimental studies on light stimulation of vegetable and green crops has been developed. The results of studies showing the influence of different light stimulation spectra are presented. Method of acoustic signals of seeds (method of acoustic emission in a liquid) was proposed to determine the functional activity of seeds. An experimental system was created to detect the generated acoustic waves at the initial stage of plant ontogenesis. Thus biotechnological systems for growing plants in an artificial microclimate should be built on the basis of biotechnical feedback.The practical implementation of the methods of analysis of the functional state of the biotechnological system is considered. It is shown that the indicator of habitat assessment can be the plants themselves, which reflect all the changes. Biotechnical feedback is a source for the Databases formation in the biotechnological system. The hypothesis was offered that the productivity of plants, which depends on three elements of the light environment (spectrum, intensity, time of exposure). A system for experimental studies on light stimulation of vegetable and green crops has been developed. The results of studies showing the influence of different light stimulation spectra are presented. Method of acoustic signals of seeds (method of acoustic emission in a liquid) was proposed to determine the functional activity of seeds. An experimental system was created to detect the generated acoustic waves at the initial stage of plant ontogenesis. Thus biotechnological systems for growing plants in an artificial micr...","PeriodicalId":182421,"journal":{"name":"SECOND INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE, SMART STRUCTURES AND APPLICATIONS: ICMSS-2019","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126176875","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}

{"title":"Numerical study of a high-pressure turbine stage with inlet distortions","authors":"Marco Bicchi, L. Pinelli, M. Marconcini, P. Gaetani, G. Persico","doi":"10.1063/1.5138753","DOIUrl":"https://doi.org/10.1063/1.5138753","url":null,"abstract":"The study of inlet flow distortion (hot streaks and entropy waves) propagation through high-pressure turbine (HPT) stages is an open topic for aero-engine design, due to their multiple effects on aerodynamics, heat exchange and noise generation. The request to design compact and lightweight systems has recently led to a reduction of the combustor-turbine axial gap, making the interaction between the HPT and the combustor extremely critical. For this reason, the main aim of the present work is to numerically study how different clocking positions between temperature distortions and stator vanes can affect the evolution of hot streaks and entropy waves. In order to validate the numerical results, experimental data coming from an un-cooled high-pressure gas turbine stage tested at the Laboratorio di Fluidodinamica delle Macchine (LFM) of the Politecnico di Milano (Italy) has been used. The good agreement between numerical results and experimental data confirms the accuracy of the approach based on the CFD TRAF code and suggests recommendations for the design of the following rows.The study of inlet flow distortion (hot streaks and entropy waves) propagation through high-pressure turbine (HPT) stages is an open topic for aero-engine design, due to their multiple effects on aerodynamics, heat exchange and noise generation. The request to design compact and lightweight systems has recently led to a reduction of the combustor-turbine axial gap, making the interaction between the HPT and the combustor extremely critical. For this reason, the main aim of the present work is to numerically study how different clocking positions between temperature distortions and stator vanes can affect the evolution of hot streaks and entropy waves. In order to validate the numerical results, experimental data coming from an un-cooled high-pressure gas turbine stage tested at the Laboratorio di Fluidodinamica delle Macchine (LFM) of the Politecnico di Milano (Italy) has been used. The good agreement between numerical results and experimental data confirms the accuracy of the approach based on the CFD TR...","PeriodicalId":182421,"journal":{"name":"SECOND INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE, SMART STRUCTURES AND APPLICATIONS: ICMSS-2019","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126769949","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}

{"title":"Civil aero-engine performance prediction using a low-order code and uncertainty quantification estimation","authors":"Matteo Poggiali, Andrea Gamannossi, L. Langone, A. Amerini","doi":"10.1063/1.5138863","DOIUrl":"https://doi.org/10.1063/1.5138863","url":null,"abstract":"In the last decades, the attention for pollutant emissions in the civil air transport field has grown up continuously. Especially considering the performances of current turbofan engines, even a modest increase in overall efficiency can lead to great benefits in terms of emissions reduction. Therefore, dedicated performance prediction tools are mandatory in order to carry out an estimation of such outputs. The aim of the present study is to develop a procedure devoted to a preliminary output prediction of an aero engine for civil transportation and an uncertainty quantification analysis based on main performance parameters. For the first step, following the strategy already adopted in previous work on this topic [1], the GEnX, a high-bypass turbofan engine, has been considered as the reference cases. The main design characteristics available from the constructor for this engine have been employed to model the engine with a 0-D numerical tool (ESMS), developed by the University of Florence [2]. Great effor...","PeriodicalId":182421,"journal":{"name":"SECOND INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE, SMART STRUCTURES AND APPLICATIONS: ICMSS-2019","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115068536","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}

{"title":"Dynamic processes in the machine drive with safety clutch","authors":"M. Shishkarev, A. Rybak","doi":"10.1063/1.5138477","DOIUrl":"https://doi.org/10.1063/1.5138477","url":null,"abstract":"The relevance of the research topic is that the problem of reliable protection of components and parts from emerging overloads with the help of safety couplings is currently not solved. The problem of research - the definition of a rational layout of the drive. The purpose of the work is to establish a pattern of distribution and change of load in the drive of the machine containing a safety clutch. The method of research is to study the effect of increase rate of the overload on the working body of the machine and its distribution along the kinematic chain of the drive on the level of protection of the safety clutch. It is established that the safety clutch is not able to protect against overload components and parts of the drive, located between the working body and the clutch, if the propagation time of the shock wave is greater than the period of time during which there is an increase in overload on the working body from zero to the maximum value. Based on the study of the load distribution in the drive with a safety clutch when overload occurs on the working body of the machine, the conditions for the performance and failure of the safety clutch to protect the various parts of the drive are found.The relevance of the research topic is that the problem of reliable protection of components and parts from emerging overloads with the help of safety couplings is currently not solved. The problem of research - the definition of a rational layout of the drive. The purpose of the work is to establish a pattern of distribution and change of load in the drive of the machine containing a safety clutch. The method of research is to study the effect of increase rate of the overload on the working body of the machine and its distribution along the kinematic chain of the drive on the level of protection of the safety clutch. It is established that the safety clutch is not able to protect against overload components and parts of the drive, located between the working body and the clutch, if the propagation time of the shock wave is greater than the period of time during which there is an increase in overload on the working body from zero to the maximum value. Based on the study of the load distribution in the dri...","PeriodicalId":182421,"journal":{"name":"SECOND INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE, SMART STRUCTURES AND APPLICATIONS: ICMSS-2019","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122768351","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}