The effects of ultrasonic impact peening (UIP) on the mechanical properties and fatigue strength of the AA1100 alloy were compared to those of the untreated alloy. The UIP technic is widely used in a variety of applications to increase the hardness, tensile strength, surface characteristics, and fatigue life of metals. Due to the plastic deformation of the surface layer, the UIP process generated compressive residual stresses in the metal's upper layers. Extensive investigations were carried out in order to determine the significant effect of the UIP process on the mechanical characteristics and fatigue life of the metal. According to the results of the experiment, the percentage of increase in ultimate tensile strength (UTS), yield stress, and hardness were 8 %, 7.05 %, and 9 %, respectively. A substantial improvement in fatigue life of the AA1100 alloy was seen as a result of this treatment when compared to the untreated samples. The results demonstrated that the UIP is a reliable approach for generating compressive residual stresses in the AA1100 alloys, which may have a favourable influence on the fatigue behaviour of the alloys.
{"title":"The influence of ultrasonic impact peening (UIP) on the mechanical properties and fatigue life of the AA1100 alloy","authors":"A. Mahmood, Samer A. Kokz, A. Mohsen","doi":"10.5937/jaes0-38125","DOIUrl":"https://doi.org/10.5937/jaes0-38125","url":null,"abstract":"The effects of ultrasonic impact peening (UIP) on the mechanical properties and fatigue strength of the AA1100 alloy were compared to those of the untreated alloy. The UIP technic is widely used in a variety of applications to increase the hardness, tensile strength, surface characteristics, and fatigue life of metals. Due to the plastic deformation of the surface layer, the UIP process generated compressive residual stresses in the metal's upper layers. Extensive investigations were carried out in order to determine the significant effect of the UIP process on the mechanical characteristics and fatigue life of the metal. According to the results of the experiment, the percentage of increase in ultimate tensile strength (UTS), yield stress, and hardness were 8 %, 7.05 %, and 9 %, respectively. A substantial improvement in fatigue life of the AA1100 alloy was seen as a result of this treatment when compared to the untreated samples. The results demonstrated that the UIP is a reliable approach for generating compressive residual stresses in the AA1100 alloys, which may have a favourable influence on the fatigue behaviour of the alloys.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79363675","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}
In the process of milling the profile of the vanes of a gas turbine engine on multi-operational machines, a technological scheme of transverse line shaping is used. According to this scheme, the vane rotates around its own axis, it is machined with a mill with a spherical working surface, which performs rotation and interpolated axial movement. The required parameters of the surface quality of the vane airfoil profile (profile accuracy and surface roughness parameter) are provided by assigning a combination of controlled processing parameters. However, today there are no recommendations on the calculation and assignment of combinations of controlled parameters for the milling of complex-profile surfaces, which is the profile of the flow path of the GTE compressor vanes. For each line and angle of rotation of the vane, the accuracy of the vane profile will be determined depending on the amount of vane deformation, which should not exceed the tolerance for its manufacture. In the course of the analysis of geometric relationships in the contact zone of the curved profile of the flow part of the vane and the mill with a spherical working surface, dependences were obtained to determine the magnitude of the force component during milling and its projection on the Y axis, as well as the effective diameter of the mill, which are necessary to calculate the magnitude of the total deformation of the vane. A methodology is proposed and analytical models are obtained for determining and assigning a combination of controlled parameters of the milling mode that provide a given accuracy of the vane airfoil profile when developing a control program for the vane milling process on a CNC machine.
{"title":"Prediction of GTE vanes deflection by analytical models of technical and geometric initial data in cross line milling on multi-axis CNC machines","authors":"V. Svirshchev, S. Tarasov, Vladislav Merezhnikov","doi":"10.5937/jaes0-39927","DOIUrl":"https://doi.org/10.5937/jaes0-39927","url":null,"abstract":"In the process of milling the profile of the vanes of a gas turbine engine on multi-operational machines, a technological scheme of transverse line shaping is used. According to this scheme, the vane rotates around its own axis, it is machined with a mill with a spherical working surface, which performs rotation and interpolated axial movement. The required parameters of the surface quality of the vane airfoil profile (profile accuracy and surface roughness parameter) are provided by assigning a combination of controlled processing parameters. However, today there are no recommendations on the calculation and assignment of combinations of controlled parameters for the milling of complex-profile surfaces, which is the profile of the flow path of the GTE compressor vanes. For each line and angle of rotation of the vane, the accuracy of the vane profile will be determined depending on the amount of vane deformation, which should not exceed the tolerance for its manufacture. In the course of the analysis of geometric relationships in the contact zone of the curved profile of the flow part of the vane and the mill with a spherical working surface, dependences were obtained to determine the magnitude of the force component during milling and its projection on the Y axis, as well as the effective diameter of the mill, which are necessary to calculate the magnitude of the total deformation of the vane. A methodology is proposed and analytical models are obtained for determining and assigning a combination of controlled parameters of the milling mode that provide a given accuracy of the vane airfoil profile when developing a control program for the vane milling process on a CNC machine.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84358734","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}
Electricity distribution managers are continuously under pressure to expand their grids to cope with load growth and properly supply their consumers. To achieve these objectives, it is necessary to provide an acceptable climate for the entry of solar resources and innovative operating practices. This work focuses on a study the impact of the insertion of photovoltaic energy into the low voltage distribution grid. We have shown the impact of weather conditions on the power injected into the grid, the impact of using a single-phase inverter with a TT-neutral regime, the flow of active and reactive bidirectional power to the point of common coupling PCC, and the impact of a grid connected photovoltaic system under different weather conditions and load types. This study was carried out using the Matlab Simulink environment for modeling and simulation of a single-phase system with a 3,5kW transformer inverter and the results show the impact of PV system integration on the overall and individual harmonic level of voltage and current considering several scenarios (variable solar irradiation, variable types of loads),the presence of filters such as the inductor and the capacitor in series or in parallel plays very important role on the improvement in the disturbance of the quality of the current and the tension.
{"title":"Impact of grid connected photovoltaic system under different weather conditions and load type","authors":"Rebai Asma, Z. Zahzouh, S. Boulahchiche","doi":"10.5937/jaes0-42456","DOIUrl":"https://doi.org/10.5937/jaes0-42456","url":null,"abstract":"Electricity distribution managers are continuously under pressure to expand their grids to cope with load growth and properly supply their consumers. To achieve these objectives, it is necessary to provide an acceptable climate for the entry of solar resources and innovative operating practices. This work focuses on a study the impact of the insertion of photovoltaic energy into the low voltage distribution grid. We have shown the impact of weather conditions on the power injected into the grid, the impact of using a single-phase inverter with a TT-neutral regime, the flow of active and reactive bidirectional power to the point of common coupling PCC, and the impact of a grid connected photovoltaic system under different weather conditions and load types. This study was carried out using the Matlab Simulink environment for modeling and simulation of a single-phase system with a 3,5kW transformer inverter and the results show the impact of PV system integration on the overall and individual harmonic level of voltage and current considering several scenarios (variable solar irradiation, variable types of loads),the presence of filters such as the inductor and the capacitor in series or in parallel plays very important role on the improvement in the disturbance of the quality of the current and the tension.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87241199","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}
Abderrahmane Djili, B. Bezzazi, Mohamed Habouss, N. Zioui
Precipitation hardening aluminium alloy sheets AA2017-T4 are welded by FSW on a conventional FSW tool. A macrograph of the cross section of the butt-welded joint shows the classical zones for such welding, namely the nugget zone, the thermo-mechanically affected zone and the heat affected zone. Scanning Electron Microscopy displays a grain refining and a re-formation of the precipitates in the nugget zone. Micro-hardness measurements on the cross-section perpendicular to the welding direction give the standard W-profile of the hardness for such welding, with as expected, the relatively highest value at the joint center (nugget zone). To assess the mechanical performance of the FSW welded joint, the Disk Pressure Test (DPT) is used. It shows a failure pressure for the welded specimen that is 17% lower than the base material. The fracture surface micrographs clearly show a thickness reduction at break that is ~36% higher for the base material than the welding joint and a ductile fracture mode for both specimens.
{"title":"Assessment of friction stir welding joints of AA2017-T4 aluminum by disc pressure mechanical tests","authors":"Abderrahmane Djili, B. Bezzazi, Mohamed Habouss, N. Zioui","doi":"10.5937/jaes0-41037","DOIUrl":"https://doi.org/10.5937/jaes0-41037","url":null,"abstract":"Precipitation hardening aluminium alloy sheets AA2017-T4 are welded by FSW on a conventional FSW tool. A macrograph of the cross section of the butt-welded joint shows the classical zones for such welding, namely the nugget zone, the thermo-mechanically affected zone and the heat affected zone. Scanning Electron Microscopy displays a grain refining and a re-formation of the precipitates in the nugget zone. Micro-hardness measurements on the cross-section perpendicular to the welding direction give the standard W-profile of the hardness for such welding, with as expected, the relatively highest value at the joint center (nugget zone). To assess the mechanical performance of the FSW welded joint, the Disk Pressure Test (DPT) is used. It shows a failure pressure for the welded specimen that is 17% lower than the base material. The fracture surface micrographs clearly show a thickness reduction at break that is ~36% higher for the base material than the welding joint and a ductile fracture mode for both specimens.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78221464","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}
This paper investigated the behavior of reinforced concrete (RC) beams of near surface mounted (NSM) strengthening technique with using steel bar and hybrid steel bar. The effects of NSM reinforcement and load patterns on the flexural behavior and ductility of the RC beams have been studied. A four-point bending test was carried out on five reinforced concrete beams divided into two groups. The first group was tested under the effect of static load, whereas the second group was tested under repeated load. The experimental results are reported regarding the failure mode, flexural strength, load-deflection response, cracking behavior, and ductility. These results showed that strengthening of concrete beams with NSM steel bar increased the yielding and ultimate loads by about 28.6% and 28.5% respectively as compared to control beam, whereas the yielding and ultimate load increased to 33% and 35.7% over the control beam when strengthened with hybrid NSM steel bar. The ductility index of the control beam was equal to 2.6, this value increased to about 24.6% and 52.3% of the NSM steel bar and NSM hybrid steel bar strengthened beams respectively. The repeated load decreased the load capacity of the strengthened hybrid beams by about 65%, whereas the mid-span deflection is nearly the same.
{"title":"FLEXURAL BEHAVIOR OF REINFORCED CONCRETE BEAMS STRENGTHENED WITH HYBRID STEEL- FRP REINFORCEMENTS BY USING NEAR SURFACE MOUNTED TECHNIQUE","authors":"Suhaib Sabah Abdulhameed, Dina Mukheef Hamza","doi":"10.5937/jaes0-39645","DOIUrl":"https://doi.org/10.5937/jaes0-39645","url":null,"abstract":"This paper investigated the behavior of reinforced concrete (RC) beams of near surface mounted (NSM) strengthening technique with using steel bar and hybrid steel bar. The effects of NSM reinforcement and load patterns on the flexural behavior and ductility of the RC beams have been studied. A four-point bending test was carried out on five reinforced concrete beams divided into two groups. The first group was tested under the effect of static load, whereas the second group was tested under repeated load. The experimental results are reported regarding the failure mode, flexural strength, load-deflection response, cracking behavior, and ductility. These results showed that strengthening of concrete beams with NSM steel bar increased the yielding and ultimate loads by about 28.6% and 28.5% respectively as compared to control beam, whereas the yielding and ultimate load increased to 33% and 35.7% over the control beam when strengthened with hybrid NSM steel bar. The ductility index of the control beam was equal to 2.6, this value increased to about 24.6% and 52.3% of the NSM steel bar and NSM hybrid steel bar strengthened beams respectively. The repeated load decreased the load capacity of the strengthened hybrid beams by about 65%, whereas the mid-span deflection is nearly the same.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136216919","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}
S Saloma, Siti Nurjannah, H Hanafiah, Arie Usman, Steven Hu, Fathoni Usman
Masonry walls are non-structural elements that can increase the stiffness and strength of building structures subjected to lateral loads. Reinforced concrete (RC) wall systems are structural elements that have been developed to improve structural performance. Because the use of large amounts of cement in RC is not environmentally friendly, cement-free concrete called geopolymer concrete (GC) has been developed. Research on GC structural beam-column joints and slab joints has proven that GC fulfils the strength requirements for structural elements. However, previous studies have not addressed the performance of reinforced GC wall panels (WPs) under cyclic loads. Therefore, this study filled the gap with the novelty of investigating the performance of reinforced GC structural WPs subjected to cyclic lateral loads. Numerical analysis was used to determine the performance of GC-WPs in resisting cyclic lateral loads, and an aerated concrete wall panel (AC-WP) model was used for verification. The study investigated GC-WPs that were 1500 mm wide and 200 mm thick, varying in solidity such that one was entirely solid (GC-WP1) and two had square openings in horizontal and vertical configurations (GC-WP2 and GC-WP3, respectively). The cyclic loading history referenced FEMA 461. The analysis resulted in hysteretic curves, ductility ratios, and stress contours. GC-WP1 achieved the highest maximum lateral loads (73,994 kN and-67,225 kN) compared to the other GC-WP models, with a high ductility ratio of 14,681. Results show that GC has the potential for use in WPs to improve their resistance to lateral cyclic loads.
{"title":"Behavior of geopolymer concrete wall panels with square opening variations subjected to cyclic loads","authors":"S Saloma, Siti Nurjannah, H Hanafiah, Arie Usman, Steven Hu, Fathoni Usman","doi":"10.5937/jaes0-43777","DOIUrl":"https://doi.org/10.5937/jaes0-43777","url":null,"abstract":"Masonry walls are non-structural elements that can increase the stiffness and strength of building structures subjected to lateral loads. Reinforced concrete (RC) wall systems are structural elements that have been developed to improve structural performance. Because the use of large amounts of cement in RC is not environmentally friendly, cement-free concrete called geopolymer concrete (GC) has been developed. Research on GC structural beam-column joints and slab joints has proven that GC fulfils the strength requirements for structural elements. However, previous studies have not addressed the performance of reinforced GC wall panels (WPs) under cyclic loads. Therefore, this study filled the gap with the novelty of investigating the performance of reinforced GC structural WPs subjected to cyclic lateral loads. Numerical analysis was used to determine the performance of GC-WPs in resisting cyclic lateral loads, and an aerated concrete wall panel (AC-WP) model was used for verification. The study investigated GC-WPs that were 1500 mm wide and 200 mm thick, varying in solidity such that one was entirely solid (GC-WP1) and two had square openings in horizontal and vertical configurations (GC-WP2 and GC-WP3, respectively). The cyclic loading history referenced FEMA 461. The analysis resulted in hysteretic curves, ductility ratios, and stress contours. GC-WP1 achieved the highest maximum lateral loads (73,994 kN and-67,225 kN) compared to the other GC-WP models, with a high ductility ratio of 14,681. Results show that GC has the potential for use in WPs to improve their resistance to lateral cyclic loads.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135103454","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}
Bio-composites have become increasingly popular as a substitute for synthetic fibers over the last decade due to their eco-friendly nature. To utilize them effectively in engineering applications, particularly in the automotive industry, a thorough understanding of the material properties is necessary. This experimental investigation focuses on exploring the vibration-damping and acoustic properties of fiber composites made from hemp natural fiber and epoxy resin. The study involved the preparation of composite specimens using both short and long fibers through a hand layup process. The natural frequency and damping ratio of the specimen were computed from time-domain experimental data. The sound absorption coefficient of fiber specimens was determined in the frequency range of 63 Hz to 6300 Hz by using the impedance tube technique. The analysis revealed that the pre-treatment of fiber and the use of long fiber rather than short fiber enhances the damping properties of hemp fiber composites. Immersion of specimens in water resulted in the degradation of damping properties. Acoustic tests clearly showed that the ageing process affected short-treated fiber composites more significantly when compared to long-treated fiber composites.
{"title":"INFLUENCE OF FIBER LENGTH AND MOISTURE CONTENT ON SOUND AND VIBRATION CHARACTERISTICS OF HEMP/EPOXY COMPOSITES","authors":"Raman Singh, Sandesh Nayak, Sriharsha Hegde, Padmaraj NH","doi":"10.5937/jaes0-44872","DOIUrl":"https://doi.org/10.5937/jaes0-44872","url":null,"abstract":"Bio-composites have become increasingly popular as a substitute for synthetic fibers over the last decade due to their eco-friendly nature. To utilize them effectively in engineering applications, particularly in the automotive industry, a thorough understanding of the material properties is necessary. This experimental investigation focuses on exploring the vibration-damping and acoustic properties of fiber composites made from hemp natural fiber and epoxy resin. The study involved the preparation of composite specimens using both short and long fibers through a hand layup process. The natural frequency and damping ratio of the specimen were computed from time-domain experimental data. The sound absorption coefficient of fiber specimens was determined in the frequency range of 63 Hz to 6300 Hz by using the impedance tube technique. The analysis revealed that the pre-treatment of fiber and the use of long fiber rather than short fiber enhances the damping properties of hemp fiber composites. Immersion of specimens in water resulted in the degradation of damping properties. Acoustic tests clearly showed that the ageing process affected short-treated fiber composites more significantly when compared to long-treated fiber composites.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135594688","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}
The authors affiliation was misprinted within the article in subject published in 20(2022)3, 974, 673-687, DOI:10.5937/jaes0-35499. Authors' affiliation should be corrected as follows: Dian M. Setiawan Department of Civil Engineering, Universitas Muhammadiyah Yogyakarta, Jl. Brawijaya, Bantul, Yogyakarta, Indonesia *diansetiawanm@ft.umy.ac.id. This addition does not affect the original paper. We apologize for any inconvenience that this may have caused.
作者隶属关系在20(2022)394,974,673 -687发表的主题文章中出现印刷错误，DOI:10.5937/ jes0 -35499。作者所属单位更正如下:Dian M. Setiawan, Universitas Muhammadiyah Yogyakarta, Jl.土木工程系印度尼西亚日惹，班图尔，布拉维贾亚*diansetiawanm@ft.umy.ac.id。这一添加不影响原论文。对于由此造成的不便，我们深表歉意。
{"title":"Corrigendum: Investigation of conventional and asphaltic underlayment track behaviors subjected to freight train load: Mechanistic approach (2022, vol. 20, br. 3, str. 673-687)","authors":"D. Setiawan","doi":"10.5937/jaes0-43311","DOIUrl":"https://doi.org/10.5937/jaes0-43311","url":null,"abstract":"The authors affiliation was misprinted within the article in subject published in 20(2022)3, 974, 673-687, DOI:10.5937/jaes0-35499. Authors' affiliation should be corrected as follows: Dian M. Setiawan Department of Civil Engineering, Universitas Muhammadiyah Yogyakarta, Jl. Brawijaya, Bantul, Yogyakarta, Indonesia *diansetiawanm@ft.umy.ac.id. This addition does not affect the original paper. We apologize for any inconvenience that this may have caused.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80160770","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}
Anastasia Shevtsova, Aleksandr Novikov, Sergey Evtyukov, Alexey Marusin
When working with accident rates, a specialist has to spend quite a lot of time to establish the main places of accidents, certain conditions in which they occurred, which is extremely necessary when determining measures aimed at reducing road accidents. As a result of the research, the authors processed a large amount of data - accident rates for 2015-2021, as a result of which certain dependencies were established between the considered indicators in relative data, which made it possible to develop a probabilistic model for calculating the necessary data with the ability to determine the required conditions. Based on the results obtained, the authors developed an algorithm, according to which procedures were determined when working with accident rates and an assessment of efficiency based on the calculation of the error was carried out. The results obtained allowed us to conclude that the developed probabilistic model and algorithm are effective, in view of the minimum error.
{"title":"PROBABILISTIC MODEL FOR ASSESSING ACCIDENT RATES","authors":"Anastasia Shevtsova, Aleksandr Novikov, Sergey Evtyukov, Alexey Marusin","doi":"10.5937/jaes0-42942","DOIUrl":"https://doi.org/10.5937/jaes0-42942","url":null,"abstract":"When working with accident rates, a specialist has to spend quite a lot of time to establish the main places of accidents, certain conditions in which they occurred, which is extremely necessary when determining measures aimed at reducing road accidents. As a result of the research, the authors processed a large amount of data - accident rates for 2015-2021, as a result of which certain dependencies were established between the considered indicators in relative data, which made it possible to develop a probabilistic model for calculating the necessary data with the ability to determine the required conditions. Based on the results obtained, the authors developed an algorithm, according to which procedures were determined when working with accident rates and an assessment of efficiency based on the calculation of the error was carried out. The results obtained allowed us to conclude that the developed probabilistic model and algorithm are effective, in view of the minimum error.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135549339","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}
Bassam Mahasneh, Omer N. Maaitah, Nafeth Abdel Hadi, Hmood Mubaydeen, Omar K. Alghazawi, Nidhal M. Saada
Some Clayey soil in Alkarak is stabilized using Cement and natural resources including zeolites and Dead Sea Sand (DSS) (south of Jordan). To examine how different additives can be used to improve the mechanical and physical qualities of problematic clayey soil, field and laboratory experiments have been done. Clayey soils are surface deposits that vary in thickness and mineral makeup. With varying percentages, the two main components are kaolinite and montmorillonite. Due to Jordan's semi-arid location and the soil's unsaturated state, Clayey soils are very vulnerable to changes in moisture content due to their sheet-like structure. As a result, infiltration depth varies depending on the area. The Ca-montmorillonite content and moisture content, which change between the summer and winter seasons, determine how troublesome Clayey soils respond, including swelling and shrinkage to varying degrees. Utilizing 4% (DSS), 12% (Zeolites), and up to 12% (Ordinary Portland Cement) improved the physical and mechanical qualities of the examined clayey soil. The Clayey soil could be improved by the 4% fixing percentage of (DSS). 12% of zeolites, meanwhile, improve the clayey soil's qualities. The physical characteristics of Clayey soil could be enhanced by mixing up to 12% ordinary Portland cement with it.
{"title":"UTILIZING NATURAL ADDITIVES IN STABILIZING CLAYEY SOIL","authors":"Bassam Mahasneh, Omer N. Maaitah, Nafeth Abdel Hadi, Hmood Mubaydeen, Omar K. Alghazawi, Nidhal M. Saada","doi":"10.5937/jaes0-39089","DOIUrl":"https://doi.org/10.5937/jaes0-39089","url":null,"abstract":"Some Clayey soil in Alkarak is stabilized using Cement and natural resources including zeolites and Dead Sea Sand (DSS) (south of Jordan). To examine how different additives can be used to improve the mechanical and physical qualities of problematic clayey soil, field and laboratory experiments have been done. Clayey soils are surface deposits that vary in thickness and mineral makeup. With varying percentages, the two main components are kaolinite and montmorillonite. Due to Jordan's semi-arid location and the soil's unsaturated state, Clayey soils are very vulnerable to changes in moisture content due to their sheet-like structure. As a result, infiltration depth varies depending on the area. The Ca-montmorillonite content and moisture content, which change between the summer and winter seasons, determine how troublesome Clayey soils respond, including swelling and shrinkage to varying degrees. Utilizing 4% (DSS), 12% (Zeolites), and up to 12% (Ordinary Portland Cement) improved the physical and mechanical qualities of the examined clayey soil. The Clayey soil could be improved by the 4% fixing percentage of (DSS). 12% of zeolites, meanwhile, improve the clayey soil's qualities. The physical characteristics of Clayey soil could be enhanced by mixing up to 12% ordinary Portland cement with it.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135551074","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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