A number of accidents, such as the partial collapse of a residential building in Surfside on June 24, 2021, or the collapse of the roof structure of Basmanny Market in Moscow on February 23, 2006, show that aggressive medium impacts on reinforced concrete structures lead over time to a decrease in their strength resistance resource under accidental impacts. At the same time, the investigations in this field mainly deal with structural members under bending, while eccentrically compressed and corroded reinforced concrete members have been considered either in particular aspects or the obtained solutions are rather complicated for their practical application. In this regard, the purpose of the article was to assess the influence of the corroded depth on the load capacity of eccentrically compressed reinforced concrete columns of structural frames, as well as to predict the time of exhaustion of their load capacity under constant serviceable loads. The paper adopted the phenomenological model of V.M. Bondarenko to take into account long-term corrosion processes. It had been established that an increase in the corroded depth leads to a decrease in the load capacity of eccentrically compressed reinforced concrete members due to a decrease in the effective cross-sectional depth and effective slenderness ratio. The relative depth of the destroyed concrete varies depending on the current stress-strain state of the structural member. The time to reach the critical corroded depth depends significantly on the parameters of aggressive medium and the stress-strain state of the structural member and may differ by several times when implementing avalanche or descending damage kinetics.
{"title":"EXPOSURE OF THE LOAD CAPACITY OF THE RC STRUCTURAL SYSTEM UNDER CORROSION DAMAGE TO COLUMNS","authors":"","doi":"10.5937/jaes0-40956","DOIUrl":"https://doi.org/10.5937/jaes0-40956","url":null,"abstract":"A number of accidents, such as the partial collapse of a residential building in Surfside on June 24, 2021, or the collapse of the roof structure of Basmanny Market in Moscow on February 23, 2006, show that aggressive medium impacts on reinforced concrete structures lead over time to a decrease in their strength resistance resource under accidental impacts. At the same time, the investigations in this field mainly deal with structural members under bending, while eccentrically compressed and corroded reinforced concrete members have been considered either in particular aspects or the obtained solutions are rather complicated for their practical application. In this regard, the purpose of the article was to assess the influence of the corroded depth on the load capacity of eccentrically compressed reinforced concrete columns of structural frames, as well as to predict the time of exhaustion of their load capacity under constant serviceable loads. The paper adopted the phenomenological model of V.M. Bondarenko to take into account long-term corrosion processes. It had been established that an increase in the corroded depth leads to a decrease in the load capacity of eccentrically compressed reinforced concrete members due to a decrease in the effective cross-sectional depth and effective slenderness ratio. The relative depth of the destroyed concrete varies depending on the current stress-strain state of the structural member. The time to reach the critical corroded depth depends significantly on the parameters of aggressive medium and the stress-strain state of the structural member and may differ by several times when implementing avalanche or descending damage kinetics.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87760142","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}
V. Mishchenko, A. Semenov, N. Bredikhina, A. Bredikhin
The article deals with the problem of using artificial intelligence (AI) in the construction sector, since these systems are not being actively implemented, though AI capabilities can significantly simplify the entire process of erecting buildings and structures, including the development of improved business plans, adjusting the progress of the project directly on the construction site, making suggestions for management decisions in case of deviations from schedules and logistics plans. The experience of Chinese and domestic construction organizations in this area has been studied. A scheme for the implementation of an artificial intelligence system in construction production has been developed, the necessary resources for the development of machine learning in this area have been analyzed. It is concluded that for correct decision-making it is necessary to apply the principles of discrete mathematics, in particular, the distribution of expert assessments accepted as linguistic variables on the Harrington desirability scale with the construction of the membership function.
{"title":"EXPERIENCE IN THE USE OF ARTIFICIAL INTELLIGENCE IN MAKING MANAGERIAL DECISIONS IN THE CONSTRUCTION OF REAL ESTATE","authors":"V. Mishchenko, A. Semenov, N. Bredikhina, A. Bredikhin","doi":"10.5937/jaes0-42295","DOIUrl":"https://doi.org/10.5937/jaes0-42295","url":null,"abstract":"The article deals with the problem of using artificial intelligence (AI) in the construction sector, since these systems are not being actively implemented, though AI capabilities can significantly simplify the entire process of erecting buildings and structures, including the development of improved business plans, adjusting the progress of the project directly on the construction site, making suggestions for management decisions in case of deviations from schedules and logistics plans. The experience of Chinese and domestic construction organizations in this area has been studied. A scheme for the implementation of an artificial intelligence system in construction production has been developed, the necessary resources for the development of machine learning in this area have been analyzed. It is concluded that for correct decision-making it is necessary to apply the principles of discrete mathematics, in particular, the distribution of expert assessments accepted as linguistic variables on the Harrington desirability scale with the construction of the membership function.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77653343","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}
K. Abishev, K. Assylova, Asylbek Kassenov, A. Baltabekova
Practice shows that with insufficiently high traction qualities of traction vehicles deteriorate its operational properties. At present, extensive research is under way at home and abroad to find inexpensive but highly effective ways and techniques to improve the traction qualities of vehicles. The design of running systems with reduced resistance to movement and slipping will help to significantly increase the productivity of vehicles and reduce fuel consumption. This, in turn, will contribute to greater operational efficiency for traction vehicles. The authors of this study have developed the design of a traction vehicle with a half-tracked propulsor. The objective of the study is to develop a mathematical model for calculating the efficiency of operating a traction vehicle equipped with a half-tracked propulsior with rubber tracks. The proposed mathematical expression takes into account the deformability of the rubber tracks of the propulsor, the uneven distribution of normal pressure along the length of the track, slipping, geometric parameters of the propulsor and the physical and mechanical properties of the soil. Using numerical methods, calculations were carried out to determine the effect of the tangential tractive force on the slipping of a wheeled traction vehicle with a different layout of the running system. The dependences of the amount of slipping on the tangential thrust force are determined. It has been found that with an increase in the traction force, the slipping increases, however, the intensity of growth of a half-tracked propulsor compared to a wheeled propulsor is much lower.
{"title":"DETERMINATION OF THE VALUE OF TANGENTIAL FORCE FOR THE HALF-TRACK TRACTION VEHICLE WITH RUBBER TRACKS","authors":"K. Abishev, K. Assylova, Asylbek Kassenov, A. Baltabekova","doi":"10.5937/jaes0-39677","DOIUrl":"https://doi.org/10.5937/jaes0-39677","url":null,"abstract":"Practice shows that with insufficiently high traction qualities of traction vehicles deteriorate its operational properties. At present, extensive research is under way at home and abroad to find inexpensive but highly effective ways and techniques to improve the traction qualities of vehicles. The design of running systems with reduced resistance to movement and slipping will help to significantly increase the productivity of vehicles and reduce fuel consumption. This, in turn, will contribute to greater operational efficiency for traction vehicles. The authors of this study have developed the design of a traction vehicle with a half-tracked propulsor. The objective of the study is to develop a mathematical model for calculating the efficiency of operating a traction vehicle equipped with a half-tracked propulsior with rubber tracks. The proposed mathematical expression takes into account the deformability of the rubber tracks of the propulsor, the uneven distribution of normal pressure along the length of the track, slipping, geometric parameters of the propulsor and the physical and mechanical properties of the soil. Using numerical methods, calculations were carried out to determine the effect of the tangential tractive force on the slipping of a wheeled traction vehicle with a different layout of the running system. The dependences of the amount of slipping on the tangential thrust force are determined. It has been found that with an increase in the traction force, the slipping increases, however, the intensity of growth of a half-tracked propulsor compared to a wheeled propulsor is much lower.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80475517","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}
Public transportation is widely considered more attractive in developed countries compared to developing countries, primarily due to its level of service performance, and the influencing factors vary depending on the characteristics of the place and the community. Meanwhile, passenger loyalty is essential to increase the demand for public transportation. This research aims to investigate the impact of service performance and passenger satisfaction on passenger loyalty to public bus transportation in Banda Aceh, Indonesia. The research was conducted on six Trans Koetaradja Bus corridors that connect the city and its surrounding areas, and the data was analyzed using the multiple regression method with SPSS. The results showed that that service performance and passenger satisfaction had an impact on passenger loyalty, with a correlation coefficient of 0.563. However, the determination value (R2) was only 0.317, indicating that only 31.7% of the service performance and passenger satisfaction affected passenger loyalty to the Trans Koetaradja bus. The remaining 68.3% were influenced by other variables. Meanwhile, the low contribution of service performance and passenger satisfaction was likely due to the fact that Trans Koetaradja passengers have private vehicles, which are considered more efficient. This can be seen from the respondents' trip frequency of only 1-2 times a week. To address this issue, integrated and accessible public transportation and mixed-use urban planning are needed in Banda Aceh to improve travel duration. It is hoped that these results can improve the public interest and loyalty to public transportation in their daily activities.
{"title":"THE INFLUENCE OF SERVICE PERFORMANCE AND PASSENGER SATISFACTION ON PUBLIC TRANSPORT LOYALTY IN A SMALL CITY IN A DEVELOPING COUNTRY","authors":"F. Suryani, C. Mutiawati, R. Faisal","doi":"10.5937/jaes0-41716","DOIUrl":"https://doi.org/10.5937/jaes0-41716","url":null,"abstract":"Public transportation is widely considered more attractive in developed countries compared to developing countries, primarily due to its level of service performance, and the influencing factors vary depending on the characteristics of the place and the community. Meanwhile, passenger loyalty is essential to increase the demand for public transportation. This research aims to investigate the impact of service performance and passenger satisfaction on passenger loyalty to public bus transportation in Banda Aceh, Indonesia. The research was conducted on six Trans Koetaradja Bus corridors that connect the city and its surrounding areas, and the data was analyzed using the multiple regression method with SPSS. The results showed that that service performance and passenger satisfaction had an impact on passenger loyalty, with a correlation coefficient of 0.563. However, the determination value (R2) was only 0.317, indicating that only 31.7% of the service performance and passenger satisfaction affected passenger loyalty to the Trans Koetaradja bus. The remaining 68.3% were influenced by other variables. Meanwhile, the low contribution of service performance and passenger satisfaction was likely due to the fact that Trans Koetaradja passengers have private vehicles, which are considered more efficient. This can be seen from the respondents' trip frequency of only 1-2 times a week. To address this issue, integrated and accessible public transportation and mixed-use urban planning are needed in Banda Aceh to improve travel duration. It is hoped that these results can improve the public interest and loyalty to public transportation in their daily activities.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":"283 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80196082","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 examines the ability to introduce an industrial waste product, wood chips, in concrete as a partial replacement for fine aggregate. Water was used to treat the wood chips before mixing to prevent them from soaking up the cement hydration water. The research presented in this paper aims to determine the impact of different treatment methods. The first method uses cement paste, and the second is sodium silicate. Twelve trial mixtures were prepared and cast employing water-cement ratios of 0.44 at various replacement levels of wood chippings. Fresh concrete properties tested inclusive slump test. Hardened concrete properties tested inclusively flexural strength, splitting tensile strength, compressive strength, and unit weight. Test results show that the lightening of concrete by wood shavings decreases the strength properties and the unit weight. On the other hand, the value of the slump test increased depending on the level of replacement of wood shaving. The most acceptable mixture and less reduction in the strength properties have been shown at MC10. The results of the tests demonstrate that the disposal of wood chips in concrete is practical and appropriate.
{"title":"THE FEASIBILITY OF IMPROVING CONCRETE STRENGTH PROPERTIES BY ADDING WASTE WOOD CHIPS","authors":"A. Sharba, J. Al-kaabi, Salwa R. Al-Taai","doi":"10.5937/jaes0-40263","DOIUrl":"https://doi.org/10.5937/jaes0-40263","url":null,"abstract":"This paper examines the ability to introduce an industrial waste product, wood chips, in concrete as a partial replacement for fine aggregate. Water was used to treat the wood chips before mixing to prevent them from soaking up the cement hydration water. The research presented in this paper aims to determine the impact of different treatment methods. The first method uses cement paste, and the second is sodium silicate. Twelve trial mixtures were prepared and cast employing water-cement ratios of 0.44 at various replacement levels of wood chippings. Fresh concrete properties tested inclusive slump test. Hardened concrete properties tested inclusively flexural strength, splitting tensile strength, compressive strength, and unit weight. Test results show that the lightening of concrete by wood shavings decreases the strength properties and the unit weight. On the other hand, the value of the slump test increased depending on the level of replacement of wood shaving. The most acceptable mixture and less reduction in the strength properties have been shown at MC10. The results of the tests demonstrate that the disposal of wood chips in concrete is practical and appropriate.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":"128 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86446705","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}
Dineth Dhananjaya, Madushan Fernando, Mavin Silva, T. Sivakumar
Traffic-related analyses are essential to implementing traffic management approaches to create mobility more convenient. In this context, Passenger Car Unit (PCU) values as a uniform measure of vehicles are instrumental in analysis such as traffic capacity estimation, traffic flow model development, level of service determination, etc. These studies always demand a recently calculated set of PCU values since the traffic conditions in arterials often change. PCU values for expressway and three-lane (one-way) road types have not been calculated in the Sri Lankan context, and the available set of values has become somewhat outdated. Hence, this study used Chandra's method to assess the PCU values of ten vehicle categories for four different mid-block road sections in the Colombo district, Sri Lanka. The data relating to the two main variables of this method, categorical speed, and area of vehicles, were collected from field surveys. The results of four-lane arterials were aggregated and compared with the existing PCU values, intending to propose an updated set for general transportation studies in Sri Lanka.
{"title":"PASSENGER CAR UNITS FOR DIFFERENT MIDBLOCK SECTIONS IN SRI LANKA UNDER MIXED TRAFFIC CONDITION","authors":"Dineth Dhananjaya, Madushan Fernando, Mavin Silva, T. Sivakumar","doi":"10.5937/jaes0-36600","DOIUrl":"https://doi.org/10.5937/jaes0-36600","url":null,"abstract":"Traffic-related analyses are essential to implementing traffic management approaches to create mobility more convenient. In this context, Passenger Car Unit (PCU) values as a uniform measure of vehicles are instrumental in analysis such as traffic capacity estimation, traffic flow model development, level of service determination, etc. These studies always demand a recently calculated set of PCU values since the traffic conditions in arterials often change. PCU values for expressway and three-lane (one-way) road types have not been calculated in the Sri Lankan context, and the available set of values has become somewhat outdated. Hence, this study used Chandra's method to assess the PCU values of ten vehicle categories for four different mid-block road sections in the Colombo district, Sri Lanka. The data relating to the two main variables of this method, categorical speed, and area of vehicles, were collected from field surveys. The results of four-lane arterials were aggregated and compared with the existing PCU values, intending to propose an updated set for general transportation studies in Sri Lanka.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72708480","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}
One the enormous amount of waste polyethylene (PE) materials amassing in Iraq is posing an expensive landfill and disposal issue. The current study examines the potential for employing PE as a partial replacement for environmentally friendly pavement construction. Different amounts of PE were used to partially replace asphalt cement (3 %, 6 %, 9 %, and 12 % by weight). The PE-substituted asphalt (PESA) binders were subjected to the rheological and compatibility properties. Additionally, two asphalt concrete (AC) mixtures—one control and one PEAC—were created for the mechanical and durability experiments. Among the parameters assessed during the tests are the following: adhesion to a variety of substrates and substrate surfaces; elongation at room temperature (aging index); flexibility at elevated temperatures (cracking index); temperature susceptibility; compatibility; and the extensional viscosity of the PESA binder as well as the extensional viscosity of the PESA-mixture (PESAM). Furthermore, the mechanical and durability properties of AC and PEAC mixes were examined using the Marshall stability, Marshall quotient, static indirect tensile strength at 25 and 60°C, tensile strength ratio, and resilient modulus 25°C tests. Results show that PESA binder outperforms virgin asphalt binder in terms of cracking and temperature resistance. PEAC mixture exhibits higher stability, indirect tensile strength, moisture resistance and resilient modulus than AC mixture. According to standard and durability testing, replacing virgin binder with six percent PE can be recyclable and suitable for use as sustainable material for paving applications.
{"title":"SUSTAINABLE RECYCLING OF POLYETHYLENE WASTE THROUGH UTILIZATION IN ASPHALT PAVING APPLICATIONS","authors":"M. Jamil, O. A. Salih, A. Hameed, Al-Hadidy A.I.","doi":"10.5937/jaes0-39960","DOIUrl":"https://doi.org/10.5937/jaes0-39960","url":null,"abstract":"One the enormous amount of waste polyethylene (PE) materials amassing in Iraq is posing an expensive landfill and disposal issue. The current study examines the potential for employing PE as a partial replacement for environmentally friendly pavement construction. Different amounts of PE were used to partially replace asphalt cement (3 %, 6 %, 9 %, and 12 % by weight). The PE-substituted asphalt (PESA) binders were subjected to the rheological and compatibility properties. Additionally, two asphalt concrete (AC) mixtures—one control and one PEAC—were created for the mechanical and durability experiments. Among the parameters assessed during the tests are the following: adhesion to a variety of substrates and substrate surfaces; elongation at room temperature (aging index); flexibility at elevated temperatures (cracking index); temperature susceptibility; compatibility; and the extensional viscosity of the PESA binder as well as the extensional viscosity of the PESA-mixture (PESAM). Furthermore, the mechanical and durability properties of AC and PEAC mixes were examined using the Marshall stability, Marshall quotient, static indirect tensile strength at 25 and 60°C, tensile strength ratio, and resilient modulus 25°C tests. Results show that PESA binder outperforms virgin asphalt binder in terms of cracking and temperature resistance. PEAC mixture exhibits higher stability, indirect tensile strength, moisture resistance and resilient modulus than AC mixture. According to standard and durability testing, replacing virgin binder with six percent PE can be recyclable and suitable for use as sustainable material for paving applications.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73479717","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 use of clean, abundant, and sustainable energy sources, such as solar and wind energy, is a strategy to reduce the reliance on fossil fuels and the danger of exposure to potentially harmful pollutants. However, increases in renewable energy utilisation might burden a power infrastructure due to its intermittent and variable characteristics. The intermittency of such renewables can be supported by a gas turbine power plant, especially if the gas turbines are fuelled with fuel that does not produce carbon emission. Using thermodynamic modelling software, this paper explains the technology and evaluates the performance of an existing natural gas fuelled CCGT plant in North Sumatera, Indonesia, if the facility is cofired with hydrogen. Hydrogen has a greater reactivity in comparison to natural gas, and related technological issues with hydrogen include faster flame speed, a higher adiabatic flame temperature, shorter autoignition delay periods, a broader flammability range, and increased volumetric fuel flow rate. Thermodynamic modelling demonstrates that plant production increases with the addition of H2 to the cofiring mixture, but CO2 emissions decrease.
{"title":"PERFORMANCE AND EMISSION ANALYSIS OF HYDROGEN AND NATURAL GAS COFIRING IN COMBINED CYCLE GAS TURBINE POWER GENERATION","authors":"R. Sitanggang","doi":"10.5937/jaes0-41926","DOIUrl":"https://doi.org/10.5937/jaes0-41926","url":null,"abstract":"The use of clean, abundant, and sustainable energy sources, such as solar and wind energy, is a strategy to reduce the reliance on fossil fuels and the danger of exposure to potentially harmful pollutants. However, increases in renewable energy utilisation might burden a power infrastructure due to its intermittent and variable characteristics. The intermittency of such renewables can be supported by a gas turbine power plant, especially if the gas turbines are fuelled with fuel that does not produce carbon emission. Using thermodynamic modelling software, this paper explains the technology and evaluates the performance of an existing natural gas fuelled CCGT plant in North Sumatera, Indonesia, if the facility is cofired with hydrogen. Hydrogen has a greater reactivity in comparison to natural gas, and related technological issues with hydrogen include faster flame speed, a higher adiabatic flame temperature, shorter autoignition delay periods, a broader flammability range, and increased volumetric fuel flow rate. Thermodynamic modelling demonstrates that plant production increases with the addition of H2 to the cofiring mixture, but CO2 emissions decrease.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81201307","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}
D. B. Darmadi, F. Gapsari, Steamy Renergia Dirman, M. Talice
Selecting the right cutting tool material for the type of workpiece material plays a very important role in the machining process. The efficiency of the machining process is greatly influenced by this selection. The tables in the manuals or the manufacturer's instructions are commonly used documents for the selection of cutting tool materials. Within each of these document types, the cutting tool materials were described by different criteria. So, tool selection is considered as a multi-criteria decision-making activity. The values of the criteria for each type of cutting tool can be a number or a certain range. This study proposes a new method to rank and select cutting tools. First, a ranking of the solutions for each criterion will be performed. This ranking is based on the mean value of the criteria in each solution. Therefore, this method is called “Ranking the Solutions based on the Mean Value of Criteria - RSMVC”. The RSMVC method was proven to be a highly reliable method for ranking the cutting tool materials. These results were successfully verified when solving the problems in different cases of cutter material selection.
{"title":"OPTIMUM POWER FOR ER-70S-2 AND SS400 DISSIMILAR CDW JOINT","authors":"D. B. Darmadi, F. Gapsari, Steamy Renergia Dirman, M. Talice","doi":"10.5937/jaes0-39068","DOIUrl":"https://doi.org/10.5937/jaes0-39068","url":null,"abstract":"Selecting the right cutting tool material for the type of workpiece material plays a very important role in the machining process. The efficiency of the machining process is greatly influenced by this selection. The tables in the manuals or the manufacturer's instructions are commonly used documents for the selection of cutting tool materials. Within each of these document types, the cutting tool materials were described by different criteria. So, tool selection is considered as a multi-criteria decision-making activity. The values of the criteria for each type of cutting tool can be a number or a certain range. This study proposes a new method to rank and select cutting tools. First, a ranking of the solutions for each criterion will be performed. This ranking is based on the mean value of the criteria in each solution. Therefore, this method is called “Ranking the Solutions based on the Mean Value of Criteria - RSMVC”. The RSMVC method was proven to be a highly reliable method for ranking the cutting tool materials. These results were successfully verified when solving the problems in different cases of cutter material selection.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89877539","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}
Speed is the main factor that is always considered when designing a ship. Also, a ship designer will try to make a good design regarding the ship's fuel efficiency and seakeeping performance. One example is the operation of passenger ships on the Ketapang – Gilimanuk crossing route in Bali, Indonesia. The Bali strait area has uncertainty waves and ocean currents; the determination of environmental characteristics is needed for an investigation. In this paper, a review is carried out on the primary parameters of ship hydrodynamics performance, i.e., hull changes to reduce ship resistance by modifying the bilge radius from angles of 10º, 15º, and 20º. This modification affects the geometric parameters. Two indicators are used to measure the effect of changes: resistance and seakeeping performance. Numerical methods were used to obtain the results, the calculation of the resistance was approached by the Holtrop process of investigation, and the NORDFORSK criteria validated the feasibility seakeeping assessment. The results of model Z show that when the deadrise angle is large, the ship reduces the resistance by approximately 8.2% at a service speed of 12 knots. Therefore, modification of the hull by raising the radius of the bilge results in a reduction in resistance, which affects the ship's rolling, but with an increase in speed, it can reduce the heave and pitch significantly with the resulting hull with good performance obtained.
{"title":"SHIP PERFORMANCE INVESTIGATION DUE TO DEADRISE MODIFICATION: A CASE STUDY PASSENGER SHIP","authors":"Betty Ariani, R. C. Ariesta","doi":"10.5937/jaes0-41234","DOIUrl":"https://doi.org/10.5937/jaes0-41234","url":null,"abstract":"Speed is the main factor that is always considered when designing a ship. Also, a ship designer will try to make a good design regarding the ship's fuel efficiency and seakeeping performance. One example is the operation of passenger ships on the Ketapang – Gilimanuk crossing route in Bali, Indonesia. The Bali strait area has uncertainty waves and ocean currents; the determination of environmental characteristics is needed for an investigation. In this paper, a review is carried out on the primary parameters of ship hydrodynamics performance, i.e., hull changes to reduce ship resistance by modifying the bilge radius from angles of 10º, 15º, and 20º. This modification affects the geometric parameters. Two indicators are used to measure the effect of changes: resistance and seakeeping performance. Numerical methods were used to obtain the results, the calculation of the resistance was approached by the Holtrop process of investigation, and the NORDFORSK criteria validated the feasibility seakeeping assessment. The results of model Z show that when the deadrise angle is large, the ship reduces the resistance by approximately 8.2% at a service speed of 12 knots. Therefore, modification of the hull by raising the radius of the bilge results in a reduction in resistance, which affects the ship's rolling, but with an increase in speed, it can reduce the heave and pitch significantly with the resulting hull with good performance obtained.","PeriodicalId":35468,"journal":{"name":"Journal of Applied Engineering Science","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89848626","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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