International journal of automotive science and technology最新文献

Experimental Investigation of Flow Drilling and Flow Tapping of Thin-Walled Square and Circular Hollow Sections 薄壁方形和圆形中空截面的流钻和流攻实验研究

International journal of automotive science and technology Pub Date : 2024-05-06 DOI: 10.30939/ijastech..1453441

M. Tunalioglu, Mehmet Keser

{"title":"Experimental Investigation of Flow Drilling and Flow Tapping of Thin-Walled Square and Circular Hollow Sections","authors":"M. Tunalioglu, Mehmet Keser","doi":"10.30939/ijastech..1453441","DOIUrl":"https://doi.org/10.30939/ijastech..1453441","url":null,"abstract":"One of the most important problems of automotive engineering is joining metal sheets, thin-walled tubes or profiles simply, efficiently, and economically. After conventional drilling and tapping in thin-walled materials, the strength remains low due to the small number of teeth and the connection can be easily unfastened. For increasing the strength there are several solutions such as using welded nuts, tapped rivets and welding extra nuts. Since nut welding cannot be done on the inner surfaces, these solutions are inadequate for square and circular tubes. In this study, holes of various diameters were drilled on 1.5 mm thick AISI 304 stainless steel and EN AW-6060 square and circular profiles by flow drilling at various rotational speeds, and then flow tapping was applied to the holes. The same processes were repeated with conventional drilling method to compare bushing heights and clamping strengths of the parts as well as the hardness values and capillary crack formations around the holes. According to the results obtained, the strength in flow drilling and tapping increases by 50-55% compared to the classical drilling method. The reason for this is that as the hole diameter increases, the amount of material plastered and the number of threads required for screwing increases approximately 2.5-3 times. Capillary cracks, which are observed in holes drilled with the traditional method as the hole diameter increases, are not observed with this method and thus increasing the strength of the connection.","PeriodicalId":474498,"journal":{"name":"International journal of automotive science and technology","volume":"102 11‐12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141007072","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}

引用次数: 0

Study of Proton-Exchange Membrane Fuel Cell Degradation and its Counter Strategies: Flooding/drying, Cold Start and Carbon Monoxide Poisoning 质子交换膜燃料电池降解及其应对策略研究：淹没/干燥、冷启动和一氧化碳中毒

International journal of automotive science and technology Pub Date : 2024-02-20 DOI: 10.30939/ijastech..1389241

Fatima Haidar, Divyesh Arora, Adrien Soloy, T. Bartoli

引用次数: 0

Trajectory Tracking Control Using Evolutionary Approaches for Autonomous Driving 利用进化方法进行自动驾驶的轨迹跟踪控制

International journal of automotive science and technology Pub Date : 2024-02-12 DOI: 10.30939/ijastech..1354082

Yiğit Çağatay Kuyu

引用次数: 0

0/1 and 3- dimensional cold flow analysis of a diesel engine: A case study 柴油发动机的 0/1 和 3 维冷流分析：案例研究

International journal of automotive science and technology Pub Date : 2024-02-09 DOI: 10.30939/ijastech..1384376

Gonca Kethudaoglu, Fatih Aktaş, Salih Karaaslan, Nureddin Di̇nler

{"title":"0/1 and 3- dimensional cold flow analysis of a diesel engine: A case study","authors":"Gonca Kethudaoglu, Fatih Aktaş, Salih Karaaslan, Nureddin Di̇nler","doi":"10.30939/ijastech..1384376","DOIUrl":"https://doi.org/10.30939/ijastech..1384376","url":null,"abstract":"Gas motion in the engine cylinder plays a critical role in the air-fuel mixing and combustion processes in diesel engines. Moreover, it influences the engine's performance and emissions, as well as its heat transfer. The intake air motion regulates the main phases of the flow in the cylinder, which is characterized by swirl, squish, and turbulence. Inducing swirl and tumble in the intake process provides high turbulence levels at ignition, resulting in more effective flame speeds and better combustion for lean air-fuel ratios or with EGR. This high turbulence also allows the flame front to reach the end gas before the chemical reactions start, leading to auto-ignition for usual air-fuel ratios. Additionally, it enables higher compression ratios without engine knocking. Computational fluid dynamics (CFD) software is used to enhance in-cylinder flow characteristics, and in this study, cold flow simulation of a naturally aspirated, direct injection diesel engine was conducted using AVL Fire M. Swirl, tumble, and TKE parameters were investigated to make a detailed analysis of the in-cylinder flow for the relevant engine.","PeriodicalId":474498,"journal":{"name":"International journal of automotive science and technology","volume":"212 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140459638","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}

引用次数: 0

Comparison of Surface Hardening Processes Applied to AISI 5140 Steel withSide Load Test 通过侧载测试比较 AISI 5140 钢的表面硬化工艺

International journal of automotive science and technology Pub Date : 2024-01-28 DOI: 10.30939/ijastech..1370591

Talha İkbal Çiğir, Ahmet Asım Eser, Furkan Göğer, Mustafa Acarer

{"title":"Comparison of Surface Hardening Processes Applied to AISI 5140 Steel withSide Load Test","authors":"Talha İkbal Çiğir, Ahmet Asım Eser, Furkan Göğer, Mustafa Acarer","doi":"10.30939/ijastech..1370591","DOIUrl":"https://doi.org/10.30939/ijastech..1370591","url":null,"abstract":"While the vehicle suspension system parts perform the functions expected from them, the surfaces of the parts areexposed to higher stress and higher abrasive forces compared to theinterior parts. Materials have surface strengthlimits. When the stress and abrasive forces to which the parts are exposed exceed the surface strength limit, cracksoccur on the part surfaces. As the stress and forces on the part increase, the part is damaged by breaking. \u0000AISI 5140 Reclamation steel is generally preferred for the joints in the vehicles. This steel is a material with hightoughness. Its usage areas are very wide. Parts such as automobile and engine parts, axle sleeve, front axle,steeringshaft, crankshaft, bolts, nuts and joints can be given as examples of usage areas. It is also a suitable material for surfacehardening processes. The purpose of the surface hardening process is to increase the wear resistance of the surfacesexposed to wear, as well as to increase the fatigue life of the part and increase the corrosion resistance. Since the innerparts of the parts are not affected by surface hardening, the resistance against impacts is increased and thus crackformation on the surface is delayed. Fatigue life is extended by delaying crack formation on the surface. In this study,the comparison of a part with induction surface hardening, which is one of the methods in which the chemical com-position of the surface is not changed, apart with nitration, which is one of the methods in which the chemical com-position of the surface is changed, and a part without any surface hardening, with the side load test, which is a statictest method. subject taken.The results from the tests applied to the samples were interpreted.According to the resultsobtained, the sample with the highest durability rate is the sample that has been surface hardened by induction.","PeriodicalId":474498,"journal":{"name":"International journal of automotive science and technology","volume":"113 1-2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140491622","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}

引用次数: 0

Examination of Mechanical Tests of CFRP Composite Material with Different Orientation Angles Used in the Automotive Industry 汽车行业使用的不同定向角 CFRP 复合材料的力学测试研究

International journal of automotive science and technology Pub Date : 2024-01-25 DOI: 10.30939/ijastech..1399886

Ercan Şimşir, H. Bayrakçeken

{"title":"Examination of Mechanical Tests of CFRP Composite Material with Different Orientation Angles Used in the Automotive Industry","authors":"Ercan Şimşir, H. Bayrakçeken","doi":"10.30939/ijastech..1399886","DOIUrl":"https://doi.org/10.30939/ijastech..1399886","url":null,"abstract":"Carbon fiber reinforced polymer (CFRP) composites, which have good mechanical properties, are widely used in many sectors today. Carbon fabrics/epoxy composites are materials used in the production of various components in many professional in-dustries such as aerospace, construction, textile and automotive. The use of CFRP composite lightweight materials has begun to increase in the automotive industry to reduce emissions, increase crash resistance and save fuel. In order to evaluate mate-rials in these industrial areas, it becomes important to know their mechanical proper-ties such as tensile strength and three-point bending. In this study, carbon fiber rein-forced polymer (CFRP) [0°/0°], [0°/90°], [±45°] and [0°/90°/+45°/-45°/-45°/+45°/90°/0°] four different types of orientation CFR materials were used.Tensile and three-point bending tests were performed on the samples produced with 4 differ-ent orientation angles. Three-point bending tests were carried out in accordance with ASTM D7264 standards and tensile tests were carried out in accordance with ASTM D 3039 standards. Stress-strain and force-strain curves were drawn. It has been ob-served that the material type that withstands the maximum force the most is the C48 structured CFRP material with an 8-layer [0°/90°/+45°/-45°]s arrangement. However, it was concluded that the carrying capacity of the C48 sample was higher than the samples with different fabric orientation.","PeriodicalId":474498,"journal":{"name":"International journal of automotive science and technology","volume":"71 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140496611","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}

引用次数: 0

Investigation of the wear and friction profile of TPU-based polymers at different infill ratios 不同填充率下热塑性聚氨酯基聚合物的磨损和摩擦曲线研究

International journal of automotive science and technology Pub Date : 2024-01-23 DOI: 10.30939/ijastech..1398109

Enes Aslan, G. Akıncıoğlu

{"title":"Investigation of the wear and friction profile of TPU-based polymers at different infill ratios","authors":"Enes Aslan, G. Akıncıoğlu","doi":"10.30939/ijastech..1398109","DOIUrl":"https://doi.org/10.30939/ijastech..1398109","url":null,"abstract":"Additive manufacturing is a widely used method in industry and research areas. In particular, fused deposition modelling is the most prevalent technique used by many professional and nonprofessional users. Many polymers can be used with this system, including thermo polyurethanes (TPU). TPUs have excellent elastic properties and high endurance against corrosion, humidity, and oil, and they ex-hibit a great absorbance capability to noise and vibrations, biocompatibility, and chemical resistance. Thermoplastic polyurethane (TPU) is also preferred for use in 3D/4D printing applications due to its easy casting, injection, and extrusion capabilities and its shape memory features. In this study, flexible TPU and carbon-mixed TPU were used to produce specimens with fused deposition modelling tech-niques at different infill ratios with the same patterns. The effects of the infill ratio within the different and same materials were investigated in terms of wear and friction profiles. Additionally, thermal and worn surface images were taken using a digital microscope. The hardness and diameter value altera-tions were also investigated for different materials and infill ratios. As a result of the study, material al-teration is more effective than the infill ratios in all parameters.","PeriodicalId":474498,"journal":{"name":"International journal of automotive science and technology","volume":"25 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140498890","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}

引用次数: 0

A bibliometric overview of research on auxetic structures: Trends and patterns 辅助结构研究文献计量概览：趋势与模式

International journal of automotive science and technology Pub Date : 2024-01-17 DOI: 10.30939/ijastech..1374313

Erhan Cetin, S. S. Seyitoglu

{"title":"A bibliometric overview of research on auxetic structures: Trends and patterns","authors":"Erhan Cetin, S. S. Seyitoglu","doi":"10.30939/ijastech..1374313","DOIUrl":"https://doi.org/10.30939/ijastech..1374313","url":null,"abstract":"Auxetic structures have very interesting features compared to traditional structures and can also be used in the automotive industry thanks to their lightness and strength have attracted the attention of researchers in recent decades. The current study summarizes the contributions made by researchers from all over the world between 2002 and 2022 in the field of auxetic structures. Using the Scopus database, a bibliometric analysis was used to examine the scientific studies in the area. The analysis covered different characteristics of publications, including publication type, main study fields, journals, citations, authorship patterns, affiliations, and keywords. The bibliometric indicators showed that there were 2599 publications published by 5161 authors in 85 countries from 2002 to 2022. The results also showed that the publications produced came primarily from China, the United States, and the United Kingdom, and the publications produced from these countries accounted for 42.99% of all publications. In particular, the most productive author, country, institution, and journal are Grima JN, China, Ministry of Education China, and Composite Structures, respectively. This study has great value since it demonstrates how to research topics change from year to year and can predict future development trends.","PeriodicalId":474498,"journal":{"name":"International journal of automotive science and technology","volume":"116 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140505223","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}

引用次数: 0

Investigation of Different Communication Topologies for Cooperative Adaptive Cruise Control Systems 合作式自适应巡航控制系统的不同通信拓扑结构研究

International journal of automotive science and technology Pub Date : 2024-01-13 DOI: 10.30939/ijastech..1368820

Beyhannur Gülden, M. T. Emirler

{"title":"Investigation of Different Communication Topologies for Cooperative Adaptive Cruise Control Systems","authors":"Beyhannur Gülden, M. T. Emirler","doi":"10.30939/ijastech..1368820","DOIUrl":"https://doi.org/10.30939/ijastech..1368820","url":null,"abstract":"After Adaptive Cruise Control (ACC) system applications, Cooperative Adaptive Cruise Control (CACC) systems are becoming an important part of automotive technology and industry in autonomous vehicles convoy applications. Together with this developing technology, CACC systems use vehicle to vehicle (V2V) communication to automatically transmit the movement information of vehicles. In this context, ACC systems use Radar or LIDAR measurements while CACC systems also consider the acceleration of the preceding vehicle. In this paper, the forms of information transmission between vehicles in autonomous vehicle convoys using CACC systems have been examined. From these forms of information transmission, the leader following, the predecessor follow-ing and the leader – predecessor following topologies have been considered. For each topology, an autonomous vehicle convoy consisting of eight vehicles was modeled in the MATLAB/Simulink environment. The feedforward and the feedback control system structure were given for CACC and ACC systems. For different communication topologies, the position-time, the speed-time, the acceleration-time and the headway time-time results were obtained. The maximum intervehicle distance error plots for each vehicle in different topology convoys were given to analyze the dynamic behavior of the convoys. The results have been analyzed in terms of the maximum intervehicle distance, the maximum speed, the minimum and the maximum acceleration, and the maximum headway time deviation from the desired headway time.","PeriodicalId":474498,"journal":{"name":"International journal of automotive science and technology","volume":"31 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140508944","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}

引用次数: 0

Sustainable urban transportation performance in Ankara: A comparative study 安卡拉的可持续城市交通绩效：比较研究

International journal of automotive science and technology Pub Date : 2024-01-09 DOI: 10.30939/ijastech..1369878

Ebru ARIKAN ÖZTÜRK

{"title":"Sustainable urban transportation performance in Ankara: A comparative study","authors":"Ebru ARIKAN ÖZTÜRK","doi":"10.30939/ijastech..1369878","DOIUrl":"https://doi.org/10.30939/ijastech..1369878","url":null,"abstract":"Urban mobility is increasing rapidly due to the increasing population, number of motor vehicles and economic developments in Türkiye. Private vehicles are given priority in ur-ban transportation policies and practices in metropolitan municipalities. Therefore, prob-lems such as traffic congestion, delays, air pollution, noise, improper land use, traffic ac-cidents and decrease quality of life are experienced. Although sustainable transportation is generally referred to with air pollution, global warming and climate change; It refers to a wide transportation structure that is sustainable in terms of economic, social and envi-ronmental effects. In this study, Ankara's sustainable urban transportation performance was compared with İstanbul, İzmir, Konya and Antalya, using the Sustainable Urban Transportation Index (SURKENT), which was previously developed by the author. In SURKENT, 15 sub-indicators are defined under 4 main indicators. The main indicators are Environmental Performance (EP), Transportation Performance (TP), Energy Perfor-mance (EnP) and Municipality Governance Performance (MGP). 4 sub-indicators were used under Environmental Performance, 7 under Transportation Performance, 2 under Energy Performance and 2 sub-indicators under Municipality Governance Performance. Minimum-maximum normalization was used for sub-indicators containing quantitative data, and 0-100 scoring was used for qualitative data. The ranking of cities with the high-est sustainable urban transportation performance was found as follows: İstanbul, İzmir, Konya, Ankara, Antalya. Ankara; it is 3rd in EP, 3rd in TP, 5th in EnP and 2nd in MGP.","PeriodicalId":474498,"journal":{"name":"International journal of automotive science and technology","volume":"57 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139535154","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}

引用次数: 0