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Articles 1861 - 1890 of 16386
Full-Text Articles in Materials Science and Engineering
Properties And Mechanism Of Reclaimed Asphalt Based On Sbs Structure Repair, Feng Xinjun, Yang Hongyang, Xiao Honghai, Zhu Ziqiang
Properties And Mechanism Of Reclaimed Asphalt Based On Sbs Structure Repair, Feng Xinjun, Yang Hongyang, Xiao Honghai, Zhu Ziqiang
Journal of China & Foreign Highway
At present，the common asphalt regenerant is used for treating the aged styrene-butadiene-styrene （SBS） modified asphalt in China，which fails to repair the SBS cross-networking structure，resulting in the poor regeneration effect of the aged SBS modified asphalt.In this study，a new reactive regenerator containing a structural repair agent，extractive oil，plasticizer，solubilizer，and a small amount of SBS was used to regenerate the aged SBS modified asphalt.The conventional properties and rheological properties of reclaimed SBS modified asphalt were studied by three index tests，Brookfield viscosity test，dynamic shear rheological test，and low temperature bending rheological test.Then，a fluorescence microscope and infrared spectrometer were used to study the regeneration mechanism of the …
Research On General Drawing Design Technologies For Cover Culverts In Hunan Province, Peng Xiaoming, Li Yukun, Hu Qiong, Xia Yutao
Research On General Drawing Design Technologies For Cover Culverts In Hunan Province, Peng Xiaoming, Li Yukun, Hu Qiong, Xia Yutao
Journal of China & Foreign Highway
As one of the main structures of highways，a culvert has the characteristics of large quantity and wide range.Affected by design and construction factors，engineering diseases of culverts have been prominent for a long time.With the extensive promotion of the green highway construction concept and the continuous updating of technical standards and design specifications，the original general drawing of culverts fails to meet the needs of the sustainable and healthy development of highway construction under the new situation.Hunan Provincial Communications Planning，Survey & Design Institute has conducted extensive and in-depth investigation and research on the key technologies of highway culvert design and prepared a …
Transverse Deformation And Countermeasures Of Cantilever Assembly Of Super‑Wide Steel Box Girder Of Zhongshan Bridge Over Shenzhen‑Zhongshan Link, Zhou Yu
Journal of China & Foreign Highway
In view of the transverse deformation of super-wide steel box girders of cable-stayed bridges during the cantilever assembly，the construction characteristics of the two-way eight-lane super-wide steel box girder of Zhongshan Bridge over Shenzhen-Zhongshan Link were analyzed，and the main causes of the transverse deformation during the cantilever assembly of the super-wide steel box girder were investigated.According to the matching height difference adjustment technology in the cantilever assembly construction of the wide box girder in China and abroad，this paper innovatively proposed a matching process of straight beam locking + initial tension of hanging cables，which better solved the problem of poor transverse deformation …
Fume Emission And Environmental Impact Assessment In Fresh Asphalt Tunnel Construction Site, Deng Wenti, Zou Guilian, Zhang Yuan, Yu Liang, Xie Huiduan
Fume Emission And Environmental Impact Assessment In Fresh Asphalt Tunnel Construction Site, Deng Wenti, Zou Guilian, Zhang Yuan, Yu Liang, Xie Huiduan
Journal of China & Foreign Highway
In view of the random monitori ng of fum e emission in asphalt pavement construction sites，combined with the engineering application of fresh asphalt in the construction of hot-mixed and hot-spread asphalt pavement in large and long tunnels for fume emission reduction，the fume collection and evaluation method of asphalt pavement construction sites were studied，and the emission reduction effect of fresh asphalt was evaluated.The Summa tanks were used to collect the asphalt fume at different positions of the paver，and the asphalt fume was quantitatively analyzed by gas chromatograph-mass spectrometer （GC-MS）.The results show that compared with the non-fresh asphalt from the same source，the …
Stability Analysis Of High And Steep Bank Slope Of Jinqi Bridge On Wudang‑Changshun Expressway, Wang Hao
Stability Analysis Of High And Steep Bank Slope Of Jinqi Bridge On Wudang‑Changshun Expressway, Wang Hao
Journal of China & Foreign Highway
Jinqi Bridge on the Wudang-Changshun Expressway in Guizhou Province crosses the Maotiao River，and the poor geological conditions such as dangerous rock mass and collapse accumulation body on the bank slope of the river are relatively developed，which seriously affects the site selection and safety of the bridge.In order to study the stability of the high and steep bank slope of the bridge，the paper explored the main poor geological conditions in the bridge site through a comprehensive air-ground investigation.By means of numerical analysis，InSAR，and other technologies，the movement range of dangerous rock mass on the bank slope was quantitatively evaluated.The stability and deformation mode …
Shear Creep Characteristics And Slope Deformation Mechanism Of Siliceous Slate, Li Jian, Yan Liangyu, Yu Kaibing, Li Ming, Yan Tingzhou, Zhao Jia
Shear Creep Characteristics And Slope Deformation Mechanism Of Siliceous Slate, Li Jian, Yan Liangyu, Yu Kaibing, Li Ming, Yan Tingzhou, Zhao Jia
Journal of China & Foreign Highway
To study the time-dependent creep effect of siliceous slate and the deformation and failure evolution law of high slope，in this paper，the shear creep test of indoor rock mass was carried out to plot the shear creep duration curves of siliceous slate under different normal stresses，the shear displacement-time curve，and the creep rate-time curve under different normal loads and shear loads.The average creep rate and shear load variation of siliceous slate were studied，and the long-term shear strength parameters of siliceous slate were determined by the steady-state creep rate method.The results show that in the creep test，the sensitivity of cohesion is significantly greater …
Rotating Wheel Tracking Tester And Torsional Resistance Of Asphalt Mixtures, Yao Hongru, Wang Qiang, Lu Guangyan, Zhou Xiaolong
Rotating Wheel Tracking Tester And Torsional Resistance Of Asphalt Mixtures, Yao Hongru, Wang Qiang, Lu Guangyan, Zhou Xiaolong
Journal of China & Foreign Highway
Asphalt pavement is prone to pla stic deformation and aggregate raveling when it is in torsion.At present，there is no standard test method and equipment to evaluate the torsional resistance of asphalt mixtures.In order to study the effective evaluation method for the torsional shear resistance of asphalt mixtures，this paper introduced the structures and working principles of three kinds of equipment developed in Japan.The torsional resistance of five typical asphalt mixtures was evaluated by rotating wheel tracking tests，and factors affecting the torsional resistance of asphalt mixtures were analyzed.The results show that the types of structures and binders of asphalt mixtures have an …
Construction Of Carbon Emission Monitoring And Management System For Commercial Vehicles, Chang Zheng, Song Yan, Ji Meichen, Liu Yuqing, Wang Jing
Construction Of Carbon Emission Monitoring And Management System For Commercial Vehicles, Chang Zheng, Song Yan, Ji Meichen, Liu Yuqing, Wang Jing
Journal of China & Foreign Highway
To construct a comprehensive carbon emission monitoring and management system for commercial vehicles，firstly，this article described the background and significance of carbon emission monitoring and management of commercial vehicles and summarized the research in relevant fields in China and abroad.Then，this article expounded on the carbon emission monitoring system for commercial vehicles，which covered three major levels：monitoring target layer，monitoring implementation layer，and monitoring summary layer，so as to achieve comprehensive and accurate carbon emission monitoring.Finally，combined with the carbon emission monitoring data of commercial vehicles，this article put forward a carbon emission management system for commercial vehicles based on data information，including carbon emission data sharing and opening，data …
Experimental Study On Reinforced Geogrid Of Construction And Demolition Wastes Based On Dic Technology, Tan Peng, Li Hai, Li Xiangping, Gu Fan, Zhang Junhui
Experimental Study On Reinforced Geogrid Of Construction And Demolition Wastes Based On Dic Technology, Tan Peng, Li Hai, Li Xiangping, Gu Fan, Zhang Junhui
Journal of China & Foreign Highway
In order to control differential settlement caused by new and old subgrade connections after expressway reconstruction and expansion，this paper proposed a layered treatment structure for the loose steps of the old road with high water content.A layer of construction and demolition waste was laid on the step surface of the old road to wrap the geogrid.The treatment effect was compared with that of sand wrapping and lime mixing，and the digital speckle correlation （DIC） was used to observe the reinforced influence zone，so as to determine the thickness of different layers of the subgrade wrapped by construction and demolition wastes.The particle rotation …
Working Performance Of Rigid Airfield Runway Considering Influence Of Cavity Depth, Dai Xuan, Li Zhao, Cai Jing, Li Yue, Liu Guoguang, Qi Lin
Working Performance Of Rigid Airfield Runway Considering Influence Of Cavity Depth, Dai Xuan, Li Zhao, Cai Jing, Li Yue, Liu Guoguang, Qi Lin
Journal of China & Foreign Highway
In order to analyze the influence of cavity depth on runway safety，a numerical simulation was carried out using the finite difference method.A total of 208 sets of different working conditions were designed by taking into account factors such as different aircraft types，runway dimensions，and cavity depth and area.Based on the runway life model considering the exponential decay of the structural condition，an analytical method was proposed to evaluate the impact of the cavity on the runway life.The results show that the bending and stress of the runway increase gradually with the increase in the cavity depth，but the growth rate is getting slower …
Intelligent Compaction Of Asphalt Pavement And Its Key Influencing Factors, Zhu Huifang, Wang Liang
Intelligent Compaction Of Asphalt Pavement And Its Key Influencing Factors, Zhu Huifang, Wang Liang
Journal of China & Foreign Highway
Intelligent compaction，as a new type of road construction quality monitoring and management technology，has been widely used in the compaction process of asphalt pavement.However，due to the lack of understanding of the compaction process and the interaction mechanism between asphalt mixture particles，the problems of over-compaction and non-uniformity of compaction often occur in the actual construction，which seriously affects the quality of road construction and service performance.In this study，through the combination of the engineering field and indoor tests，the variation characteristics of asphalt mixture compaction with the number of compaction were analyzed by using the semi-variance function of the geostatistical model，and the effect of temperature …
Influence Of Lateral Constraint Conditions And Compactness On Compression Characteristics Of Compacted Loess In Northern Shaanxi, Chang Yinghong, Zhao Jinpeng, Zhang Xiaozhou, Yang Hao, Li Zhe, Shao Dengfeng, Liu Lulu
Influence Of Lateral Constraint Conditions And Compactness On Compression Characteristics Of Compacted Loess In Northern Shaanxi, Chang Yinghong, Zhao Jinpeng, Zhang Xiaozhou, Yang Hao, Li Zhe, Shao Dengfeng, Liu Lulu
Journal of China & Foreign Highway
In recent years，with the rapid development of road engineering construction，subgrade settlement caused by vertical compression of compacted loess has become increasingly serious.The previous research on the deformation of compacted loess mostly focuses on moisture content，porosity，saturation，and other aspects，ignoring the influence of lateral constraint conditions and different compaction on compacted loess.To address these issues，based on the reconstruction and expansion project of G 307 road in northern Shaanxi，this paper selected compacted soil samples of subgrade on site to carry out indoor compression tests.By applying different lateral constraint conditions，the stress-strain curves of compacted loess subjected to vertical multistage load under different compactness and confining …
Performance Of Composite Modified Permeable Concrete With Nano‑Silicon And Polypropylene Fiber, Liu Benli, Zhang Peng, Shan Jingsong, Zhao Haijian, Su Benjun, Li Chao
Performance Of Composite Modified Permeable Concrete With Nano‑Silicon And Polypropylene Fiber, Liu Benli, Zhang Peng, Shan Jingsong, Zhao Haijian, Su Benjun, Li Chao
Journal of China & Foreign Highway
In order to improve the comprehensive performance of permeable concrete，nano-silicon and polypropylene fiber were added to permeable concrete to study the performance of the composite modified permeable concrete.Firstly，the influence of single-doped nano-silicon on the performance of cement paste and permeable concrete was studied，and the content of nano-silicon and the optimal water-to-binder ratio were determined.On this basis，different proportions of polypropylene fiber were mixed，and the reasonable content of polypropylene fiber was determined.The results show that nano-silicon improves the porosity of permeable concrete and increases the optimal water-to-binder ratio.When the content of nano-silicon is 0.5%，and the water-to-binder ratio is 0.32，the compressive strength of …
Oxygen Diffusion Behavior In Asphalt Film Based On Molecular Dynamics Simulation, Zhang Yu, Li Zheng, Fang Long, Han Bo, Wang Weicheng, Mao Zigen, Liu Qi, Yu Bin
Oxygen Diffusion Behavior In Asphalt Film Based On Molecular Dynamics Simulation, Zhang Yu, Li Zheng, Fang Long, Han Bo, Wang Weicheng, Mao Zigen, Liu Qi, Yu Bin
Journal of China & Foreign Highway
Asphalt aging is one of the most important concerns during the use of asphalt pavement.However，asphalt usually exists in the form of a film in the mixture.Oxygen diffusion is an important factor affecting asphalt aging.To investigate the oxygen diffusion behavior in asphalt film under different working conditions，an oxygen-asphalt-aggregate （OAA） model was developed in this study to simulate the state of the asphalt film on the aggregate surface under real conditions.Oxygen diffusion and asphalt component migration in the OAA model were investigated under different conditions of time，temperature，oxygen concentration，and aggregate type.The influence of each factor on the molecular behavior of the model was …
Force Analysis Of Open Web Triangular Area Of Ganxi Super Bridge During Construction, Sun Keqiang, Li Baifu, Xue Qilin
Force Analysis Of Open Web Triangular Area Of Ganxi Super Bridge During Construction, Sun Keqiang, Li Baifu, Xue Qilin
Journal of China & Foreign Highway
Ganxi Super Bridge is an open web continuous rigid frame bridge with a main span of 300 m，and the upper chord box girder in the open web triangular area adopts the post support of a few telescopic columns with the hanging basket for suspension casting.The lower chord box girder adopts the full cable-stayed buckle method with a hanging basket for suspension casting.To analyze the force characteristics of the temporary structural system in the triangular area during the construction process using this method，the force variation law during the construction process of the temporary structural system in the triangular area was summarized …
Value Of Effective Length Coefficient Of Pier Of Long‑Span Continuous Rigid Frame Bridge, Tang Like, Song Suidi, Zhang Yang
Value Of Effective Length Coefficient Of Pier Of Long‑Span Continuous Rigid Frame Bridge, Tang Like, Song Suidi, Zhang Yang
Journal of China & Foreign Highway
The effective length coefficient of a pier is a controlling factor affecting the safety and economic index of bridge structures.The values of the effective length coefficient of compression members in Chinese and foreign codes are basically similar，and they are only applicable to ideal boundary conditions.In practical application，it is necessary to make appropriate adjustments according to the specific structural form.In order to get the value closer to the actual situation of the structure，this paper analyzed the overall stability of the structure and investigated the influence laws of different factors on the effective length coefficient of the continuous rigid frame bridge in …
Calculation Of Slag Weight In Shield Construction Based On Compound Continuous Belt Conveyor, Zhou Biao, Ding Xiaobin, Sun Wenjian, Ren Xufeng
Calculation Of Slag Weight In Shield Construction Based On Compound Continuous Belt Conveyor, Zhou Biao, Ding Xiaobin, Sun Wenjian, Ren Xufeng
Journal of China & Foreign Highway
Based on the construction data of continuous belt conveyors in shield construction，this paper evaluates two common calculation methods of slag weight （slag weight calculation based on loosening coefficient and slag weight calculation based on external additives ） to accurately manage slag in shield construction.According to the law of slag discharged from each ring in shield construction，an improved slag weight estimation method in shield construction was proposed.The results show that there is a big error in the slag weight calculation based on the loosening coefficient.When slag weight calculation based on external additives is used，the calculated value is always smaller than the …
Comparative Study On Dynamic Effect Of Basic Longitudinal Section Alignment, Du Yongping, Wang Peng
Comparative Study On Dynamic Effect Of Basic Longitudinal Section Alignment, Du Yongping, Wang Peng
Journal of China & Foreign Highway
To improve the alignment in the old road reconstruction project，stress analysis was carried out，and the alignment and smoothness parameters were used as the major variables in the dynamic equation.A “human-vehicle-road ” dynamic analysis model was established，and alignment comparison groups were set，with only one group set with easing vertical curves.The Newmark- β method was used for programming and calculating the dynamic effects generated by the basic alignment with a radius of 7 000 m.The vibration indicators such as peak acceleration，root mean square of acceleration，vibration period，and frequency were used to analyze the dynamic effects of the basic alignment group.By analyzing the causes …
Mechanism Of Anti‑Collision Guardrails To Snow Drift Disasters On Highways, Peng Guodong, Xi Jianfeng, Zhang Siyuan, Li Min, Liu Ziwei, Xing Ruimin
Mechanism Of Anti‑Collision Guardrails To Snow Drift Disasters On Highways, Peng Guodong, Xi Jianfeng, Zhang Siyuan, Li Min, Liu Ziwei, Xing Ruimin
Journal of China & Foreign Highway
With the continuous promotion of China ’s strategy of building the country with a strong transportation network，the proportion of high-grade highways in the road network continues to increase，and the number of traffic safety facilities is increasing.Xilingol League in the Inner Mongolia Autonomous Region has a long winter and strong wind，which is one of the typical areas in China deeply affected by snow drift disasters.Through field investigation，it is found that “road snow resistance ” “visual range obstacle ” and other snow drift disasters caused by traffic safety facilities are also increasingly prominent，which seriously restricts the effective play of road transportation functions …
Innovative Exploration For Green Construction Of Highway Bridges In Dense Urban Areas, Liu Xuexin, Zeng Lei, Meng Yuanying, Hao Guojun, Chen Yao
Innovative Exploration For Green Construction Of Highway Bridges In Dense Urban Areas, Liu Xuexin, Zeng Lei, Meng Yuanying, Hao Guojun, Chen Yao
Journal of China & Foreign Highway
In order to improve the green construction level of highways in dense urban areas，the project characteristics and engineering requirements of the Nansha-Zhongshan Expressway were analyzed，and the concept of green development was implemented in the whole life cycle of highway design，construction，operation，maintenance，and management.The research and development of ten innovative technologies in four categories were highlighted，including industrial intelligent construction of highway bridges，comprehensive utilization of highway resources，environmental protection of highways in coastal wet areas，and integrated design of transportation and tourism in the Guangdong-Hong Kong-Marco Greater Bay Area.Among them，the prefabricated beam annular production line and non-standard eight-lane were the unprecedented technologies first used in the …
Comparison Of Chinese ， Ame Rican， And Bangladeshi Criteria For Liquefaction Judgment O F Fine‑Grained Soil, Wu Zi
Journal of China & Foreign Highway
The criteria for liquefaction judgment of fi ne-grained soil in current seismic design codes of China，the United States，and Bangladesh are quite different.In order to propose the judgment criteria for engineering application and Chinese code revision，this paper compared the judgment processes and criteria of the three countries.After analyzing the formation process，based on the application of the criteria for liquefaction judgment of 168 fine-grained soil samples collected in Dhaka，Bangladesh and surrounding cities，the rationality of each judgment process and criteria was evaluated comprehensively.Finally，a set of judgment processes and result criteria for fine-grained soil liquefaction integrating all criteria were put forward.
Bonding Performance Of Chip Seal Containing Waste Tire Rubber Particles, Chen Jianmin, Liu Donghai, Wang Jinyu, Liu Haozhi
Bonding Performance Of Chip Seal Containing Waste Tire Rubber Particles, Chen Jianmin, Liu Donghai, Wang Jinyu, Liu Haozhi
Journal of China & Foreign Highway
In order to promote the reuse of waste tires and reduce environmental pollution，chips were replaced with the same volume of waste tire rubber particles to prepare a new rubber particle chip seal pavement.In order to ensure the bonding between asphalt and aggregate of the rubber particle chip seal，the surface of rubber particles was processed，and the texture characteristics of chip seal specimens with different aggregate particle sizes and rubber content were evaluated.The five indexes of rubber particle content，aggregate particle size ratio，shedding rate，structural depth，and pendulum friction coefficient were correlated and evaluated by SPSS，and the MMLS 3 test was conducted to simulate the …
Analysis Of Ballistic Capability In Making Bulletproof Multilayers Using Woven Ramie Fiber, Hardfacing Metal With Epoxy Matrix For Bulletproof Vests, Rizal Wahyu Permana, Syamsul Hadi, Bima Cahya Maula Dana
Analysis Of Ballistic Capability In Making Bulletproof Multilayers Using Woven Ramie Fiber, Hardfacing Metal With Epoxy Matrix For Bulletproof Vests, Rizal Wahyu Permana, Syamsul Hadi, Bima Cahya Maula Dana
Journal of Mechanical Engineering Science and Technology (JMEST)
Bulletproof material in level III bulletproof vests must be created using hard and soft materials to prevent bullet penetration. Kevlar and SiC + PE are imported materials used as armor in bulletproof vests. The use of Kevlar and SiC is very dependent on foreign sources with high prices. An innovation was carried out by making bulletproof material using cheaper multilayer methods involving metal from hardfacing welding as a hard layer and ramie fiber as a soft layer with an epoxy matrix. To see the level of penetration and surface morphology structure in the specimens, 9 variations were made: 3 layers …
Study Of A Remote Wind Resource Assessment System Integrated With Internet Of Things, Filian Arbiyani, Filbert Filbert, Anthony Nathanael Theo
Study Of A Remote Wind Resource Assessment System Integrated With Internet Of Things, Filian Arbiyani, Filbert Filbert, Anthony Nathanael Theo
Journal of Mechanical Engineering Science and Technology (JMEST)
Wind energy is an emerging and popular source of clean energy due to its non-polluting nature and low cost. The efficient use of wind energy requires accurate and precise wind parameter measurements, which is where wind resource assessment (WRA) comes into play. The IoT and cloud-based systems have been applied to remote monitoring systems and provide crucial solutions for data acquisition, storage, and analytics in wind energy technology. This study aims to build a remote WRA system integrated with the Internet of Things. This study utilizes an Arduino Uno microcontroller, RK100-01 wind speed sensor, BMP280 temperature and pressure sensor, and …
Metal Casting Furnace Design Development Using Computer Simulation, Ramadhan Wahyu Irianto, Yanuar R.A. Pradana, Suprayitno Suprayitno
Metal Casting Furnace Design Development Using Computer Simulation, Ramadhan Wahyu Irianto, Yanuar R.A. Pradana, Suprayitno Suprayitno
Journal of Mechanical Engineering Science and Technology (JMEST)
Metal foundries still rely heavily on crucible furnaces. The current furnace design, which is currently being used by the partner industry, has been found to be not properly designed and will result in a reduction in efficiency. CFD simulation will be used to find the optimal melting furnace design. This research simulation consists of 3 stages: pre-processing, solving, and post-processing. There are two furnace geometries, cylindrical and hexagonal, while the burner location will be divided into 3 positions, namely P1, P2, and P3. The most optimal furnace design will be used as a basis for the verification testing process. The …
Evolution Of Residual Stress, Crystal Orientation, And Texture On Preheating Weld Treatment Of Low Carbon Steel Astm A572 Grade 42, Suratno Adi Saputro, Andoko Andoko, Poppy Puspitasari
Evolution Of Residual Stress, Crystal Orientation, And Texture On Preheating Weld Treatment Of Low Carbon Steel Astm A572 Grade 42, Suratno Adi Saputro, Andoko Andoko, Poppy Puspitasari
Journal of Mechanical Engineering Science and Technology (JMEST)
Preheating is one type of heat treatment on the material prior to starting the welding process by increasing the temperature of the material. It is used to reduce the cooling rate during the welding processes to minimize the risk of residual stress and cracking during welding. Besides the benefits of welding, it also has a negative impact, especially on the integrity of the material, because the heating process at high temperatures will cause residual stress, which will affect the mechanical properties, chemical composition, and microstructure of the material, especially on Heat Affected Zone (HAZ). This study aims to analyze the …
Static And Modal Analysis Of A Box Structured Satellite Deployment Mechanism With Self-Actuated Torsion Joint, Dongping Sheng, Renzhe Ma, Chun Su
Static And Modal Analysis Of A Box Structured Satellite Deployment Mechanism With Self-Actuated Torsion Joint, Dongping Sheng, Renzhe Ma, Chun Su
Journal of Mechanical Engineering Science and Technology (JMEST)
A brand-new satellite deployment mechanism with boxed structure and self-actuated torsion joints is proposed and an effective method to verify the feasibility of this mechanism is established in this paper. This mechanism has the characteristics of high base frequency, high ratio of deployed and folded space occupation ratio. In order to meet the design requirements, the related analysis and optimization need to be conducted, and several conclusions are obtained. Firstly, the modal analysis of deployment mechanism at folded and fully deployed state is analyzed, and the result showed that the proper wall thickness is the key parameter to satisfy the …
A Review Of Fault Detecting Devices For Belt Conveyor Idlers, Fahad Alharbi, Suhuai Luo
A Review Of Fault Detecting Devices For Belt Conveyor Idlers, Fahad Alharbi, Suhuai Luo
Journal of Mechanical Engineering Science and Technology (JMEST)
The shift towards automated inspection methods represents considerable progress in conveyor system maintenance, enhancing safety and efficiency while posing challenges in data analysis and implementation costs. This study critically analyses sensor technologies and inspection methods for detecting faults in conveyor belt idlers, highlighting their essential role in preserving the operational integrity of industrial conveyor systems. By synthesizing various research findings, the study assesses the effectiveness of different sensor devices in identifying defects, including built-in sensors, fixed sensor options like acoustic, ultrasonic sensors, cameras, accelerometers, and Distributed Optical Fibre Sensors (DOFS), as well as mobile sensor systems. Our findings emphasize the …
Simulation Of The Performance Of Kevlar Impregnated Shear Thickening Fluid Ballistic Test Results, Ridwan Prasetya, Andoko Andoko, Suprayitno Suprayitno
Simulation Of The Performance Of Kevlar Impregnated Shear Thickening Fluid Ballistic Test Results, Ridwan Prasetya, Andoko Andoko, Suprayitno Suprayitno
Journal of Mechanical Engineering Science and Technology (JMEST)
This study explores the enhancement of Kevlar fabric’s ballistic performance through impregnation with Shear Thickening Fluid (STF) for potential application in soft body armor. The experimental approach often fails to elucidate mechanical phenomena critical for the development of lightweight and high-strength body armor designs. To address this limitation, the finite element method, specifically using ANSYS/LS-DYNA R.13, was employed for a comprehensive analysis. The simulation aimed to evaluate the impact of STF on Kevlar fabric by assessing projectile velocity, force exerted by the projectile onto the fabric, displacement, stress distribution, and fabric failure mechanisms. Kevlar yarn was modeled as a shell …
Analysis Of Avgas Fuel Spraying Schemes Using The Ansys Application Approach, Dimas Endrawan Putra, Nasrul Ilminnafik, M Fahrur Rozy Hentihu, Muh. Nurkoyim Kustanto, Danang Yudistiro, Skriptyan N.H. Syuhri
Analysis Of Avgas Fuel Spraying Schemes Using The Ansys Application Approach, Dimas Endrawan Putra, Nasrul Ilminnafik, M Fahrur Rozy Hentihu, Muh. Nurkoyim Kustanto, Danang Yudistiro, Skriptyan N.H. Syuhri
Journal of Mechanical Engineering Science and Technology (JMEST)
Avgas fuel consumption on Cessna trainer aircraft is very high. However, there has been little research regarding spray impacts in Cessna aircraft engines. The phenomenon of avgas spray colliding with the cylinder wall may occur during fuel injection, resulting in a changed spray radius and height, which will affect the mixing of fuel and air. In several aspects, this affects engine performance and exhaust emissions on Cessna aircraft. This research aims to determine and study the phenomenon of spray impact on avgasfueled aircraft engines. The fuel spray in the study occurred in the combustion chamber using pressure from a fuel …