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Ballistic Response of Confined Ceramic/Metal Armor System Against Long Projectile 密闭陶瓷/金属装甲系统对长弹丸的弹道响应
Advanced Science, Engineering and Medicine Pub Date : 2020-11-01 DOI: 10.1166/asem.2020.2605
Dilip Chougale, G. Tiwari
{"title":"Ballistic Response of Confined Ceramic/Metal Armor System Against Long Projectile","authors":"Dilip Chougale, G. Tiwari","doi":"10.1166/asem.2020.2605","DOIUrl":"https://doi.org/10.1166/asem.2020.2605","url":null,"abstract":"A numerical analysis has been performed to compare the ballistic performance of two distinct confined ceramic/metal armor system, alumina tiles backed by steel 4340 and alumina tiles backed by aluminum 5083 H116. A 76.2 mm long and 7.62 mm diameter cylindrical projectile with hemisphere\u0000 nosed shape made of tungsten alloy and harden steel were hit normally with velocity 1550 m/s on both the target configuration. For these threats, under constant thickness, ceramic/metal configuration that defeated the projectile was studied through finite element simulation on ANSYS/LS DYNA.\u0000 Depth of penetration of projectile in target, residual velocity of projectile, erode length of the projectile, ballistic limit were used to study the ballistic performance of target configurations. For alumina, Johnson Holmquist (JH-2) material model was used whereas for steel, tungsten and\u0000 aluminum, Johnson Cook (JC) model was considered. For identical thickness, Alumina/Steel target showed better performance as compare to Alumina/Al target under tungsten projectile impact whereas on the basis of areal density, Alumina/Al performed better than Alumina/steel against steel projectile\u0000 impact.","PeriodicalId":7213,"journal":{"name":"Advanced Science, Engineering and Medicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87368857","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
Design and Fabrication of 3D Printed Bioresorbable Nerve Guide Conduit (NGC) for Peripheral Nerve Repair 外周神经修复用3D打印生物可吸收神经导管的设计与制造
Advanced Science, Engineering and Medicine Pub Date : 2020-11-01 DOI: 10.1166/asem.2020.2610
Ankita Sharma, Chhavi Teotia, Pooja Bhati, M. Soni
{"title":"Design and Fabrication of 3D Printed Bioresorbable Nerve Guide Conduit (NGC) for Peripheral Nerve Repair","authors":"Ankita Sharma, Chhavi Teotia, Pooja Bhati, M. Soni","doi":"10.1166/asem.2020.2610","DOIUrl":"https://doi.org/10.1166/asem.2020.2610","url":null,"abstract":"In this study, 3D printing technology is utilized for the fabrication of designer structure bioresorbable Polylactic acid (PLA) NGCs for peripheral nerve regeneration. The designer structure of the NGCs is designed using solid works software. The bioresorbable PLA NGCs are printed using\u0000 an extrusion-based 3D printer. PLA thread of 1.75 mm diameter is employed for the fabrication of 6±0.5 mm internal diameter and 35±10 mm long NGCs. The conduits were tested for the mechanical properties, surface properties such as surface wettability of the conduits were evaluated\u0000 by measuring the water contact angle of the de-ionized water droplet deposited on the conduit surface. Fourier Transform Infrared Spectroscopy is used for the conduits surface chemistry study. Differential scanning Calorimetry (DSC) and Scanning Electron Microscopy (SEM) are used for the thermal\u0000 and morphological characterization.","PeriodicalId":7213,"journal":{"name":"Advanced Science, Engineering and Medicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73901145","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
Analytical Modeling of a Material Efficient Hollow Shaft Design 材料高效空心轴设计的解析建模
Advanced Science, Engineering and Medicine Pub Date : 2020-11-01 DOI: 10.1166/asem.2020.2596
S. Dangi, Aditya Kumar, Siddharth Choudhary
{"title":"Analytical Modeling of a Material Efficient Hollow Shaft Design","authors":"S. Dangi, Aditya Kumar, Siddharth Choudhary","doi":"10.1166/asem.2020.2596","DOIUrl":"https://doi.org/10.1166/asem.2020.2596","url":null,"abstract":"This paper discusses the optimal distribution of material across the cross-section of a shaft under pure uniform torsional loads such that the factor of safety and thereby the shear stresses generated at any point in the cross-section remain largely the same irrespective of their radial\u0000 distance from the centre of the shaft. An analytical mathematical relationship is deduced to relate the material distribution as a function of the radial distance. The relationship is then used to plot the corresponding variation in MATLAB. Finally, several CAD models of the proposed cross-sectional\u0000 shapes are prepared in SolidWorks, and then simulated in ANSYS simulation software by employing the Static Structural analysis platform. The graphical and statistical results of the shear stress distributions are then compared with a solid shaft of the exact same radial and axial dimensions.\u0000 It is found that the proposed 3-Branched model is about 25% more efficient in material utilization than the conventionally employed solid shaft of similar dimensions.","PeriodicalId":7213,"journal":{"name":"Advanced Science, Engineering and Medicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87206315","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
Sensor Assisted Braking System in Automobiles 汽车传感器辅助制动系统
Advanced Science, Engineering and Medicine Pub Date : 2020-11-01 DOI: 10.1166/asem.2020.2606
R. Janani, Aparna, Hari Hara Ganesh
{"title":"Sensor Assisted Braking System in Automobiles","authors":"R. Janani, Aparna, Hari Hara Ganesh","doi":"10.1166/asem.2020.2606","DOIUrl":"https://doi.org/10.1166/asem.2020.2606","url":null,"abstract":"One of the fastest growing industries in the world in terms of high demand as well in technological development is Automobile Industry. There have been a lot of technological concepts introduced in automotive industry to improve comfort, more efficiency, cost reduction and eco-friendly.\u0000 From the past century, the braking system of vehicle hasn’t evolved much. Today from small to exotic vehicles use only two types braking system are Disc and Drum Brakes, and their mode of operation are the Hydraulic and pneumatic actuations respectively. The 60+ percentage of brake system\u0000 used in automobile are hydraulic whereas the remaining is pneumatic brake system. They have separate booster getting input from the brake pedal to stop vehicle, and separate hose lining to all four wheel. In this Sensor assisted braking system, the booster, hosing and mechanical systems are\u0000 removed and sensor acts as input and actuator actuate the brake system.","PeriodicalId":7213,"journal":{"name":"Advanced Science, Engineering and Medicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85422510","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
Characterization and Growth Kinetics of a Multispecies Periodontal Biofilm Developed in a Stirred Bioreactor 搅拌生物反应器中多菌种牙周生物膜的表征及生长动力学
Advanced Science, Engineering and Medicine Pub Date : 2020-11-01 DOI: 10.1166/asem.2020.2687
Maick Meneguzzo Prado, D. J. Kovalski, W. B. Torrez, B. Bueno-Silva, M. Feres, J. de Almeida, L. Porto
{"title":"Characterization and Growth Kinetics of a Multispecies Periodontal Biofilm Developed in a Stirred Bioreactor","authors":"Maick Meneguzzo Prado, D. J. Kovalski, W. B. Torrez, B. Bueno-Silva, M. Feres, J. de Almeida, L. Porto","doi":"10.1166/asem.2020.2687","DOIUrl":"https://doi.org/10.1166/asem.2020.2687","url":null,"abstract":"This study aimed to validate an in vitro periodontal biofilm model with complex subgingival microbial communities grown in a stirred bioreactor. Experimental biofilms were characterized and examined for their growth kinetics over time. After incubation under anaerobic conditions\u0000 for 3 days, biofilm cultures formed on the substrate were collected and analyzed. The specific growth rate in the exponential phase was estimated to be 0.3915 h−1, with no significant differences in growth kinetics and CFU counts between the replicates (P > 0.05).\u0000 The biofilm architecture was consistent in each time-point, with bacterial cells presenting different morphology and completely colonizing the cementum surface. To conclude, the three-day subgingival biofilm model developed in our study successfully mimicked the growth of complex microbial\u0000 communities.","PeriodicalId":7213,"journal":{"name":"Advanced Science, Engineering and Medicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79913660","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
Improving the Working Characters of a Dici Engine Operated on Biofuel Blends Using Nano Additives 纳米添加剂改善生物燃料混合燃料发动机的工作特性
Advanced Science, Engineering and Medicine Pub Date : 2020-11-01 DOI: 10.1166/asem.2020.2592
P. Mebin Samuel, G. Devaradjane, V. Gnanamoorthi, M. Manimaran
{"title":"Improving the Working Characters of a Dici Engine Operated on Biofuel Blends Using Nano Additives","authors":"P. Mebin Samuel, G. Devaradjane, V. Gnanamoorthi, M. Manimaran","doi":"10.1166/asem.2020.2592","DOIUrl":"https://doi.org/10.1166/asem.2020.2592","url":null,"abstract":"The increase in energy scarcity for all the vehicular needs with the increase in pollution leading to the environmental concerns especially in developing countries like India pushes the researchers towards finding a new source of energy with lesser emissions. This particular study was\u0000 performed to improve the characteristics of 4 stroke, mono cylinder diesel engine by means of 20% and 40% mixtures of Jamun bio-diesel for two proportions of Rice husk Nano-additives (0.1% and 0.2%). Result illustrates that for J20 with 0.2% additive, Brake Thermal Efficiency reduces by 2.1%\u0000 with Brake Specific Fuel Consumption increasing by 3.8%. In addition, emissions such as Hydro Carbon, Carbon monoxide and Smoke were reduced by 23.78%, 18.32%, 21.4% by a insignificant growth in oxides of Nitrogen by 11.32%. Result states J20 with 0.2% additive can be effectively used without\u0000 any modifications and helps in reducing emissions with slight reduction in performance parameters.","PeriodicalId":7213,"journal":{"name":"Advanced Science, Engineering and Medicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75718632","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
Conversion of Stationary Diesel Engine into Producer Gas-Engine Operated in Spark Ignited Mode 固定式柴油机向火花点火式燃气发动机的转化
Advanced Science, Engineering and Medicine Pub Date : 2020-11-01 DOI: 10.1166/asem.2020.2602
Vikas Attri, P. Sharma, Avdhesh Sharma
{"title":"Conversion of Stationary Diesel Engine into Producer Gas-Engine Operated in Spark Ignited Mode","authors":"Vikas Attri, P. Sharma, Avdhesh Sharma","doi":"10.1166/asem.2020.2602","DOIUrl":"https://doi.org/10.1166/asem.2020.2602","url":null,"abstract":"Decentralized power supply for remote and urban areas via gasifier-engine system is an attractive choice especially when sources of fossil fuel are getting depleted and leading to serious emission hazards. In gasifier, the solid biomass is converted into “producer gas,”\u0000 which can fuel a gas-engine in single fuel mode i.e., complete substitution. The conversion of stationary diesel engine into producer gas-engine (i.e., complete substitution) ensure complete independency from fossil fuels; although it demands major modifications/retrofitting arrangements.\u0000 Herein, an existing diesel engine of capacity 7.4 kW is chosen and converted into producer gas-engine operated on single fuel mode (spark ignited) at compression ratio of 14:1. Other arrangements such as installation of spark ignited mode (i.e., ignition coil and distributor followed by contact\u0000 breaker unit), gasoline carburetor and special induction system followed by other necessary arrangements were carried out. A kit is suggested for conversion of different capacity and types engines utilizing alternate/renewable gaseous fuels. A considerable power loss (power derating) and reduction\u0000 in thermal efficiency is observed while operation in single producer gas mode. More detailed experiments are required to predict qualitative performance trends.","PeriodicalId":7213,"journal":{"name":"Advanced Science, Engineering and Medicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77019476","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
Design of Pneumatic System for Automatic Door Opening and Closing 自动开门、关门气动系统的设计
Advanced Science, Engineering and Medicine Pub Date : 2020-11-01 DOI: 10.1166/asem.2020.2612
Nandini Kaushik, Shruti Jain, M. Soni, Pooja Bhati
{"title":"Design of Pneumatic System for Automatic Door Opening and Closing","authors":"Nandini Kaushik, Shruti Jain, M. Soni, Pooja Bhati","doi":"10.1166/asem.2020.2612","DOIUrl":"https://doi.org/10.1166/asem.2020.2612","url":null,"abstract":"There are huge steel doors inside mines which are huge and heavy; techniques that can handle such heavy loads have to be used for automatically operating them. From hydraulic to pneumatic systems, multiple techniques are available for actuating heavy loads, but when we deal with mines\u0000 and tunnels, solutions need to be leak proof, explosion-free and safe. Pneumatic systems offer provides a better alternative in such working conditions. In terms of cost as well, pneumatic systems are substantially cheaper than most other systems. The work is based on an automatic operating\u0000 mechanism using Directional Control Valves (DCV’s) to facilitate opening and closing of doors from both sides. The FluidSim simulation software is considered for designing the pneumatic circuit diagram. The hardware connections have been further developed based on the simulation obtained.\u0000 Further design analysis of the mechanism has been considered for the developed hardware. A proposed model for more intelligent design based on Programmable Logic Controllers, Supervisory Control and Data Acquisition (SCADA) and ultrasonic sensors have been suggested further.","PeriodicalId":7213,"journal":{"name":"Advanced Science, Engineering and Medicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87157015","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
Computational Fluid Dynamics Study of Roughened Solar Air Heater 粗糙化太阳能空气加热器的计算流体动力学研究
Advanced Science, Engineering and Medicine Pub Date : 2020-11-01 DOI: 10.1166/asem.2020.2595
A. Ghildyal, V. S. Bisht, A. Bisht, K. Kishor
{"title":"Computational Fluid Dynamics Study of Roughened Solar Air Heater","authors":"A. Ghildyal, V. S. Bisht, A. Bisht, K. Kishor","doi":"10.1166/asem.2020.2595","DOIUrl":"https://doi.org/10.1166/asem.2020.2595","url":null,"abstract":"A 2-dimensional numerical investigation has been conducted to examine the effect of three distinct turbulators (namely M shaped, Wedge shaped and Reverse wedge shaped) on the performance of solar air heater (SAH) for relevant Reynolds number ranges from 4000 to 18000. CFD code ANSYS\u0000 FLUENT is used for simulation of turbulent airflow. For all three geometries constant ratio of e/Dh = 0.021 (where e = 0.7 and Dh = 33.33) and ratio P/e = 14.285 (where p = 10) is used. Turbulence Kinetic energy and velocity contours\u0000 for all turbulators have also been studied in this analysis. M-Shaped turbulators outperformed the other two turbulators with maximum value of THPP.","PeriodicalId":7213,"journal":{"name":"Advanced Science, Engineering and Medicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74292984","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
Finite Element Method (FEM) Analysis for the Design and Optimization of a Cross Floating Valve for Pressure Metrology Applications 压力计量用十字浮阀设计与优化的有限元分析
Advanced Science, Engineering and Medicine Pub Date : 2020-11-01 DOI: 10.1166/asem.2020.2603
S. Rab, S. Yadav, Abid Haleem, Rahul Kumar, R. Sharma, L. Kumar, V. Gupta, A. Zafer
{"title":"Finite Element Method (FEM) Analysis for the Design and Optimization of a Cross Floating Valve for Pressure Metrology Applications","authors":"S. Rab, S. Yadav, Abid Haleem, Rahul Kumar, R. Sharma, L. Kumar, V. Gupta, A. Zafer","doi":"10.1166/asem.2020.2603","DOIUrl":"https://doi.org/10.1166/asem.2020.2603","url":null,"abstract":"In pressure metrology, cross floating of pressure balances is used for the accurate and precise measurements of pressure. In this method, a nearly perfect balance condition is required between 2 pressure balances used in a common pressure transmission circuit, one as standard and another\u0000 as device under calibration (DUC). Present paper describes the effect of stress analysis during the simulation in design, optimization and process of development of a manually actuated cross floating valve. Simulation studies have been carried out by using ANSYS software to analyze the behavior\u0000 of stress, strain, and subsequent deformation. The optimization tool is used to fix all the dimensions according to factor of safety and other design points. The valve thus developed was tested in the pressure range from atmospheric to 2500 bar and the results thus obtained are found excellent.","PeriodicalId":7213,"journal":{"name":"Advanced Science, Engineering and Medicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76790083","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
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