IRPN: Science最新文献_第2页

Investigation on Viscoelastic Properties of Cortical Surfaces Using Dynamic Mechanical Analysis 基于动态力学分析的皮质表面粘弹性研究

IRPN: Science Pub Date : 2017-12-21 DOI: 10.2139/ssrn.3101404

Rakesh Kumar, A. Tiwari, P. Sihota, Dharmendra Tripathi, Navin Kumar, A. Ahmad, S. Ambwani

{"title":"Investigation on Viscoelastic Properties of Cortical Surfaces Using Dynamic Mechanical Analysis","authors":"Rakesh Kumar, A. Tiwari, P. Sihota, Dharmendra Tripathi, Navin Kumar, A. Ahmad, S. Ambwani","doi":"10.2139/ssrn.3101404","DOIUrl":"https://doi.org/10.2139/ssrn.3101404","url":null,"abstract":"In silico models of bone adaptation attempted to simulate loading-induced osteogenesis (i.e. new bone formation) at cortical bone surfaces (periosteal and endocortical). These models, however, fall short in fitting the site-specific new bone formation at cortical envelops especially at endocortical surface. An anticipated reason may be that same mechanical properties were considered for both periosteal and endocortical surfaces, whereas, properties may be different and location-specific at the two surfaces. Site-specific mechanical properties at cortical bone envelops are not investigated well in the literature. This study mainly aims to characterize mechanical properties (especially viscoelastic properties) at periosteal and endocortical surfaces of Wistar rats femora using Dynamic Mechanical Analysis (DMA). Viscoelastic properties such as storage and loss moduli are estimated. Properties are also compared along anterior, posterior, medial, and lateral sites of cortex at both surfaces. Experimental outcomes indicate that periosteal surface has higher stiffness than endocortical surface across all the anatomical locations, in which, medial region had highest stiffness at the two surfaces. These findings may be useful in developing advanced computer models to precisely predict osteogenesis which may help clinicians in providing informed recommendation on biomechanical strategies such as physical exercise to treat site-specific bone loss.","PeriodicalId":198407,"journal":{"name":"IRPN: Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128009189","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: 1

Synthesis, Characterization and Properties Evaluation of ZrO2 and Its Composites – A Review ZrO2及其复合材料的合成、表征及性能评价

IRPN: Science Pub Date : 2017-12-21 DOI: 10.2139/ssrn.3101419

C. Srikanth, G. Madhu

引用次数: 1

Study of Flow Characteristics of Air in DI Diesel Engine by Modification in Intake Valve 进气门改造对直喷柴油机空气流动特性的影响

IRPN: Science Pub Date : 2017-12-21 DOI: 10.2139/ssrn.3102078

Akshay Pofalkar, N. Borse, D. Hulwan

引用次数: 0

Effective Gear Teeth Defect Identification Using Multi-Domain Feature Extraction 基于多域特征提取的有效齿轮齿缺陷识别

IRPN: Science Pub Date : 2017-12-21 DOI: 10.2139/ssrn.3101371

L. Dhamande, M. Chaudhari

引用次数: 0

An Alternate Approach to Friction Factor Computations Based on Entropy Generation in Gas Micro Flows 气体微流动中基于熵生成的摩擦因数计算方法

IRPN: Science Pub Date : 2017-12-21 DOI: 10.2139/ssrn.3101266

S. Prabhu, S. Mahulikar

引用次数: 0

Performance Analysis of Solar Air Dryer for Multi Crop Drying – Effect of Varying Air Mass Flow Rate 太阳能干燥机多作物干燥性能分析——不同空气质量流量的影响

IRPN: Science Pub Date : 2017-12-21 DOI: 10.2139/ssrn.3101275

Mitul Y Doshi, Aman Jain, K. Patil

{"title":"Performance Analysis of Solar Air Dryer for Multi Crop Drying – Effect of Varying Air Mass Flow Rate","authors":"Mitul Y Doshi, Aman Jain, K. Patil","doi":"10.2139/ssrn.3101275","DOIUrl":"https://doi.org/10.2139/ssrn.3101275","url":null,"abstract":"In India open sun crop drying is very popular technique for drying, however solar air dryers are used for crop drying in many places. The solar air dryers are designed and fabricated for a particular crop and have limited usage. The solar air dryers are available in different sizes and configurations. The solar dryer performance depends on various input parameters such as inlet temperature of the air, type of absorber material, type of configuration of solar air dryer, mass flow rate of air, overall heat transfer coefficient, solar radiation, etc. The present article discusses the effects of various parameters on the useful heat gain, instantaneous thermal efficiency of solar air dryer, temperature rise with change in mass flow rate of air, input air temperature, overall heat transfer coefficient and solar air collector area. It is observed that the optimum mass flow rate of air for maximum useful heat gain is 0.05 kg/s. Further, increase in the area will not yield any advantage for overall heat gain. The instantaneous thermal efficiency for various mass flow rates is around 88%. The overall heat transfer effect increases the instantaneous thermal efficiency up to 0.1 kg/s air mass flow rate and thereafter no significant change in the efficiency. The input air temperatures do not yield much effect on the useful heat gain and rise in temperature.","PeriodicalId":198407,"journal":{"name":"IRPN: Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132421055","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

Effect of Grain Orientation on Scratch Testing 晶粒取向对划痕测试的影响

IRPN: Science Pub Date : 2017-12-21 DOI: 10.2139/ssrn.3101693

M. Kothari, Yogesh S. Gaikhe, Taha Khot, A. S. Rao, A. Tewari

引用次数: 1

Parametric Optimization of Fused Deposition Modelling (FDM) Process Using PSO Algorithm 基于粒子群算法的熔融沉积建模(FDM)过程参数优化

IRPN: Science Pub Date : 2017-12-21 DOI: 10.2139/ssrn.3101978

Aniket Shirke, C. Choudhari, S. Rukhande

{"title":"Parametric Optimization of Fused Deposition Modelling (FDM) Process Using PSO Algorithm","authors":"Aniket Shirke, C. Choudhari, S. Rukhande","doi":"10.2139/ssrn.3101978","DOIUrl":"https://doi.org/10.2139/ssrn.3101978","url":null,"abstract":"3D Printing is a layered manufacturing process that builds prototypes by depositing material in layered form using heaters. Prototypes made by 3D Printing are widely used in product development as they can be used for product testing. Prototypes should have a very good mechanical property for functional performance as well as aesthetics. The mechanical properties in 3D printing depends upon different process parameters, namely Layer Thickness, Nozzle Diameter, Infill Density, Part Bed Temperature, Skin Thickness, Raster Angle of Deposition, Raster Width and Length of the parts. In this present work, an attempt has been made to improve the mechanical property, tensile strength of prototypes of Acrylonitrile Butadiene Styrene (ABS) parts fabricated using Fused Deposition Modelling process of 3D Printing. Experiments are conducted using Taguchi’s design of experiments with three levels for each factor. Experiments were carried out on FDM Accucraft i250 machines coupled with KIS-Slicer software and ABS as main material. Parameter effect on tensile strength and there interaction are studied in taguchi method. Using Particle Swarm Optimization (PSO) algorithm optimal values of process parameter are found studied for maximum tensile strength.","PeriodicalId":198407,"journal":{"name":"IRPN: Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116817496","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: 3

Comparative Study of Aerodynamic and Aeroacoustic Behavior of Flat Plate Airfoils With Different Trailing Edge Geometry 不同后缘几何形状平板翼型气动与气动声学性能比较研究

IRPN: Science Pub Date : 2017-12-21 DOI: 10.2139/ssrn.3101286

Uddipta Gautam, S. Jha, S. Narayanan, L. Kumarswamidhas

{"title":"Comparative Study of Aerodynamic and Aeroacoustic Behavior of Flat Plate Airfoils With Different Trailing Edge Geometry","authors":"Uddipta Gautam, S. Jha, S. Narayanan, L. Kumarswamidhas","doi":"10.2139/ssrn.3101286","DOIUrl":"https://doi.org/10.2139/ssrn.3101286","url":null,"abstract":"The present study compares the aerodynamic and aeroacoustic behavior of the flow past two flat plate airfoils; viz. blunted trailing edge and sharp trailing edge, having a fixed aspect ratio of 1.867. The study is performed experimentally showing variance in lift and drag at two different velocity of 20m/s and 30m/s and at different angles of attack, viz. 5°, 12°, 20°, 25°, 30°. All the models are prepared by mild steel and the studies are conducted using 300×300×1000 mm subsonic wind tunnel. Results show that the drag coefficient in sharp trailing edge reduces significantly by a maximum amount of 22%. The lift coefficient, however, does not change significantly. Uncertainty analysis performed shows that maximum percentage of uncertainty in each case is less than 5%. Aero acoustic measurement of the noise radiated by the trailing edge of the two flat plates is performed in a reflecting environment at a velocity of 20m/s and at two different angles of attack of 10° and 15° with ¼’’ inch far field microphone mounted near the trailing edge of the airfoil in the test section. The spectra obtained indicate that the noise from the sharp trailing edge is consistently lower than the blunt trailing edge. Thus, this paper adequately demonstrates the role of trailing edge in modifying the aerodynamic as well as aero acoustic characteristic.","PeriodicalId":198407,"journal":{"name":"IRPN: Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122017584","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

Two Phase Heat Transfer Coefficient for Minichannel Condensers 小通道冷凝器的两相传热系数

IRPN: Science Pub Date : 2017-12-21 DOI: 10.2139/ssrn.3101285

V. Bhatkar, V. Kriplani, G. Awari

引用次数: 0