Journal of applied mechanical engineering最新文献_第9页

XFEM Potential Cracks Investigation using Two Classical Tests 基于两个经典试验的XFEM潜在裂纹研究

Journal of applied mechanical engineering Pub Date : 2017-02-08 DOI: 10.4172/2168-9873.1000251

M. C. Er, De Farias Mm, F. Evangelista

{"title":"XFEM Potential Cracks Investigation using Two Classical Tests","authors":"M. C. Er, De Farias Mm, F. Evangelista","doi":"10.4172/2168-9873.1000251","DOIUrl":"https://doi.org/10.4172/2168-9873.1000251","url":null,"abstract":"Extended Finite Element Method (XFEM) is used in this work, first to perform the simulation of crack initiation and propagation mechanisms in plane models and then to determine the stress distribution singularities in the closest surroundings of a front fracture inserted in three-dimensional models. The essentials of XFEM is the well-known Finite Element Method (FEM) adding to degrees of freedom and enrichment functions, which serve to describe local discontinuities in the model. In XFEM, the fracture geometry is developed independent of the mesh, allowing it to move freely through the domain, without the need to adapt the mesh to discontinuity. In other words, the XFEM reproduces the discontinuity of the displacement field along the fracture, without discretizing this feature directly in the mesh. XFEM carry out the spatial discretization of two classic models in Fracture Mechanics: the single-edge-notch bending test (SEN (B)); and the disck-shaped compact tension test (CDT). The propagation criterion is based on the proportion of energy released and the stress intensity factors (SIF). The solutions provided by the XFEM numerical model indicated an excellent agreement with the results obtained from the experimental data.","PeriodicalId":90573,"journal":{"name":"Journal of applied mechanical engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43506731","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

Effectiveness Analysis of Double Pipe Heat Exchanger with Curls Band in Various Angles 不同角度卷曲带双管换热器的有效性分析

Journal of applied mechanical engineering Pub Date : 2017-02-08 DOI: 10.4172/2168-9873.1000252

B Kirubadurai, F. Rahman, P. Velmurugan, Suresh Kumar

{"title":"Effectiveness Analysis of Double Pipe Heat Exchanger with Curls Band in Various Angles","authors":"B Kirubadurai, F. Rahman, P. Velmurugan, Suresh Kumar","doi":"10.4172/2168-9873.1000252","DOIUrl":"https://doi.org/10.4172/2168-9873.1000252","url":null,"abstract":"In the modern learning, effectiveness-NTU studies in a dual tube heat exchanger armed with curly band in view of numerous angles were experimentally deliberate. Additionally, discrepancy of the Dual effectiveness with heated water Reynolds numbers for dissimilar cold water flow rates were obtainable. These turbulators with unlike angles of 45 L, 60 L, 90 L, 120 L and 150 L were made of electrified plates with thickness of 1 mm and were attached in the internal tube of heat exchanger. The experimentations were conceded out at Reynolds numbers of 3000–13,400 at turbulent flow establishment. All over the research, hot and cold water rolled finished the internal pipe and the interplanetary between the pipes (annulus), correspondingly. It was strained to keep the bay hot and cold water temperatures at constant values. Effectiveness-NTU studies were made for the circumstances with and without curly bands including their different angles and associated to each other. Results displayed the substantial decision of turbulators on effectiveness (e) and number of heat transfer units (NTU) of dual tube heat exchanger. In totalling, some experiential associations uttering the domino effect were also industrialized constructed on curve fitting.","PeriodicalId":90573,"journal":{"name":"Journal of applied mechanical engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43927457","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

Optimal Design of Cap Screw Thread Runout for Transversal and Axial Loads 带帽螺钉在横向和轴向载荷作用下的螺纹跳动优化设计

Journal of applied mechanical engineering Pub Date : 2017-02-08 DOI: 10.4172/2168-9873.1000250

Sławomir Kędziora

{"title":"Optimal Design of Cap Screw Thread Runout for Transversal and Axial Loads","authors":"Sławomir Kędziora","doi":"10.4172/2168-9873.1000250","DOIUrl":"https://doi.org/10.4172/2168-9873.1000250","url":null,"abstract":"The presented work is focused on a design of a new thread runout of screws and bolts subjected by transversal loads. These types of loads can occur in a normal service of bolt connection and they can lead to a failure. Two failure modes of the screw could occur: self-loosening of the screw or fatigue failure of the screw. The latter failure mode is analysed in the presented project focusing on an improvement of the existing design of the screws in terms of fatigue failure. The fatigue fracture of the screws, which are loaded by the transversal load, occurs normally in a groove of a first thread run of an engagement. A shape of the thread runout has some influence on stress in the thread therefore that shape can optimize to minimize the thread stress. Considering this, free shape optimisation was employed to find the best runout shape. As results of the presented work, the optimum design of the thread runout is proposed for the analysed conditions. The elaborated design of the cap screw brings significant improvement of the lifetime when the cycling tangential load occurs. In addition, the new design gives the better structural performance than the existing designs also for the cycling normal loads.","PeriodicalId":90573,"journal":{"name":"Journal of applied mechanical engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4172/2168-9873.1000250","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44318045","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: 2

Ground Robotic Oil Spill Surveillance (Gross) System for Early Detectionof Oil Spills from Crude Oil Pipelines 用于原油管道溢油早期检测的地面机器人溢油监测(Gross)系统

Journal of applied mechanical engineering Pub Date : 2017-02-08 DOI: 10.4172/2168-9873.1000253

Ejofodomi Oa

{"title":"Ground Robotic Oil Spill Surveillance (Gross) System for Early Detectionof Oil Spills from Crude Oil Pipelines","authors":"Ejofodomi Oa","doi":"10.4172/2168-9873.1000253","DOIUrl":"https://doi.org/10.4172/2168-9873.1000253","url":null,"abstract":"Crude oil spills have negative impacts on the environment, health, society and economy. Prompt detection of oil spills would lead to swift remediation, improvement in national economy, and a reduction in the damage to the environment. The Ground Robotic Oil Spill Surveillance (GROSS) System is a novel system for early detection of oil spills using small mobile robots. A single GROSS unit is a mechanized robot employed to patrol beside designated pipelines. A Global Positioning System (GPS) is used for autonomous navigation, an ultrasonic sensor for avoiding obstacles, and gas sensors for spill detection. Once a spill is detected, an integrated camera module is used to take pictures of the oil spill site. Using Xbee radios, spill images and GPS location are transferred wirelessly to a computer in the base station to enable surveillance teams initiate established containment protocols. \u0000The GROSS system has been successfully tested on an underground crude oil pipeline at the Federal University of Petroleum Resources. The system’s ability to provide continuous surveillance along crude oil pipelines and wireless transmission of spill GPS location and images gives it the ability to detect oil spills quickly and ensure prompt response by surveillance teams.","PeriodicalId":90573,"journal":{"name":"Journal of applied mechanical engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41929807","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: 2

A New Chiral Beam Element for Modelling Chiral Honeycombs 一种用于模拟手性蜂窝的新型手性梁单元

Journal of applied mechanical engineering Pub Date : 2017-01-20 DOI: 10.4172/2168-9873.1000249

X. Lu, C. By, Tan V.B.C., Tay Te

引用次数: 1

Influence of Friction Models on the Dynamics of 2-DOF FrictionOscillator 摩擦模型对二自由度摩擦振荡器动力学的影响

Journal of applied mechanical engineering Pub Date : 2017-01-08 DOI: 10.4172/2168-9873.1000246

B. Alzuwayer, I. Haque

引用次数: 0

Performance Evaluation of the Cowpea Wet De-Hulling Machine 豇豆湿式脱壳机性能评价

Journal of applied mechanical engineering Pub Date : 2017-01-08 DOI: 10.4172/2168-9873.1000248

Kamaldeen Oladimeji Salaudeen, Awagu Ef, M. Isiaka, Arowora Ka

引用次数: 1

Finite Element Analysis of Internal Door Panel of a Car by Cons ideringBamboo Fiber Reinforced Epoxy Composite 考虑竹纤维增强环氧树脂复合材料的轿车内板有限元分析

Journal of applied mechanical engineering Pub Date : 2017-01-08 DOI: 10.4172/2168-9873.1000247

E. Eskezia, A. Abera, Daniel Tilahun

{"title":"Finite Element Analysis of Internal Door Panel of a Car by Cons ideringBamboo Fiber Reinforced Epoxy Composite","authors":"E. Eskezia, A. Abera, Daniel Tilahun","doi":"10.4172/2168-9873.1000247","DOIUrl":"https://doi.org/10.4172/2168-9873.1000247","url":null,"abstract":"In this paper work the dynamic structural Finite Element Analysis of internal door panel of a vehicle by considering bamboo fiber reinforced epoxy composite (BFREC) materials was conducted. The objective of the paper is to develop a suitable model of internal door panel for Toyota DX car, to conduct a transient dynamic structural analysis (stress and displacement analysis) of internal door panel by finite element method, to compare the performance of BFREC material with previously recommended materials of internal door panel. The door panel of Toyota Corolla DX model vehicle was used to develop the geometric model of the internal door panel by CATIA V5 R20 modeling software. This 3-D geometric model was imported to using ANSYS Workbench 15.0. The transient dynamic structural FEA was done after assigning loading and boundary conditions. The applied load considered for this analysis is the self-inertial weight of the panel due to the acceleration field produced while the door is closing. The equivalent stress and the displacement are noted and investigated to compare with the literatures revised. The result shows that, bamboo fiber reinforced epoxy composite panel has the smallest mass and equivalent stress values, as compared with the lignocellulosic composite and polypropylene one. Based on these realities, it is recommended that bamboo fiber reinforced with epoxy composite materials are suitable for internal structural automotive panel applications.","PeriodicalId":90573,"journal":{"name":"Journal of applied mechanical engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4172/2168-9873.1000247","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44447173","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: 4

Detection From Sub-Sea Crude Oil Pipelines 海底原油管道探测

Journal of applied mechanical engineering Pub Date : 2017-01-04 DOI: 10.4172/2168-9873.1000245

Ejofodomi Oa

{"title":"Detection From Sub-Sea Crude Oil Pipelines","authors":"Ejofodomi Oa","doi":"10.4172/2168-9873.1000245","DOIUrl":"https://doi.org/10.4172/2168-9873.1000245","url":null,"abstract":"Crude Oil Spills from subsea pipelines are typically detected after thousands of barrels of oil are spilled into the ocean, affecting marine life, reaching nearby shores and polluting land masses. The Underwater Robotic Oil Spill Surveillance (UROSS) system has been designed to provide constant and autonomous spill surveillance for subsea pipelines. M900 embedded Radio Frequency Identification tags and readers are used to identify pipeline section for surveillance. GY-521 gyrometer and XL-MaxSonar-WR1 ultrasound sensor are used for autonomous navigation beside the crude oil pipeline. Subsea crude oil spills are detected using a METS methane sensor. After spill detection, images of the spill site are captured with a L3C-400 Micro Ultras-Miniature Color Camera and spill location is obtained using Global Positioning System. Spill Images and location are transmitted to a remote PC on the nearest off shore platform using an Xbee Pro 900HP wireless Connection. An Ocean Signal rescueME Personal Beacon Locator also transmits a 406 MHz distress signal via satellite to Emergency Services indicating the identification of a spill. Finite Element Method analysis of the system showed its ability to withstand sea pressures at a depth of 2,250 m. Power analysis showed the system’s ability to remain submerged and to provide surveillance for 100 m section of a subsea pipeline once every 24 hours for over a full month, and this can be increased to once every hour for 51 months with some power modifications.","PeriodicalId":90573,"journal":{"name":"Journal of applied mechanical engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47349814","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

Delivering Medical Products to Quarantined Regions Using UnmannedAerial Vehicles 使用无人驾驶车辆向隔离地区运送医疗产品

Journal of applied mechanical engineering Pub Date : 2017-01-04 DOI: 10.4172/2168-9873.1000244

Otiede Ed, Odeyemi Mm, N. I, Onuoha C, Awal Si, A. O, Adebayo Vk, Itoro E, Ejejigbe Tr, Ejofodomi Oa, Ofualagba G

{"title":"Delivering Medical Products to Quarantined Regions Using UnmannedAerial Vehicles","authors":"Otiede Ed, Odeyemi Mm, N. I, Onuoha C, Awal Si, A. O, Adebayo Vk, Itoro E, Ejejigbe Tr, Ejofodomi Oa, Ofualagba G","doi":"10.4172/2168-9873.1000244","DOIUrl":"https://doi.org/10.4172/2168-9873.1000244","url":null,"abstract":"Unmanned aerial Vehicles (UAVs) possess the capacity to transport goods quickly, safely, and inexpensively across both accessible and inaccessible terrains such as to stranded mountain climbers or boats adrift. Medical supplies are typically delivered by ground transport as well as aircraft, both fixed and rotor wing. During emergencies, the availability of blood products and pharmaceuticals is often limited at critical access hospitals, and conventional channels of supply may become disrupted. This article aims to demonstrate the feasibility of using small UAVs to transport pharmaceutical products to epidemic-stricken regions. \u0000A Syma X5-c quadcopter was loaded with a sample drug. Using its accompanying transmitter, the drone was flown from a base location to a pre-determined delivery location. Upon successful delivery of the drug, the drone was navigated back to base by the operator. Future improvements to the drone model include facial identification system to verify recipients before delivery, auto-pilot control of drone with the aid of an on-board computer program and a GPS unit, real-time picture, and video relay/transmission back to control station, and autonomous delivery of drug without requiring physical contact from the recipient.","PeriodicalId":90573,"journal":{"name":"Journal of applied mechanical engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4172/2168-9873.1000244","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44871437","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: 7