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SOME COMPARATIVE OPINIONS REGARDING THE EVALUATION OF MAXIMUM STRESSES IN LONG FIBER REINFORCED COMPOSITES 关于长纤维增强复合材料最大应力评定的一些比较意见
Journal of Engineering Studies and Research Pub Date : 2022-10-27 DOI: 10.29081/jesr.v28i3.007
R. Iatan, Nicoleta Sporea, Carmen T. Popa, Luminita Georgiana Enachescu, Cosmin Ciocoiu, Melania CORLECIUC (MITUCA), A. -. S. Nitu
{"title":"SOME COMPARATIVE OPINIONS REGARDING THE EVALUATION OF MAXIMUM STRESSES IN LONG FIBER REINFORCED COMPOSITES","authors":"R. Iatan, Nicoleta Sporea, Carmen T. Popa, Luminita Georgiana Enachescu, Cosmin Ciocoiu, Melania CORLECIUC (MITUCA), A. -. S. Nitu","doi":"10.29081/jesr.v28i3.007","DOIUrl":"https://doi.org/10.29081/jesr.v28i3.007","url":null,"abstract":"This paper falls within the scope of current concerns for scientific and technical research, relating to technical structures made of composite materials, recognized for their mechanical, thermal and chemical or erosive resistance characteristics. In this case, the study is characterized by the analysis of the bearing capacity of some composites: a) with fibers applied along them, b) in a certain direction, c) in a direction perpendicular to the fibers, d) the stability of the structure along the fibers, e) in a direction perpendicular to the fibers or f) combined stress.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43574602","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
SMART TRAFFIC SIGNAL CONTROL SYSTEM FOR TWO INTER-DEPENDENT INTERSECTIONS IN AKURE, NIGERIA 尼日利亚akure两个相互依赖的十字路口的智能交通信号控制系统
Journal of Engineering Studies and Research Pub Date : 2022-10-27 DOI: 10.29081/jesr.v28i3.010
Ajibesin Samson, Ponnle Akinlolu, Oyedepo Olugbenga
{"title":"SMART TRAFFIC SIGNAL CONTROL SYSTEM FOR TWO INTER-DEPENDENT INTERSECTIONS IN AKURE, NIGERIA","authors":"Ajibesin Samson, Ponnle Akinlolu, Oyedepo Olugbenga","doi":"10.29081/jesr.v28i3.010","DOIUrl":"https://doi.org/10.29081/jesr.v28i3.010","url":null,"abstract":"The increasing growth in urban population and vehicular volume coupled with inefficient traffic management results in traffic congestion on road networks. In this work, a smart/intelligent traffic signal control system was developed for two inter-dependent intersections in Akure, Nigeria. The system developed in this work uses deep learning and computer vision techniques to estimate the density of traffic and uses this information to adaptively switch traffic signals based on the traffic density estimated. Simulation results show that in 30 minutes of simulation, 32 signal cycles can be achieved and 967 vehicles can move at these two inter-dependent intersections","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46275836","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
TECHNO-ECONOMIC ASSESSMENT OF A 25 MW SOLAR PHOTOVOLTAIC SYSTEM FOR ELECTRICITY GENERATION IN EFFURUN-WARRI, NIGERIA 尼日利亚effurun-warri 25兆瓦太阳能光伏发电系统的技术经济评估
Journal of Engineering Studies and Research Pub Date : 2022-09-01 DOI: 10.29081/jesr.v28i2.008
Mushafau Oshundairo, J. Oyekale
{"title":"TECHNO-ECONOMIC ASSESSMENT OF A 25 MW SOLAR PHOTOVOLTAIC SYSTEM FOR ELECTRICITY GENERATION IN EFFURUN-WARRI, NIGERIA","authors":"Mushafau Oshundairo, J. Oyekale","doi":"10.29081/jesr.v28i2.008","DOIUrl":"https://doi.org/10.29081/jesr.v28i2.008","url":null,"abstract":"This paper was aimed at the techno-economic feasibility assessment of a 25 MW solar photovoltaic (PV) system for electricity generation in Effurun-Warri, Nigeria. The system advisor model (SAM) software was used to design and simulate the solar PV modules for power generation. Furthermore, the standard and validated models inbuilt in the SAM software were employed to analyze the techno-economic performance of the system and the energy losses. Results showed that the extent of energy losses considered in the design of the PV system had significant effects on system performance. For the 25 MW system assessed in this study, the highest monthly energy production was obtained at 3.9 GWh in January and the lowest at 1.9 GWh in July. Also, the total annual energy produced by the PV system was observed to depreciate as the system ages, with about 12% of the initial annual energy production expected to be lost after 25 years of system operation. The obtained capacity factor (12.1 %) and the performance ratio (0.75) revealed that the PV system in its current design would be inadequate to match the energy demand profile of Effurun-Warri, Nigeria. Additionally, the levelized cost of electricity (LCOE) was obtained as 0.65 cents/kWh for the system, which is about 85% higher than the current price of electrical energy in Southern Nigeria. Moreover, a negative net present value (NPV) was obtained for the plant, all indicating that the cost of investment would not be offset during the lifetime of the system, and the project would therefore not be profitable in its current design.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41733482","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
SOFTWARE INTEGRATION TYPE CAD-CAM-CAE IN PRODUCT LIFECYCLE MANAGEMENT 产品生命周期管理中的软件集成式cad-cam-cae
Journal of Engineering Studies and Research Pub Date : 2022-09-01 DOI: 10.29081/jesr.v28i2.006
I. Olaru
{"title":"SOFTWARE INTEGRATION TYPE CAD-CAM-CAE IN PRODUCT LIFECYCLE MANAGEMENT","authors":"I. Olaru","doi":"10.29081/jesr.v28i2.006","DOIUrl":"https://doi.org/10.29081/jesr.v28i2.006","url":null,"abstract":"  \u0000Abstract: Using the CAD-CAM-CAE type programs, case studies can be carried out to analyze some industrial tasks that may occur in the realization, manufacture, and operation of certain industrial components, before they are manufactured and put into operation under normal conditions. operation. Computer programs that perform a virtual modeling and an analysis of them based on the finite element method, help reduce launch and production times, control, and review of industrial products, before making the physical model. All this information resulting from simulations with specialized programs will be analyzed in detail, and the design team within the company can take the right measures to improve the final product.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49035002","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
BUCKLING OF BEAMS WITH A BOUNDARY ELEMENT TECHNIQUE 梁的边界元屈曲
Journal of Engineering Studies and Research Pub Date : 2022-09-01 DOI: 10.29081/jesr.v28i2.003
A. Messaoudi, L. Kiss
{"title":"BUCKLING OF BEAMS WITH A BOUNDARY ELEMENT TECHNIQUE","authors":"A. Messaoudi, L. Kiss","doi":"10.29081/jesr.v28i2.003","DOIUrl":"https://doi.org/10.29081/jesr.v28i2.003","url":null,"abstract":"The present work is devoted to the buckling study of non-homogeneous fixed- fixed beams with intermediate spring support. The stability issue of these beams leads to three-point boundary value problems. If the Green functions of these boundary value problems are known, the differential equations of the stability problems that contain the critical load sought can be turned into eigenvalue problems given by homogeneous Fredholm integral equations. The kernel function of these equations can be calculated from the associated Green functions. The eigenvalue issues can be reduced to algebraic eigenvalue problems, which are subsequently solvable numerically with the use of an efficient algorithm from the boundary element method. Within this article, the critical load findings of these beams are compared to those obtained using commercial finite element software, and the results are in excellent correlation.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48322576","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
SWAMI: A SWARM-INTELLIGENT OPTIMIZATION TECHNIQUE FOR VOLTAGE COLLAPSE MITIGATION Swami:一种用于电压崩溃缓解的群体智能优化技术
Journal of Engineering Studies and Research Pub Date : 2022-09-01 DOI: 10.29081/jesr.v28i2.004
Osegi Emmanuel Ndidi, Wokoma Biobele Alexander, Ojuka Otonye, BRUCE-ALLISON Sa, Chujor Cornelius Chichi
{"title":"SWAMI: A SWARM-INTELLIGENT OPTIMIZATION TECHNIQUE FOR VOLTAGE COLLAPSE MITIGATION","authors":"Osegi Emmanuel Ndidi, Wokoma Biobele Alexander, Ojuka Otonye, BRUCE-ALLISON Sa, Chujor Cornelius Chichi","doi":"10.29081/jesr.v28i2.004","DOIUrl":"https://doi.org/10.29081/jesr.v28i2.004","url":null,"abstract":"In this paper, a voltage collapse optimization system based on comparative studies of swarm-intelligent techniques is proposed for voltage collapse mitigation in power system network. The approach draws inspiration from the idea of utilizing the intelligent behavior of swarm-based artificial machine intelligence technique coined SWAMI for voltage collapse minimization or prevention through dynamic shunt compensation of overloaded power network buses. Several simulation studies have been conducted considering three very popular and successful SWAMI agents – the PSOM, BCOM and ACOM on an IEEE benchmark power network with promising results. Simulation studies showed that the PSOM SWAMI exhibited the most stable response in terms of voltage profile collapse and recovery from voltage collapse state after voltage sensitivity studies. Safe margins of loading and optimal shunt compensations are determined based on the SWAMI techniques.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43559040","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
EFFECTS OF WASTE STEEL FIBRES ON THE MECHANICAL PROPERTIES OF MODIFIED SELF COMPACTING CONCRETE 废钢纤维对改性自密实混凝土力学性能的影响
Journal of Engineering Studies and Research Pub Date : 2022-09-01 DOI: 10.29081/jesr.v28i2.001
A. Adebanjo, Mutiu Abiodun Kareem, Oluwole A. Olawuyi, K. Ishola, Ayomipo Odefemi
{"title":"EFFECTS OF WASTE STEEL FIBRES ON THE MECHANICAL PROPERTIES OF MODIFIED SELF COMPACTING CONCRETE","authors":"A. Adebanjo, Mutiu Abiodun Kareem, Oluwole A. Olawuyi, K. Ishola, Ayomipo Odefemi","doi":"10.29081/jesr.v28i2.001","DOIUrl":"https://doi.org/10.29081/jesr.v28i2.001","url":null,"abstract":"Waste Steel Fibre (WSF) and Rice Husk Ash (RHA) were used in the production of Self Compacting Concrete (SCC). Seven variants of SCC mixes were prepared. The rheological and mechanical properties (Compressive Strength (CS) and Split Tensile Strength (STS)) of the SCC produced were examined. The results showed that the blocking ratio varied marginally while other fresh properties of the SCC with WSF compared favourably to the standard. The CS of the hardened control samples after 56 days of curing was 36.18 N/mm2 while the CS of SCC with 15 % of RHA and 0.0 %-0.5 % of WSF, ranged from 37.04 - 43.64 N/mm2 with the maximum CS at 0.4 % WSF addition. Similarly, the STS of SCC at 56 days improved with an increase in WSF content up to 0.4 % and decreased with further addition of WSF. The inclusion of WSF at the optimum level of     0.4 % addition had a better influence on the tensile strength of SCC thereby increasing the ratio of STS to CS.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47854926","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
NUMERICAL STUDY OF THE EFFECTS OF EVAPORATIVE COOLER SUPPLY AIR OUTLET HEIGHT ON THERMAL COMFORT 蒸发冷却器送风高度对热舒适性影响的数值研究
Journal of Engineering Studies and Research Pub Date : 2022-09-01 DOI: 10.29081/jesr.v28i2.002
I. Haruna, I. Rufai, Balarabe Yahaya
{"title":"NUMERICAL STUDY OF THE EFFECTS OF EVAPORATIVE COOLER SUPPLY AIR OUTLET HEIGHT ON THERMAL COMFORT","authors":"I. Haruna, I. Rufai, Balarabe Yahaya","doi":"10.29081/jesr.v28i2.002","DOIUrl":"https://doi.org/10.29081/jesr.v28i2.002","url":null,"abstract":"Thermal comfort in a space equipped with a direct evaporative cooler is a function of the height of the cooler's supply air outlet. This article attempts to numerically investigate the impact of hybrid downdraft evaporative cooler (HDEC) supply outlet height on occupant thermal comfort in an office building. DesignBuilder CFD parametric simulations was carried out by varying the height of the HDEC supply outlet from 0.1m to 2.4 m, step 0.1 m above ground level, using Predictive Mean Vote (PMV) as an objective function. The results show that the best PMV of -0.27 was obtained at 0.4m above the floor level.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45923448","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 REGARDING THE INFLUENCE OF CORROSIVE AGENTS ON THE SURFACE OF METALLIC MATERIAL LIKE STEEL 腐蚀剂对钢等金属材料表面影响的研究
Journal of Engineering Studies and Research Pub Date : 2022-09-01 DOI: 10.29081/jesr.v28i2.010
Olga Popa, ANDREI-VLAD Ciubotariu, C. Grigoras, A. Rosu, V. Zichil
{"title":"STUDY REGARDING THE INFLUENCE OF CORROSIVE AGENTS ON THE SURFACE OF METALLIC MATERIAL LIKE STEEL","authors":"Olga Popa, ANDREI-VLAD Ciubotariu, C. Grigoras, A. Rosu, V. Zichil","doi":"10.29081/jesr.v28i2.010","DOIUrl":"https://doi.org/10.29081/jesr.v28i2.010","url":null,"abstract":"Corrosion is a process that involves the action of different agents on material surfaces. Corrosive agents in corrosion field can be ambient, saline and microbiological mediums. These agents can influence the mechanical properties of metallic material like steel. The aim of this research is to present the mechanic properties of sheet steel submitted at the action of corrosive agents. The metallic samples were analyzed in order to determinate the resistance at corrosion by stress-strain curves, deformation limit curves and (Atomic Force microscopy) AFM images. Relative results are obtained in the case of saline medium corrosion, meaning that the saline medium corrosion influences the metallic sample, in proportion to the degree of salinity. Also, the AFM images and topographies of metallic surface confirm this conclusion.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48143105","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
GEOPHYSICAL INVESTIGATION OF GROUNDWATER POTENTIALS USING RESISTIVITY METHOD: A CASE STUDY OF ABU PHASE II STUDENTS’ HOSTEL 利用电阻率法进行地下水位的地球物理调查&以阿布扎比大学二期学生宿舍为例
Journal of Engineering Studies and Research Pub Date : 2022-09-01 DOI: 10.29081/jesr.v28i2.005
F. Ogbozige, Sadiq Sani
{"title":"GEOPHYSICAL INVESTIGATION OF GROUNDWATER POTENTIALS USING RESISTIVITY METHOD: A CASE STUDY OF ABU PHASE II STUDENTS’ HOSTEL","authors":"F. Ogbozige, Sadiq Sani","doi":"10.29081/jesr.v28i2.005","DOIUrl":"https://doi.org/10.29081/jesr.v28i2.005","url":null,"abstract":"Geophysical survey for groundwater was conducted in two newly built halls of residence (hostels) named Dangote and Shehu Idris at the second phase of Ahmadu Bello University (ABU), Zaria in Nigeria. The vertical electrical sounding (VES) technique of resistivity method was employed with Schlumberger array in seven VES points distributed within the two hostels. Results showed that 4 to 6 geoelectric layers exist within the study area for a spacing of at most 200 m between current electrodes. The resistivity values of the geoelectric layers in all the VES points ranged from 26.6 Ωm – 30342 Ωm while the thickness and depth ranged from 0.263 m – 40.34 m and 0.572 m – 50.66 m respectively. However, four VES points (two in each hostel) were identified to be suitable for borehole drilling though, three out of these four VES points have single aquifer in each with resistivity and thickness ranging from 34.4 Ωm – 40.57 Ωm and 2.02 m – 7.49 m respectively. Conversely, the fourth VES point has two aquifers positioned at the third and fifth layers with resistivity values ranging from 26.6 Ωm – 51.4 Ωm and thickness ranging from 1.93 m – 18.7 m. It was recommended that among the four VES points (two in each hostel) identified to contain aquifers, priority should be given to the ones with larger thickness in each hostel.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46318542","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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