iosr-JMCE   Volume-15 ~ Issue-5 ~ Sep-Oct 2018

Abstract: In order to meet the requirements of high-speed machining of continuous small line segments, the mid-point constraint algorithm is proposed based on the kinematic smoothing algorithm based on jounce constrained acceleration for the overlap of corner transition contours caused by the short distance between adjacent corners. By limiting the length of the corner transition section to avoid the occurrence of contour overlap, the optimal corner transfer speed is solved under the premise of fully utilizing the performance of the driver, and the corner smooth transition is realized. By comparing and analyzing the traditional point-to-point interpolation algorithm, the processing time of the proposed algorithm is reduced by 6.8%, the processing efficiency is obviously improved, and the acceleration curve satisfies G1 continuous.

Keywords -High-speed machining；Jounce；corner smooth

[1]. Choi Y K, Banerjee A. Tool path generation and tolerance analysis for free-form surfaces[J]. International Journal of machine Tools and manufacture, 2007, 47(3): 689-696.
[2]. Lei W T, Sung M P, Lin L Y, et al. Fast real-time NURBS path interpolation for CNC machine tools[J]. International Journal of Machine Tools & Manufacture, 2007, 47(10):1530-1541.
[3]. Heng M, Erkorkmaz K. Design of a NURBS interpolator with minimal feed fluctuation and continuous feed modulation capability[J]. International Journal of Machine Tools & Manufacture, 2010, 50(3):281-293.
[4]. Nozawa R, Kawamura H, Sasaki T. Acceleration/deceleration circuit: U.S. Patent 4,554,497[P]. 1985-11-19.
[5]. Tulsyan S, Altintas Y. Local toolpath smoothing for five-axis machine tools[J]. International Journal of Machine Tools and Manufacture, 2015, 96: 15-26...

Abstract: Construction projects globally is considered to be multifaceted in nature. This complex work involves estimates of labor production rates during the planning as well as in the execution phase of the project. These estimates are habitually carried out by experienced personnel based on his/her experience, may sometimes not have the means to discern the controlling factor factors affecting the production rates. There various trends in the soft computing techniques for identification of labor production rate in construction, and one being associated with Artificial Neural Networks (ANN). The current study emphasises on critical literature review on factors likely to affect the productivity rates for concreting activities like reinforcement installation, formwork installation and concreting placement and also some of the other industrial activities.

Key Words: Artificial Neural Networks (ANN), Back Propagation and LaborProductivity

[1]. P. Jason and A. Simaan, "Neural Network Model for Estimating Construction Productivity," Journal of Construction Engineering and Management,ASCE, vol. 123, no. 4, pp. 399-410, 1997.
[2]. S. Yogesh and B. &. O. S. Pradeep Kumar, "A Review of Studies on Machine Learning Techniques," International Journal of Computer Science and Security, vol. 1, no. 1, pp. 70-84, 2007.
[3]. S. Dikmen and S. Murat, "An Artificial Neural Network Model for the Estimation of Formwork Labour," Journal of Civil Engineering and Management, Taylor and Francis, vol. 17, no. 3, pp. 340-347, 2011.
[4]. H. Simon, Neural Networks A Comprehensive Foundation, Second ed., Delhi: Pearson Education (Singapore) Pte. Ltd, Indian Branch,482 F.I.E Patparganj, 2001.
[5]. S. Daniel, K. Vladimir and P. JiE, "Introduction of Multi-Layer Feed-Forward Neural Network," Chemometrics and Intellegent Laboratory Sysytems, Elsevier, vol. 39, no. 1, pp. 43-62, 1997.

Abstract: The conventional moment distribution method is revitalized with a new approach which requires only one-cycle of balance and carry-over and no iteration. For a continuous beam, the method begins by assuming the value of the balancing moment, say x, at the first joint. By invoking the moment equilibrium condition successively from the first towards the last joints, balancing and carry-over moments at other joints can be determined in terms of the single unknown x without iteration. By means of moment equilibrium of the last joint, the only unknown.............

Keywords -One-step moment distribution, plane frames

[1] H. Cross, Analysis of continuous frames by distributing fixed-end moments, Transactions of the American Society of Civil Engineers, 96, 1932, 1-10.

[2] M.J. Creed, Moment distribution in a modern curriculum, The Structural Engineer, The Institute of Structural Engineers, 69( 3), 1991, 48-52.

[3] Technical Guidance Note, Moment distribution, The Structural Engineer, The Institute of Structural Engineers, 90(9), 2012,34-36. [4] P.R. Patil, M.D. Pidurkar, and R.H. Mohankar, Comparative study of end moments regarding application of rotation contribution method (Kani‟s method) & moment distribution method for the analysis of portal frame, IOSR Journal of Mechanical and Civil Engineering, 7(1), 2013, 20-25.

[5] C.C. Yu, Method of Synthetic Distribution, Bulletin of the College of Engineering, National Taiwan University, No.2, 1957, 1-25, Taiwan. (In Chinese)

Abstract: Water, food, energy and the environment have got intertwined in a spiral of decline and degradation .The challenge is to slow the spin and reverse the direction. The world's thirst for water is likely to become one of the most pressing issues of the 21st century. Rapid pace of industrialization, concurrent growth of urbanization, need and change of life style of ever expanding population have the potential to damage the environment and degrade the available surface water sources. Since there has been growing concern about pollution in Talcher area due to industrial, mining and other anthropogenic activities, Central Pollution Control Board and Ministry of Environment.........

Keywords -Intertwined, Physico-chemical parameters, DO, BOD, COD, TDS, TSS, Hotspots, Effluents, Tolerance limits.

[1]. Nayak, C.A. and Dash M.C. 2000. Environmental status of Talcher area, OSPCB, Bhubaneswar.

[2]. Panda, R.B. 1990. A study of water pollution in the River Brahmani at Rourkela Industrial Complex, Sambalpur University, Ph.D. Thesis.

[3]. Panda, R.B. etal 1991. Characterization of Brahmani River water. Indian Journal of Environmental Health. 33 (2): 252-256.

[4]. Panda, R.B. et al 1991. Investigation of water quality of Brahmani River. Indian Journal of Environmental Health. 33 (1): 45-50.

[5]. Washington D.C. 1985. Standard Methods for Examination of Water and Waste Water, 14th Edn. APHA

Abstract: The geophysical method which dominant by geophysicists become one of most popular method applied by engineers in civil engineering fields. Electrical Resistivity Method (ERM) is one of geophysical tool that offer very attractive technique for subsurface profile characterization in larger area. Applicable alternative technique in groundwater exploration such as ERM which complement with existing conventional method may produce comprehensive and convincing output thus effective in terms of cost, time, data coverage and sustainable. ERM has been applied by various applications in groundwater exploration. Over the years, conventional method such as excavation...........

Keywords -Electrical Resistively, Aluminium Rods, Geotechnical Properties Etc.

[1]. FREDLUND D G, RAHARDJO H. Soil Mechanics for Unsaturated Soils [M]. CHEN Zhong-yi translation. Beijing: China Architectural Press, 1997.
[2]. MIAO Lin-chang, Yan Ming-liang, Cui Ying. Studies on electrical resistivity of remold expansive soils [J]. Chinese Journal of Geotechnical Engineering, 2007, 29(9): 1413- 1417.
[3]. ARCHIE G E. The electric resistivity log as aid in determining some reservoir characteristics [J]. Transaction, American Institute of Mining, Metallurgical and Petroleum Engineers, 1942, 146：54-61.
[4]. KELLER G, FRISCHKNECHT F. Electrical Methods in Geophysical Prospecting [M]. New York: Pergamom Press, 1966.
[5]. RHOADES J D, SCHILFGAARDE J V. An Electrical Conductivity Probe for Determining Soil Salinity [J]. Journal of Soil Science Society of America, 1976, 40:647- 6501

Abstract: In this investigation the buckling behavior of single-layered functionally graded nanoplates with uneven porosities exposed to hygrothermal loads is modeled for the first time. Using the Eringen's nonlocal elasticity theory with one scale parameters, the small size effect on the buckling behaviour of the functionally graded nanoplates is considered. Based on the new first order shear deformation theory the equations of equilibrium are obtained from the principle of minimum potential energy. Also, elastic Pasternak foundation is
adopted to capture the foundation influence on the critical buckling load. The equations of equilibrium are solved for various boundary conditions using Galerkin's method. The impacts of nonlocal parameter, porosity distribution and boundary conditions on the critical buckling load are demonstrated.

Keywords Buckling, FG nanoplates, Galerkin's method, Nonlocal elasticity theory, Porosities

[1]. Eringen, AC. and Edelen DGB.,On nonlocal elasticity, International Journal of Engineering Science, 10, 1972, 233-248.
[2]. Eringen AC., On differential equations of nonlocal elasticity and solutions of screw dislocation and surface waves, Journal of Applied Physics, 54, 1983, 4703-4710.
[3]. Daneshmehr, A., et al., Stability of size dependent functionally graded nanoplates based on nonlocal elasticity and higher order plate theories and different boundary conditions, International Journal of Engineering Science, 82, 2014, 84-100.
[4]. Sobhy, M., A comprehensive study on FGM nanoplates embedded in an elastic medium, Composite Structures, 134, 2015, 966-980.
[5]. Ansari, R., et al., Nonlocal three-dimensional theory of elasticity with aplication to free vibration of functionally graded nanoplates on elastic foundations, Physica E, 76, 2015, 70-81

Abstract: A research about the application of winglets at the tip of a rotor blade of a high pressure turbine from the CFM56 engine applying computational fluid dynamics was made. Two geometries were analyzed, the first one applying a winglet at the leading edge and the suction surface, the other one with the winglet at the leading edge and the pressure surface. The results were compared with the ones obtained from the analysis of the original blade configuration, proving that by using winglets at the blade tip, the efficiency increases.

Keywords -Blades, high pressure turbine, stage efficiency, winglets

[1] T.C. Booth, P.R. Dodge, H.K. Hepworth, Rotor-Tip Leakage: Part 1. Basic Methodology, ASME, 81-GT-71, 1981.
[2] N.W. Harvey, K. Ramsden, A computational study of a novel turbine rotor partial shroud, Journal of Turbomachinery, 123, 2001, 534-543.
[3] M. Papa, R.J. Goldstein, F. Gori, Effects of geometry and tip clearance on the mass/heat transfer from a large-scale gas turbine blade, ASME, Journal of Turbomachinery 125, 2003, 90-96.
[4] J.H. Cheon, S.W. Lee, Tip leakage aerodynamics over the cavity squealer tip equipped with coverage winglets in a turbine cascade, International Journal of Heat and Fluid Flow, 56, 2015, 60-70.
[5] A.K. Patel, Research on high work axial gas generator turbine, SAE, 800618, 1980.

Abstract: An experiment was conducted in the 4th week of May 2018, for drying of resin coated marble at Udaipur climatic conditions (Latitude: 24.590N, Longitude: 73.730E, Mean Sea Level: 598m) in Southern Rajasthan, India. Three different shapes of solar greenhouse dryers (Insulated North Wall Type, Raised Arch Type and Solar Tunnel Type) with 200 micron polyethylene sheet were taken for thermal modelling using software solidworks 2018. The thermal models were developed for each greenhouse dryer. Each model so developed was evaluated and validated experimentally. Out of the said greenhouses, the solar tunnel type greenhouse dryer was selected which fulfils thermal need of the resin coated marble, of raising the temperature above 450C but below 600C. Evaluated on.......

Keywords -resin coated marble, insulated north wall type, raised arch type, solar tunnel type, solar greenhouse dryers, thermal modelling, ambient temperature, simulated temperature, and solidworks 2018.

[1]. Aghbashlo, M., Muller, J., Mobli, H., Madadlou, A. and Shahim, R. (2015). Modeling and simulation of Deep-Bed Solar Greenhouse Drying of Chamomile Flowers. Journal of Drying Technology, 33, 648-695.
[2]. Chauhan, P.S., Kumar, A., and Tekasakul, P. (2015). Applications of software in solar drying systems: A review. Journal of Renewable and Sustainable Energy Reviews, 51, 1326-1337.
[3]. Kokate, D.H, Kale, D.M., Korpale, V.S., Shinde, Y.H., Panse, S.V., Deshmukh, S.P., and Pandit, A.B (2017). Energy Conservation Through Solar Energy Assisted Dryer For Plastic Processing Industry. Journal of Energy Procedia, 54, 376-388.
[4]. Kumar, A., Deep, H., and Ekechukwu, O.V. (2017). Advancement in Greenhouse Drying System. Journal of Solar Drying Technology, Green Energy and Technology, 10, 3833-45.
[5]. Prakash, O., and Laguri, V., and Pandey, A., and Kumar, A. (2016). Review on Various Modelling Techniques for the Solar Dryers. Journal Renewable and Sustainable Energy Review, 62, 396-417.

Abstract: The use of Portland cement in concrete construction is under critical review due to high amount of carbon dioxide gas released to the atmosphere during the production of cement. In recent years, attempts to increase the utilization of fly ash to partially replace the use of Portland cement in concrete are gathering momentum. Most of this by-product material is currently dumped in landfills, creating a threat to the environment. Geo-polymer concrete is a 'new' material that does not need the presence of Portland cement as a binder. Instead, the source of materials such as fly ash and ggbfs that are rich in Silicon (Si) and Aluminium (Al), are activated by alkaline liquids.........

Keywords -Alkaline solution, Geo-polymer, GGBSF, Fly ash, NaoH, Na2Sio3

[1]. Shankar H. Sanni, R. B. Khadiranaikar (Bagalkot – 587102, India,, 2013). IJRET: International Journal of Research in Engineering and Technology eISSN:2319-1163 | pISSN: 2321-7308
[2]. Hardjito, D., Wallah, S.E., Sumajouw, DMJ and Rangan, B.V., 'Factors influencing the compressive strength of fly ash based geopolymer concrete', Civil Engineering Dimension SIPIL, 6(2), 2004, pp. 88-93.
[3]. Hardjito, D., Wallah, S.E., Sumajouw, DMJ and Rangan, B.V., 'On the development of fly ash based geopolymer concrete', ACI Materials Journal, 101(52), 2004, pp. 467-472.
[4]. Shetty, M. S., 'Concrete Technology', Fifth Revised Edition, S. Chand and Company Ltd., New Delhi, 2002
[5]. IS 10262. Code for concrete mix Design..

Abstract: Marine structures are adversely affected by corrosion of rebars. In order to assess the structural health, prediction of the amount of mass loss of rebars is important. In this context, an experimental investigation was done to find a relationship between crack width and level of corrosion. An impressed current technique was employed to accelerate the corrosion process. The crack width was measured by image analysis. In this research, a linear relationship was found between the crack width and mass loss. 32 mg/cm2 corrosion level was found to be needed for the appearance of surface cracking.

Keywords -Corrosion of rebar, impressed current technique, crack width, level of corrosion.

[1]. El Maaddawy, T. A. & Soudki, K. A. Effectiveness of Impressed Current Technique to Simulate Corrosion of Steel Reinforcement in Concrete. J. Mater. Civ. Eng.15, 41–47 (2003).
[2]. Shakib, S. & Zakirmorshed, A. Initiation and Propagation of Crack Due to Corrosion of Reinforcement - An Experimental Investigation. 15, 12–16 (2018).
[3]. Al-Sulaimani, G. J., Kaleemullah, M., Basunbul, I. A. & Rasheeduzzafar. Influence of Corrosion and Cracking on Bond Behavior and Strength of Reinforced Concrete Members. ACI Struct. J.87, 220–231 (1990).
[4]. S, L. H., F, T. & T, N. Effects of rebar corrosion on the structural performance of singly reinforced beams. Durab Build Mater Compon 7 Vol 1 571–580 (1996).
[5]. Almusallam, A. A., Al-Gahtani, A. S., Aziz, A. R. & Rasheeduzzafar. Effect of reinforcement corrosion on bond strength. Constr. Build. Mater.10, 123–129 (1996)..

Abstract: This paper presents an experimental and numerical study to evaluate the effectiveness and feasibility of using ferrocement as external overlays for strengthening R.C. slab with a central opening. Twelve R.C slabs of dimension 1000 x 800 x 100 mm were cast and tested experimentally, ten of the specimens were strengthened by ferrocement laminates and the other two were kept as control specimens; with and without opening. The effects of mortar thickness, number, and type of steel wire mesh, ferrocement mortar strength, and strengthening schemes were investigated. A 3-D finite element model using ANSYS package was developed and compared with the available experimental test results to check the validity of the model. A total of 32 numerical models were analyzed to study the different parameters.........

Keywords -Ferrocement, R.C. Slab, Opening, Strengthening, ANSYS

[1] ACI Committee 549-1R-199, "Guide for Design Construction and Repair of Ferrocement", ACI 549-1R-93, Manual of Concrete Practice, Detroit, 1993
[2] ACI Committee 549, "State of the Art Report on Ferrocement", ACI 549–R97, in Manual of Concrete Practice, ACI, Detroit, 1997
[3] Smith S.T., Kim S.J., "Strengthening of one-way spanning RC slabs with cutouts using FRP composites", Construction and Building Materials, 2009; 23, 1578–1590.
[4] Anil Z., Kaya N., Arslan O., "Strengthening of one way RC slab with opening using CFRP strips", Construction and Building Materials, 2013; 48, 883–893.
[5] Afefy H.M., Fawzy T.M., "Strengthening of RC one-way slabs including cut-out using different techniques", Engineering Structures, 2013; 57, 23–336...