Pouyan PressComputational Engineering and Physical Modeling2588-69594320210701Development of Fly Ash-GGBS based Self Compacting Geo-Polymer Concrete with and without Steel Fibres11813061910.22115/cepm.2021.276291.1163ENBoppana NarendraKumarProfessor, Department of Civil Engineering, VNR Vignana Jyothi Institute of Engineering and Technology, Hyderabad, India0000-0001-7876-2273G Vinod KumarPG Student, Department of Civil Engineering, VNR Vignana Jyothi Institute of Engineering and Technology, Hyderabad, IndiaVemula RajeshPG Student, Department of Civil Engineering, VNR Vignana Jyothi Institute of Engineering and Technology, Hyderabad, IndiaJournal Article20210305The present work is focussed on the optimization of mix proportions to satisfy the self-compatibility requirements as per EFNARC [march 2006] guidelines and to assess the mechanical properties of concrete made out from these industrial by-products adding partially with GGBS in cement called self compacting concrete (SCC) and concrete made with (GGBS+Fly ash) named as Self Compacting Geo-polymer Concrete (SCGPC) and concrete made with incorporation of steel fibers for the optimized SCGPC mix named as Self-Compacting Geo-Polymer Fibre Reinforced Concrete (SCGPFRC) mixes were prepared. The fresh properties, as well as the hardened properties, were studied. The physical durability was also studied with the abrasion resistance test. The fresh properties of SCGPC were better than SCC and SCGPFRC. Although there is a slight decrease in strength for SCGPC, when compared to conventional concrete(100% cement) and SCC, but it fulfill the strength requirements by achieving the target strength. With the introduction of fibres to the SCGPC, the flexural strength and split tensile strength of SCGPFRC is significantly increased when compared to SCGPC mixes. It can be inferred that at fiber content of 1.5% (SCGPFRC2) the value of flexural strength and split tensile strength was found to be increased by 15.73% and 40.72% respectively.Pouyan PressComputational Engineering and Physical Modeling2588-69594320210701Numerical Simulation of Stresses Produced on Hydraulic Clutch Discs due to Heat Generated During Operation192813484510.22115/cepm.2021.277513.1164ENJairo AparecidoMartinsDESCH Ltd., Waterloo, Canada0000-0002-1521-8323Ravinder SJanghuDESCH Ltd., Guelph, Canada0000-000206680-4373Estaner ClaroRomãoDepartment of Basic and Environmental Sciences, Engineering School at Lorena, University of São Paulo, Brazil0000-0003-4316-2029Journal Article20210315Modern clutches are a critical component of a machine/equipment because they are designed to transfer and control torque, consequently producing movements, enabling safe operation, and controlling movement when necessary. When a clutch engages it transfers torque and allows a machine to produce mechanical work as a final result. The clutch engagement process generates heat due to the slipping of clutch discs. Although pressure applied on clutch discs generates stresses in the disc material, it was not clear how severe a combination of pressure and heat might raise the stresses. This study aimed to produce a numerical simulation to determine the impact of temperature also torque changes in the clutch discs when it transfers movement. Some static and thermal numerical simulations by Finite Element Analysis (FEA) (linear-elastic analysis) were performed, which considered two scenarios; (1) first with only pressures applied on clutch disc's face; (2) where heat was added to pressures. These mathematical simulations revealed that discs stresses are highly sensitive to thermal variations since for some cases the maximum von Mises stresses exceeded discs material mechanical strength leading it to failure. To overcome this problem it is compulsory to consider heat when designing a clutch and a cooling system for it.Pouyan PressComputational Engineering and Physical Modeling2588-69594320210701Experimental Study of Concrete Using Raw Rice Husk as Partial Replacement of Cement with Natural Fiber (Jute Fiber) as Reinforcing Material294213484710.22115/cepm.2021.280252.1166ENSristi Das GuptaSenior Lecturer, Department of Civil Engineering, Ahsanullah University of Science and Technology, Dhaka- 1208, BangladeshTarikul IslamSenior Lecturer, Department of Civil Engineering, Ahsanullah University of Science and Technology, Dhaka- 1208, BangladeshMd. Ariful IslamSohagSenior Lecturer, Department of Civil Engineering, Ahsanullah University of Science and Technology, Dhaka- 1208, BangladeshSirajus SalakinSenior Lecturer, Department of Civil Engineering, Ahsanullah University of Science and Technology, Dhaka- 1208, BangladeshIbrahim HossainSenior Lecturer, Department of Civil Engineering, Ahsanullah University of Science and Technology, Dhaka- 1208, BangladeshJournal Article20210410The release of GHG, radioactive metals and other chemicals is detrimental to the environmental impact of cement manufacturing. The use of natural pozzolan (raw rice husk) as a partial substitute of cement in concrete may not only serve to increase compressive strength but also be environmentally sustainable. This paper manages the idea of utilizing Rice Husk as a partial substitution of cement and non-metallic natural fibers (Jute fiber) in concrete to develop an FRC material to study the possible improvement in the 28-day strength and also to reduce the plastic shrinkage crack. Different compositions of 13mm jute fiber (0.1%, 0.2%, and 0.3%) and Rice Husk (5%, 10%, and 15%) were added to concrete with a water-cement ratio of 0.38 in this study. It depicts that the compressive strength improves by up to 2.03% relative to plain concrete after using both jute fibers and rice husk. Further addition of fiber and rice husk prompts a diminishing pattern in strength as the two substances increased, the compressive strength gets diminished, causing low workability of concrete. Moreover, Shrinkage tests were performed to assess the existence of shrinkage cracks; it indicates that when applying jute fiber, the shrinkage crack region decreases. The optimum content of jute fiber is 0.2% (13mm) and rice husk is 10% for the maximum increment of compressive strength. However, the incorporation of 0.3% jute fibers with 13 mm length was found to be very effective in suppressing shrinkage cracks to near zeroPouyan PressComputational Engineering and Physical Modeling2588-69594320210701Optimization of Reduced Beam Sections (RBS) for Ductile Detailing of Seismic Joint Connections Using Finite Element Analysis (FEA)435413484610.22115/cepm.2021.273581.1153ENJeffrey PCimagalaDepartment of Civil Engineering, College of Engineering and Architecture, University of the Cordilleras, Baguio City, Philippines0000-0003-0841-9706Journal Article20210216Steel structures used as Special Moment Resisting Frames (SMRF) designed to resist lateral loads (due to wind and seismic) are expected to undergo large inelastic deformations, hence the ductility requirements are explicitly stated in almost all standards. In any given frame, inelastic deformations should occur in the horizontal elements (e.g. beams) in the form of plastic hinges. Most structural analysis can be performed assuming the beam-column joint (nodes) as a fixed (rigid) connection, however, this may mean that hinging may occur at the connection and thus possibly affect the column through the flange or web connection. In order to ensure a ductile system can be achieved, special detailing requirements are necessary. Among the available methods require the use of Reduced Beam Sections (RBS) adjacent to the beam-column connection to warrant the strong-column/weak-beam design philosophy. The main objective of this paper is to optimize the geometry of the RBS using Finite Element Analysis (FEA) in conjunction with the available standards e.g. BS EN 1998-3 and ANSI/AISC 358-16. While standard codes of practice provide the range of values that can be used in determining the geometry of the RBS, it would be beneficial for a designer to come up with basic rules-of-thumb that can be applied in actual design calculations.Pouyan PressComputational Engineering and Physical Modeling2588-69594320210701Numerical Analysis of Flow and Heat Transfer Characteristics between Two Parallel Plates with Constriction(s)556913487710.22115/cepm.2021.281818.1167ENIshtier RahmanDepartment of Mechanical Engineering, Military Institute of Science and Technology, Dhaka, BangladeshMohammad Ahnaf ShahriarDepartment of Mechanical Engineering, Military Institute of Science and Technology, Dhaka, BangladeshSazedur RahmanDepartment of Mechanical Engineering, Military Institute of Science and Technology, Dhaka, BangladeshJournal Article20210418<em>A numerical study involving graphical analysis has been carried out to investigate fluid flow and heat transfer between two stationary horizontal plates possessing blocks (which restricts flow). Important parameters corresponding to pressure, velocity, temperature, heat transfer coefficient and Nusselt Number have been under the spotlight. Multiple investigations have been undertaken to observe the flow and heat transfer characteristics not only by altering the size of blocks but also by changing the number of blocks. As the blocks reduce the area of flow, following the Continuity equation, reduction of flow area increases the flow velocity and makes the flow turbulent. And the rise of fluid velocity lowers the pressure according to Bernoulli’s principle. Moreover, the presence of blocks creates recirculation of fluid which increases the available time for heat gaining while heat flux is being applied. Blocks contribute to the increase in temperature of the fluid. The higher velocity of fluid causes higher collision among fluid particles. Thus, the heat transfer coefficient and Nusselt Number increase</em>.Pouyan PressComputational Engineering and Physical Modeling2588-695943202107013D Semi-Analytical Solutions for Functionally Grade Power Law Varied Laminate Subjected to Thermo-Mechanical Loading709814063610.22115/cepm.2021.265578.1148ENSharawari PrafullaKulkarniResearch Scholar, Structural Engineering Department, Veermata Jijabai Technological Institute, Matunga, Mumbai 400 019, India0000-0002-2626-6400Sandeep ShivramPendhariAssociate Professor, Structural Engineering Department, Veermata Jijabai Technological Institute, Matunga, Mumbai 400 019, India0000-0001-9492-5474Journal Article20210103This paper describes formulation for calculation of actual through thickness temperature variation followed by stress and displacement analysis of all-around simply supported functionally graded (FG) laminate using a semi-analytical approach. This approach has depended on a two-point boundary value problem (BVP) governed by first-order ordinary differential equations (ODEs). Developed formulation carries the advantage of both elasticity solution as well as ESL or approximate theories. This new model capable of providing accurate results without any approximation along the thickness of FG laminate. Material properties like heat conductivity, modulus of elasticity and thermal expansion coefficient are considered to be varied by a power law. The numerical investigation has been performed to examine thermal loading response on the FGM laminate and transverse loading applied on the laminate's top surface. The results are obtained for two types of thermal loading, obtained by heat conduction formulation received by developed semi-analytical approach and another with assumed power law variation and compared with each other. Leads outcomes from parametric studies, which will be helpful for further research in this area.