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The main aim of this study is to analyze the application of reliability, availability, maintainability and dependability in identification of most sensitive subsystem of evaporation system in sugar plant. For this analysis, transition diagram of all subsystems is drawn and respective Chapman–Kolmogorov differential equations are derived using Markov birth–death process. All failure and repair rates...
This paper investigates the thermal effects of magnetohydrodynamic micropolar fluid with hidden phenomenon of heat and mass transfer via Caputo–Fabrizio fractional derivative. Analytical solutions are obtained for velocity field, mass concentration, microrotation and temperature distribution by implementing Fourier Sine and Laplace transform. The general solutions have been expressed in terms of simple...
Breaking waves are a natural phenomenon that can affect infrastructure located near the coast and cause soil erosion problems as well. For this reason, it has been investigated through experiments and numerical simulations for decades. With the advancement of new numerical approaches such as the moving particle semi-implicit (MPS) method that allows a better modeling of the fragmentation process,...
In this work, failure prediction of corroded pipelines under combined loads of internal pressure and axial compressive force is investigated through the Finite Element Method. The study was carried out using the PIPEFLAW program, which was specially developed to automatically generate and analyze corroded pipelines models. Two configurations of idealized defects in pipeline were investigated: with...
It is well known that thermal insulation is a leading strategy for reducing energy consumption associated with heating or cooling processes in buildings. Nevertheless, building insulation can generate high expenditures so that the selection of an optimum insulation thickness requires a detailed energy simulation as well as an economic analysis. In this way, the present study proposes an innovative...
The current article provides the numerical investigation into an infinite-length circular cylinder placed as an obstacle in the flow of non-Newtonian fluid. To be more specific, a channel of length 2.2 m and height 0.41 m is considered. The Power law fluid model is carried out with Carreau–Bird law as a non-Newtonian fluid model, and both the Power law linear (constant) and parabolic velocity profiles...
The electromagnetic tube compression is a high-speed electromagnetic pulse-forming process. The process can be used for connecting metal tube with other tube and bar, and the traditional forming method can be partially replaced. At present, the development and application of the electromagnetic forming technology are restricted, and the main problems are the control of the forming process, the precise...
This paper aims to propose a novel knowledge tailor-made management method (KTMM) for industrial automation, to assist managers, project leaders and engineers interested on robotization of manufacturing. It looks for integrating the phases of analyzes, prospecting, development, deployment and evaluation of a robotized process. Specifically, this research focuses on the extraction of valuable knowledge,...
As the usage of plastic components has increased in various industries, the methods for fastening have increased rapidly. When the plastic components are fastened by self-tapping screws or bolts, failure occurs because of stripped threads or plastic creep. In these circumstances, threaded metal inserts provide improved joint performance and ability to assemble and disassemble the components without...
The stainless steel-304 is used in various surgical instruments due to its low carbon content and better corrosion resistance. SS-304 is machined using photochemical machining process (PCM) to obtain the components with micro-dimensions. The statistical methods of signal-to-noise (S/N) ratio and the analysis of variance (ANOVA) are applied to investigate effect of concentration of etchant, time of...
Human pleural cavity pressure rises substantially because of Valsalva maneuver during sneezing. However, the deformations in the upper airway respiratory system significantly increase due to flow rate growth in sneezing, and laryngeal fracture can be mentioned as one of the symptoms of this severe deformation during the Valsalva maneuver. Therefore, the accurate study of the distribution of pressure...
The dynamic stability of cylindrical nanoshells subjected to combined static and time-dependent periodic axial forces is studied by employing the two-dimensional nonlocal elasticity theory together with the first-order shear deformation theory of shells. The differential quadrature method as an efficient and accurate numerical technique is applied to discretize the equations of motion under different...
Scarcity of high-cost silica sand, casting defect such as hot tear in hard moulds and casting ejection problem after solidification are the key industrial problems. Sawdust is a by-product of wood working industries, and economic disposal of sawdust in these industries is a growing concern to the wood industries. The present work utilized sawdust as an additive in preparing mould cavity for casting...
The current study deals with the replacement of existing sintered bronze brake pad using hybrid composite brake pads for armour vehicle application. In the present work, fused mullite was added in three different weight percentages which was compensated by synthetic barites. The pads were produced by conventional manufacturing procedure. The physical and mechanical properties were measured as per...
Designing stable and efficient control methods for walking and running of biped robots has been a challenge over the past years. The goal of this paper is to design a finite-time controller to stabilize the running gait of a compliant leg biped robot. The biped model consists of two springy telescopic legs with flat feet. The robot model has five actuators including a torque actuator at the hip joint,...
A novel algorithm for design concept generation using TRIZ inventive principles for resolving multi-parameter contradiction is described in the paper. The LCM algorithm inverts TRIZ contradiction matrix from parameter versus contradiction versus inventive principles form to solution versus parameter versus contradiction form followed by its bifurcation into two complementary matrices. The concept...
A novel load-sensitive dual-speed transmission (LSDT), which can shift self-adaptively according to load, is proposed. It is applicable to a common condition, which is that the actuator of a machine has a long no-load stroke before it encounters load, but when it is loaded, it has to satisfy the demand of big torque. The LSDT consists of a planetary gear train, an overrunning clutch, and a torque...
The present work attempts to determine the optimal engine load, fuel injection pressure (FIP), start of injection timing (SOI) and pilot-main injection intervals (PMII) regarding the performance and emissions of a diesel engine fueled with J20 biodiesel (20 vol% Jatropha curcas biodiesel + 80 vol% 0# diesel). A four-factor and three-level full factorial design and response surface methodology (RSM)...
The forthright intention of this communication is to scrutinize the effect of variable thermal conductivity and thermal radiation on the magnetohydrodynamic tangent hyperbolic fluid in the presence of nanoparticles past a stretching sheet. For heat and mass transport phenomena, the collective stimulus of slip and convective conditions with the internal heating, viscous dissipation and Joule heating...
The steering performance of the distributed drive electric vehicle (DDEV) is an important research topic. Generally, DDEV works under various operating status with high switching frequency, while the conventional stability controller is only suitable for one special operating status. In addition, the lateral force saturation or deficiency always leads to the unstable steering performance. To achieve...
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