für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The need to develop and use light weight structural components in the design of aircraft and automotive vehicle has brought increasing application of composite materials. Composites have various kinds of flaws built into them during manufacturing process. Similar looking composites may have quite different properties depending upon their internal features. Reliable performance of the advanced, high strength material in critical applications depends on assuring that each part place in a service satisfies the conditions assumed in design. This research addresses the use of half power bandwidth method to experimentally measure the damping of a carbon fibre/epoxy composite. Additionally the dynamic stiffness was also measured. The effect of moisture, humidity and fibre orientation on dynamic characteristics of composite was investigated to work out the best layup sequence for a structure. ····· 1036188508
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Combustion of hydrocarbon fuel in vortex flow fields is a novel technique to enhance combustion efficiency and fuel economy and to reduce flame length. Vortex combustion is a potential energy conversion technology for miniaturized jet engines and micro gas turbines. The pollutant emission of such combustion technology is considerably lower than other similar technologies. This monograph presents a critical survey of the turbulence modeling approaches of vortex flow. A new turbulence model based on the two-equation eddy viscosity approach is derived and validated to enhance numerical predictions of confined vortex flow. Moreover, this monograph includes a comprehensive computational investigation of vortex flames generated in a novel combustor. Some experimental measurements of pollutant emissions of such vortex combustor are presented and discussed. Several new empirical correlations for predicting vortex decay, NOx concentration and other flow field variables are proposed. This monograph sheds the light on different modeling aspects of reacting vortex flows, which empower efficient simulation of industrial systems utilizing this new technology. ····· 1036188444
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray High pressures, elevated temperatures, complex and intricate section geometries lead to repeated mechanical and thermal stresses in the extrusion die and affiliated tooling. The focus of this monograph is on the following three distinct yet inter-related studies pertaining to the improvement of aluminum extrusion die: failure analysis, surface treatment, and effect of billet quality. The following topics are discussed in detail: investigation of various modes and critical failure types based on industrial data FE simulation for identification of critical process parameters & design features in die fatigue-life analysis of gas nitriding process for H13 steel and investigation of various effects including repeated nitriding, pre-nitriding surface preparation and die profile geometry on the nitriding performance investigation of the effect of billet quality and related influencing extrusion parameters on the die service life regression-based die life models microstructural investigation of different billet samples and FE analysis of extrusion process to observe the influence of smelter (primary) and recycled (secondary) billets on the useful life of extrusion die. ····· 1036188363
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Over recent decades many new composites have been developed, some with very valuable properties. By carefully choosing the reinforcement, the matrix, and the manufacturing process that brings them together, engineers can tailor the properties to meet specific requirements. This collection reflects the current worldwide state of knowledge concerning the latest scientific concepts and technological developments in the characterization, testing, mechanics, modeling, manufacturing and applications of various classes of composite materials and structures. It is also intended to promote the sharing of ideas and emerging technologies among academia, research institutions and the relevant industries. ····· 1036188258
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Most of the energy needs in today s world are dependent on oil and natural gas. With the increasing demand and dwindling resources, drilling deeper wells is in greater need today. Deeper wells require longer drillstrings. The long drillstrings are essentially unstable and cause excessive vibrations. Moreover, deep wells encounter harder rock increasing the severity of vibration. The stability of a drillstring depends upon the dynamics of the drillstring, design of the bit and type of rock. For oil and gas drilling, Polycrystalline Diamond Compact (PDC) bits are used often due to increased rate of penetration. One such PDC bit is a Coring Bit. A Coring Bit produces a core and hence has lesser area of cut to be made. This makes drilling at high penetration rate possible. A special type of coring bit was used at the Hard Rock Drilling Facility (HRDF) at the Sandia National Labs (SNL). The surfaces generated by this bit are used to study the nature of vibration in drillstrings. Observation of the rock surface after the test is an old practice in drillstring research. ····· 1036188231
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray A procedure is described for the calculation of stress intensity factors for surface cracks in a section roll. Load acting on the roll can be determined for individual cases by experimentally measuring the deformation of the roll, this obviates the necessity of relying on theoretical estimates of the roll pressure. The stresses in the uncracked roll are determined using an axis symmetric finite element model. The samples of prematurely failed roll samples collected from steel plant were examined for their content, microstructures, hardness and the retained austenite content. The residual stresses were also measured on the inner as well as the outer surface of the roll. Several suggestions have also been made for smooth operation of the mill and consequently for the extension of life of a work roll. Finite element method has emerged as a powerful tool for finding the numerical solution of a wide range of engineering problems, where closed form of analytical solution is not feasible. Due to the rapid development in computer technology, large number of packages programs has been developed for finite element analysis, which made it possible for wider use of this technique in practice. ····· 1036188085
····· lezzter Preis 44.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Corrosion initiation and growth rate are important properties in maintaining structural integrity, especially for surface and pit corrosion of common infrastructure and transportation metals. In this study, the surface corrosion pit initiation and growth rate on Aluminum 2024(common aerospace alloy) and Steel 304(common alloy for infrastructure) in different pH solutions was measured and values were analyzed by image analysis over a scheduled time. A MATLAB algorithm was developed for detecting the initiation and growth rate of pits as a function of time. The developed algorithm was validated with simulated specimen as well as experiments conducted corrosion specimen. Based on the result of obtained, the MATLAB algorithm predicts the right trends and power law radial xii corrosion pit growth rates and should be useful for corrosion initiation and growth predictions in various metals. ····· 1036188046
····· lezzter Preis 68.00€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray To meet increasing performance demands on materials used for aerospace applications, carbon fiber composites have been increasingly turned to. With the increasing use of carbon fiber composites, also known as carbon fiber reinforced plastics (CFRPs), substantial waste is generating during manufacture as well as at the end of the service life of the composite structure. In order to reclaim the valuable carbon fiber in CFRPs and to avoid landfilling CFRPs carbon fiber recycling techniques have been developed to recover carbon fiber from CFRPs. In this work the systematic evaluation of recycled carbon fiber (RCF) from multiple material sources and multiple recycling processes has been conducted in three phases. Each phase asses the state of the art in carbon fiber recycling. Scanning Electron Microscopy, X-Ray Photoelectron Spectroscopy, and Single Filament Tensile Testing has been used to characterize morphological, surface chemistry, and mechanical properties of recycled carbon fibers. ····· 1036187984
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Currently various collection strategies are implemented in different parts of the world to collect End-of-Life (EOL) products. Since different collectors in the reverse logistics network will influence the performance of a collection strategy, a suitable collection program is required. The objective of this research is to find an optimum collection strategy to suit various environments by considering the costs and the environmental aspects of collection. To design optimum collection strategies, information on the rate of EOL product returns is essential. Therefore, a methodology is proposed to forecast the return of EOL products by considering product life, consumer behaviour and historical sales. This forecast model is then integrated into the collection strategy model. The integrated model is dynamically formulated to present the behaviour of different sets of strategies. Coloured Petri Net (CPN) approach is utilised in the forecasting and modelling of collection strategies. The results indicate that the integrated model will help practitioners in making decisions on implementing a suitable collection strategy for Reverse Logistics. ····· 1036187763
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Mechanics, the science of forces and motions, with its numerous engineering applications has been rendering valuable service to the mankind since the very beginning of our civilization. These applications have been achieved through a proper blending of the principles of mechanics with certain postulates and assumptions based on experiments and experience. The popular name of this is Applied Mechanics and has various branches, viz. Solid mechanics, Fluid mechanics etc. Mechanics of Solids deals with the mechanical behavior of the deformable bodies (bars, plates, cylinder, disc, shell etc.) subjected to various types of external forces and goes by a variety of names, such as strength of materials, mechanics of deformable solids etc. Thermal stresses problems in mechanical engineering has been solved my B.R. Seth`s Theory. Application of these problems are useful in Mechanical Engineering and Structural engineering. ····· 1036187757
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Energy is one of the important crucial input factor in the thermal industries require new combustion concepts for effective utilization of the fuel with controlled emissions.Due to the depletion of fossil fuels at alarming rate and increasing of pollution levels from the various combustion processes such as I.C. Engines, boilers and furnaces, the need arises for the evolution of the new combustion techniques in contrast with the existing combustion techniques. The increased consumption rate and crude oil price leads to the usage of alternate fuels or newer technological development. Furnaces operating below optimum efficiency and emission levels can be improved by new technological approaches by retrofitting in new systems. Oscillating combustion is relatively a simple process. It is accomplished by introducing an oscillating valve on the path of the fuel line. The results of the project had led to a significant savings in fuel consumption, enormous reduction in NOx emissions and highly cost effective which results in revenue savings.This project was implemented in the year December 2008- April,2009 respectively. ····· 1036187638
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In today s competitive manufacturing markets, companies that want to stay in business absolutely must know their customers, develop ideas through sound engineering fundamentals, and rely on computer-based tools such as simulation technology to evaluate and refine designs as quickly and accurately as possible. Manufacturers today do indeed have a wide range of such simulation tools to deploy throughout the product development process. Companies are finding that such tools can be used most effectively to facilitate design innovation if they are blended seamlessly within the product development cycle rather than used alongside the process. Simulation performed as an integral part of this process rather than separately off to the side continuously verifies the design and guides the configuration of the product. Simulation software is based on the process of modeling a real phenomenon with a set of mathematical formulas. It is a program that allows the user to observe an operation through simulation without actually performing that operation. ····· 1036187601
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray An essential book for engineers developing mechatronic systems for robotic surgery. New perspectives on robotic assisted orthopedic surgery are introduced. Recent advances in medical imaging technology have made real-time calibration of robot based on machine vision practical to be used in an orthopedic surgical operation. This book provides basic concept for using visual sensory information on the real-time robotic control and in-process calibration for accurate model of robot link parameters. In distal locking procedure,it is difficult to determine manually the hole s position of intramedullary rod before drilling and screwing to the bone. This book, therefore, explains new approach to determine the hole position and orientation using machine vision. This will significantly reduce surgery time, error and x-ray exposure to patient. Drilling bones will introduce nonlinear profile of thrust forces and torques. Uncontrolled drilling profiles may cause unnecessary surgical invasion. New technique for measuring in process triaxial forces and torques for compensating the trajectory planning errors during the drilling operation is addressed. ····· 1036187486
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This work aims to study the effect of the anisotropy on deep drawing operation using finite element method. A commercially available finite element program code (ANSYS9.0), was used to perform the numerical simulation of the deep drawing operation. 3-D model of cylindrical cup of (44mm) outer diameter, and (0.5mm) thickness, has been developed. Due to the symmetry in the specimen geometry, only one fourth portion of the model needed to be analyzed. Low carbon steel (1008-AISI) was chosen to carry out the majority of the work. Another material was chosen to investigate the influence of the normal anisotropy coefficient was a (304L-AISI) austenitic stainless steel. Both Von Mises isotropic yield criterion and Hill`s 1948 anisotropic yield criterion were used in FEM for prediction of cup wall thickness, strains, stresses distribution, also onset of wrinkling and earing. The numerical results are compared with experimental results. ····· 1036187396
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The current experimental study aims to investigate the effect of magnetic field on internal combustion engines. The study concentrates on engine performance by examining fuel consumption and exhaust emissions. The magnetic field was applied to the fuel supply line of a typical SI engine using unleaded gasoline fuel. Moreover, the magnetic field was generated by electromagnets with a twelve-volts car battery while varying the strength and configuration of the magnetic field. The experiments were conducted at a variety of engine operating conditions by using an engine dynamometer setup. The exhaust gas emissions of CO, NOx, and HC were measured by using an online gas analyzer. The magnetic effect on SFC reduction was only consistently significant at the lowest load of 20 Nm and both speed extremes of 1000 and 3000 rpm using one magnet. The effect on CO was the most significant reduction of all other emissions at most engine s loads and speeds, especially at lowest speed of 1000 rpm using five magnets. The effect on NOx was the most consistent reduction of all others with the most effect using the Spiral configuration at lowest speed of 1000 rpm. ····· 1036187268
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Geometry of the cutting tools is one of the crucial parameters affecting the quality of manufacturing processes. The geometry of the surface generated on the blank is dependent upon the geometry of the cutter. This book outlines in detail geometric models of single-point and multi-point cutting tools and proposes a set of new three-dimensional (3D) standards for defining the tool geometry. The 3D geometric models of cutting tools would help the design, analysis and manufacturing processes of the cutting tools. Relations are developed to map 3D angles to equivalent conventional angles as detailed in ASA, ORS and NRS standards. This set of relations is known as forward mapping. Similarly, the relations to find 3D angles from the given conventional angles, inverse mapping, are also established. The setting or swivel angles for grinding and their relations with 3D rotational angles are developed for single-point cutting tool to generate features for resharpening. To illustrate the utility of 3D definitions of cutting tools, a few case studies on Finite Element based Analysis, CNC machining and geometric assessment of tool wear and defects of different cutting tools are considered. ····· 1036187200
für 58.41€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Aluminum profile is used in various fields such as aeronautics and automobile industries to get light products. As one of main forming process to obtain the profile part, stretch-wrap bending becomes the major development direction of advanced plastic forming technology, so prediction and control of forming defects have become a difficult and key problem urgently to be resolved in research and development of this forming process. However, this is an intricate process affected by many interactive multi-factor effects it is difficult to get ideal solution for process design by using only theoretical analysis and experiment. Therefore numerical simulation based on FEM is used to analyze the forming mechanism, to predict the defects and to optimize the process parameters. The technology of plastic sheet metal forming and its theoretical analysis are globally introduced. On this foundation a study on stretch-wrap bending processes on hollow section profile is conducted to analyze stress and strain distribution under different loadings. The agreement between the experiments and the simulations is fairly good for most cases, which proves the validity of the established numerical model. ····· 1036187170
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray We have developed a finger-shaped sensor array (BioTac) that provides simultaneous information about the contact forces, microvibrations and thermal fluxes induced by contact with external objects. For tasks such as identifying objects or maintaining stable grasp, these sensory modalities tend to be synergistic. For example, information about texture and slip can be derived from vibrations of skin ridges sliding over a surface, but only if the forces on the skin are known and well-controlled. Similarly, information about the material composition of an object can be inferred from the rate of heat transfer from a heated finger to the object, but only if the location and force of contact are similarly well-controlled. The BioTAC sensor is intrinsically simple, robust, and easy to manufacture and repair. The skin possesses texture and tackiness similar to the properties of human skin that facilitate grip and can be easily replaced if worn or damaged. The curved, deformable nature of biological finger tips provides mechanical features that are important for the manipulation of the wide variety of objects encountered naturally. ····· 1036187009
····· lezzter Preis 44.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Natural fibres are promising reinforcement to be used in thermoplastic composites due to their low weight and cost. The major usage of plastic composites is in transportation followed by the combined usage in marine and corrosive environments. However, the stability of wood plastic composite in corrosion and marine environment is not well understood. Manufacturers mostly rely upon some limited laboratory tests whose methodologies are useful for simulations but not for predicting product s service properties. An investigation has been carried out to assess the properties of rubber wood fibre reinforced polypropylene composites and environment stability of these composites has been studied at three different temperatures. ----- Nafish Sarwar Islam. ····· 1036186935
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Mechanisms with multiple topological structures during the operation process are called mechanisms with variable topologies (MVTs), and their corresponding kinematic chains are called variable chains. The kinematic joints whose types and/or motion orientations are changeable during the operation process of an MVT are called variable joints. This work presents a systematic design methodology for MVTs. First, locutions of mechanisms with multiple configurations are introduced. Then, the topological characteristics of variable joints subject to input motions are investigated. A mapping function method is provided to describe the topological characteristics and to determine the relationships of configurations. Moreover, fundamental synthesizing corollaries are established. A sawing mechanism and a mechanical lock are exemplified to analyze their configuration transformations. Finally, a design methodology is proposed for the configuration synthesis of MVTs. A sawing mechanism and mechanical locks are exemplified to verify the feasibility of the design methodology. And, twenty-three new sawing mechanisms, and five new mechanical locks with variable passwords are obtained. ····· 1036186913
für 32.31€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Deep drawing process is an important industrial processes where it has been extensively used. It is a process for converting the blank metal to make cylindrical shape in most of the cases. A research program for performing basic calculations related to the product shape was utilized. Eighteen geometric shapes have been selected for the production in this process. The program is include the general equations for this controlling process for each form. When choosing one of the shapes in the program, the dimensions of the desired product are selected. In other words, the inputs to the program are the required dimensions of the product before reaching the required deportation. In addition, diameter, height and other related dimension are computed which were chosen for each stage throughout the operation. Computer program is aimed to help designers templates deep drawing quickly through the implementation of the process, and this exceeds the designer experience that is required to perform the require calculations. ····· 1036186864
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray THIS STUDY correlates textural and microstructural features of Nimonic C-263 (A nickel-base superalloy) to the in-plane anisotropy in tensile properties, nature of deformation and work hardening behaviour as well as drawability (Limit Drawing Ratio and Forming Limit Diagrams, based on computer modelling using commercial LS-DYNA software) as a function of sheet thickness and aging condition. The book outlines the procedures for the evaluation of MICROSTRUCTURE (Optical, Scanning and Transmission Electron Microscopy), TEXTURE (XRD, Pole Figures and ODFs), MICROHARDNESS-based yield loci, TENSILE DEFORMATION behavior (In-plane Anisotropy in Strengths, Ductility and Work Hardening as well as Deformation Mechanisms), FRACTOGRAPHY and the means of applying these properties to estimate DEEP DRAWABILITY for the construction of honeycomb like structures for HYPERSONIC and RE-ENTRY vehicles. The limit strains of FLDs obtained by the computer simulation are verified by the analytical equations developed using VERTEX THEORY. Essentially, this is an empirical study of relevance to material research, alloy design and industrial processing technologies. ····· 1036186854
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray There is a significant amount of uncertainty in the radiative forcing of black carbon (soot) on the environment. This is primarily due to its indirect effects. Several important pieces of information, with regards to particle surface chemistry, are currently unknown and elucidate a complete quantitative assessment. Its heterogeneous processing in the atmosphere is highly dependent upon the surface chemistry and, thus, plays a key role in properly assessing soot s radiative forcing. Many previous heterogeneous reaction experiments with soot have inherent reactor design flaws (diffusion) and are conducted at atmospherically peripheral conditions. Thus, a novel reactor, particle on substrate stagnation flow reactor, was developed to circumvent these problems. Chemical characterization of soot particles produced and sampled using well-controlled methods addresses other problems in prior studies and aids in further understanding soot formation and growth. ····· 1036186739
für 62.91€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Functional, adaptive, or responsive shell is a thin-walled structure integrated smart materials such as: piezomagnetic, piezoelectric, magnetostrictive, electrostrictive, and a like materials. The smart materials functionality is indeed to provide a new feature to the application of composite structures that considered as a crucial role in construction of spacecraft and aerospace vehicles as well as many of considerable technological applications in vibration control. In fact, the idea of developing an adaptive structure is to create new properties can be utilized in health monitoring or controlling the operational conditions, aside of structure designated load supporting capability. In this book, a fundamental model was derived using Hamilton`s principle and Gibbs free energy functions, casted in a version of a general shell of revolution and intended for a wide range of common smart materials. Extensive examples have been included to assess the internal evenness of the shell model when subjected to fully interactive actions among mechanical, electric, magnetic, and thermal forces. Noteworthy conclusions were also drawn highlighting the merit and demerit of the introduced model. ····· 1036186723· 1 · ::::: · 44 ·· 45 ·· 46 ·· 47 ·· 48 ·· 49 ·· 50 · ::::: · 83 ·
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