modeling and simulation for mems
an introduction to network modeling and simulation for the practicing engineer
Ngày tải lên :
02/04/2014, 15:49
... Introduction 1.1 Advantages and Disadvantages of Modeling and Simulation 1.2 Comparison of “Homebrew” Models and Simulation Tools 1.3 Common Pitfalls of Modeling and Simulation and Rules of Thumb 1.4 ... OF MODELING AND SIMULATION AND RULES OF THUMB tools/environments so that it can be integrated with and leverage existing simulation libraries 1.3 COMMON PITFALLS OF MODELING AND SIMULATION AND ... important for the simulation designer to his or her homework and construct the best COMMON PITFALLS OF MODELING AND SIMULATION AND RULES OF THUMB 15 educated guess when formulating mobility models for...
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Modeling and Simulation for Material Selection and Mechanical Design Part 18 pptx
Ngày tải lên :
10/08/2014, 12:21
... Meier and Mr T Riehl for performing and evaluating a large number of investigations and testings, Mr W Thomala for valuable discussions, Dr G E Totten, Dr K Funatani, Dr L Xie, and Mr R Johnson for ... Organization for Standardization: ISO 4757: Cross recesses for screws www.iso.ch International Organization for Standardization: ISO 4759: Tolerances for fasteners www.iso.ch International Organization for ... Schwabach for support with photographs and experimental results and finally my family for support with plenty of time during preparing the manuscript REFERENCES Askeland, D.R The Science and Engineering...
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Modeling and Simulation for Material Selection and Mechanical Design Part 1 ppsx
Ngày tải lên :
10/08/2014, 12:21
... Understanding Gear Noise, J Derek Smith 18 Chains for Power Transmission and Material Handling: Design and Applications Handbook,American Chain Association 19 Corrosion and Corrosion Protection Handbook, ... Fundamentals and Testing: Second Edition, Revised and Expanded, Raymond G Bayer Engineering Design for Wear: Second Edition, Revised and Expanded, Raymond G Bayer Clutches and Brakes: Design and Selection, ... numerical modeling and simulation technology, coupling of temperature, inelastic behavior and phase transformation and solidification involved with elastic-plastic, viscoplastic and creep deformation...
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Modeling and Simulation for Material Selection and Mechanical Design Part 3 ppt
Ngày tải lên :
10/08/2014, 12:21
... noted that these models should be widely used for off-line simulation of designing steel compositions and processing condition and on-line simulation for guaranteeing mechanical properties of steels ... very useful for designing cooling facilities and determining cooling conditions for obtaining a more uniform quality product VIII CONCLUSION In this chapter, mathematical models for predicting ... mechanisms for substitial and interstitial impurities are different The reason for this is that the adsorption centers on interface are different for these two kinds of impurities Therefore, the...
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Modeling and Simulation for Material Selection and Mechanical Design Part 4 pot
Ngày tải lên :
10/08/2014, 12:21
... constant; W0 and W00 are the mixing energies in solid and liquid states; Xs and Xl are the impurity concentration in solid and liquid phases at the temperature T Solving these equations for the phase ... Guttman has expanded the concept for synergistic co-segregation of alloying elements and harmful impurities at the grain boundaries His theory is very important for analysis of steels and alloys ... where F ¼ for grain boundaries and F ¼ for free surface The kinetics of segregation dissolution could be described by these equations (22) and (23) But, in this case, the variables Xb(0) and Xb...
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Modeling and Simulation for Material Selection and Mechanical Design Part 5 pdf
Ngày tải lên :
10/08/2014, 12:21
... stresses and micro-residual stresses [1,2] The macro-type depends on the plastic deformation of solid materials due to rapid non-uniform cooling And, the strain and deformation due to phase transformation ... designing for metallurgical process In this chapter, the metallo-thermo-mechanical theory, numerical modeling and simulation technology considered with coupling of temperature and phase transformation ... well as forging for the control of residual stress and distortion in these processing This chapter not only presents various simulation methods and results of the residual stress, distortion and...
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Modeling and Simulation for Material Selection and Mechanical Design Part 6 pot
Ngày tải lên :
10/08/2014, 12:21
... elastic–viscoplastic solids and viscous fluids to apply simulation of the casting process was proposed and verified by experimental and numerical results On the other hand, a proposal based on the ... Therefore, the problem then is to find this steady solidification profile and the distribution of temperature and fluid velocities in both the liquid phase and the solid phase On the other hand, ... is mm, and two casting speeds are used Vc ¼ 400 and 600 mm=sec Calculated Results Simulated results of steady temperature field both in the strip and roll is shown in Fig 44(a) and (b) for the...
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Modeling and Simulation for Material Selection and Mechanical Design Part 7 pot
Ngày tải lên :
10/08/2014, 12:21
... 375–381 Ju, D.Y.; Inoue, T In Simulation of Solidification and Thermo-mechanical Behavior in Continuous Casting Process, Modeling and Simulation in Metallurgical Engineering and Materials Science; Yu, ... Conference on Physical and Numerical Simulation of Materials and Hot Working (ICPNS’99), 1999; 270–280 Copyright 2004 by Marcel Dekker, Inc All Rights Reserved 4 Modeling and Simulation of Mechanical ... ð1Þ If the deformation is uniformly distributed along the bar and volume constancy can be assumed, the true and the conventional stresses and strains are related by s ¼ Sð1 þ eÞ and e ¼ lnð1...
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Modeling and Simulation for Material Selection and Mechanical Design Part 8 pps
Ngày tải lên :
10/08/2014, 12:21
... activation volume For given stress and strain, the value of T lnð_ à =_ Þ is constant for all e e _ temperatures and also for all strain rate values between e0 exp½ÀDG0 = _ ðkTÞ and e0 This means ... shear wave velocity cT and s ¼ avn = À ðv=cT Þ2 Athermal Deformation Processes In the range of intermediate temperatures and low strain rates (combined ranges B and I), and at relatively low ... previous temperature rise and k is the fraction of energy remaining in the deformation zone At low strain rate, there is enough time for heat transfers out of the deformation zone and the temperature...
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Modeling and Simulation for Material Selection and Mechanical Design Part 9 pptx
Ngày tải lên :
10/08/2014, 12:21
... two points of each fiber, and a kink band is observed, which is inclined to the load direction [59–59] Within the kink band, the matrix suffers high cyclic shear deformation, which may cause ... deformed The harder material appears in the mean brighter than the softer one Fourteen cycles later, the mesh and the stress distribution look completely different, as shown in Fig 24c and d for ... is the initiation of an inclined shear band accompanied by a reduction in the specimen deformation resistance, deformation localization in the matrix, and hence a reduction in the fatigue life...
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Modeling and Simulation for Material Selection and Mechanical Design Part 10 potx
Ngày tải lên :
10/08/2014, 12:21
... determined in experiments and by the finite-element simulation With these results, the main reason for crack initiation and growth seems to be the relatively high local strains, and not the local stress, ... tensile forces are needed for the continuation of extension Other specimen regions undergo additional deformation, so that the uniform elongation increases with increasing strain rate sensitivity and ... strain for nucleation, and sN is the corresponding standard deviation B Influence of Strain Hardening and Strain Rate Sensitivity In an early study on the growth of cavities by plastic deformation...
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Modeling and Simulation for Material Selection and Mechanical Design Part 11 doc
Ngày tải lên :
10/08/2014, 12:21
... common tool materials, and shows how they can be understood and exploited for alloys such as high-speed tool steels (HSS), cemented carbides, and cermets A deep level of understanding of the complex ... containing Fe will react with oxygen and carbon at the tool surface and form a boundary layer of both iron carbides and oxides This leads to a built-up edge The formation of a built-up layer can ... Meyer, L.W., Eds.; DGM-Informations-Gesellschaft Oberursel: Germany, 1988 36 Cho, K.M.; Lee, S.; Nutt, R.; Duffy, J Adiabatic shear band formation during dynamic torsional deformation of an HY-100...
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Modeling and Simulation for Material Selection and Mechanical Design Part 12 docx
Ngày tải lên :
10/08/2014, 12:21
... phase transformation differs significantly from that found on heating a TiC standard up to 823 K for 30 Figure 14(b) and (c) presents electron energy loss spectra from the wear crater after and 30 ... method were compared to TiC and TiO2 standards Fig 10 presents the Fourier transform of data obtained on analyzing the extended electron energy loss fine structure (EXELFS) for titanium carbide (TiC) ... carbon For this reason, when the 3d Ti- and 2p X orbitals are hybridized, the contribution of the ds-electrons of Ti is less pronounced in the oxide and more expressed in the nitride and carbide...
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Modeling and Simulation for Material Selection and Mechanical Design Part 13 pptx
Ngày tải lên :
10/08/2014, 12:21
... the chip), and by promoting the selforganization of the tool This is done in two ways: (1) by surface engineered and self-lubricated coatings for low and moderate speed machining, and (2) by ... coating, and an anti-frictional sublayer form the basis for future ‘‘smart’’ coatings SuperHard (nano-composite=superlattice) and Self-Protecting Coatings An alternative way of improving the performance ... nitriding and as a result compressive residual stresses are formed This effect is typical for M2 grade steels High compressive stresses in the nitrided layer of a M2 steel lead to increased hardness and...
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Modeling and Simulation for Material Selection and Mechanical Design Part 15 pot
Ngày tải lên :
10/08/2014, 12:21
... materials for screw and clamped part (e.g Al-screws for Al-components) and using long thin walled distance tubes (e.g for pipe constructions) Figure 29 proposes a fundamental example for thermal ... operating force of screw (interesting for increasing the fatigue loading capacity of the fastening system), and reduces also the residual clamping force under axial loading with an operating force ... operation (for dynamic loading, see also Fig 52) Up to now, no time dependence of mechanical load is considered Fig 27 displays the effects for an alternating axial force Fax For positive axial force...
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Modeling and Simulation for Material Selection and Mechanical Design Part 16 ppsx
Ngày tải lên :
10/08/2014, 12:21
... responsible for the selection of screw size For a given screw strength and assembly method, the minimum level is generated for maximum friction coefficient Therefore, in Table 13 for metric screw ... in Fig 36 Between Fc and Ft, one can measure the contact angle E This value is 308 for hexagon and bihexagon drive, 458 for triple square (see also Fig 63) and about 608 for hexalobular drive ... bit and screw drive contour is too large, the bit life time decreases significantly and the danger of screw drive damaging occurs Often for small-volume-designs, the space for screw head and...
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Modeling and Simulation for Material Selection and Mechanical Design Part 17 potx
Ngày tải lên :
10/08/2014, 12:21
... initial preload for steel screw (light bar) and aluminum screw (dark bar) before and after thermal exposure For case (screw M10), this means 32 kN resp 19 kN before thermal exposure and kN resp kN ... and sort time relaxation Separating preload for given eccentrical loading with axial force Fax Maximum axial force for given preload Fp0, before component separating occurs Additional axial force ... particular application (size and number of rivets, geometry tolerances, and setting parameters) For more information regarding riveting systems, see Ref [59] For standardization of blind rivets,...
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Báo cáo hóa học: " Research Article A Framework for System-Level Modeling and Simulation of Embedded Systems Architectures" ppt
Ngày tải lên :
22/06/2014, 19:20
... model layer, and the mapping layer which is an interface between application and architecture models THE SESAME APPROACH The Sesame modeling and simulation environment facilitates performance analysis ... Architectures, Modeling, and Simulation, S Bhattacharyya, E Deprettere, and J Teich, Eds., pp 85–105, Springer, Berlin, Germany, 2003 [22] A D Pimentel, “The artemis workbench for system-level performance ... platforms: a disciplined approach,” IEEE Design and Test of Computers, vol 19, no 6, pp 6–16, 2002 [24] S Mohanty and V K Prasanna, “Rapid system-level performance evaluation and optimization for...
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Variational methods for modeling and simulation of tool tissue interaction
Ngày tải lên :
09/09/2015, 11:30
... tensor–mass method for fast computation of nonlinear viscoelastic mechanical forces and deformations for the simulation of biological soft tissues with the aim of developing a simulation tool for the planning ... problem Variational based modeling methods have many applications in soft tissue deformation modeling Realistic and efficient modeling and animation of skin for both humans and animals requires attention ... the deformable object, was also proposed by Coquillart for animating deformations This technique allows reusing of deformations for other objects and provides better control over the deformation...
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Modeling and simulation of an active robotic device for flexible needle insertion
Ngày tải lên :
16/10/2015, 15:38
... axial frictional force and a peak force Frictional force between the needle and the tissue in a uniform form along the shaft produces the axial force, and the cutting force causes a force peak at ... REVIEW 2.4 Tissue Deformation Modeling Soft tissue has visco-elastic behavior with anisotropic, nonlinear, and inhomogeneous characteristics Therefore, tissue modeling and tissue deformation are very ... frictional force and the needle tip force Nodes were maintained along the needle shaft and one node was at needle tip In simulation, a static ultrasound image was deformed using the generated mesh deformations...
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