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barcode generator vb.net source code r o 2(3 + ) 8g in Software
2 r o 2(3 + ) 8g GTIN  13 Decoder In None Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications. Generating EAN13 In None Using Barcode generation for Software Control to generate, create EAN13 Supplement 5 image in Software applications. (7.58) GTIN  13 Recognizer In None Using Barcode reader for Software Control to read, scan read, scan image in Software applications. GTIN  13 Encoder In Visual C#.NET Using Barcode generator for VS .NET Control to generate, create EAN / UCC  13 image in Visual Studio .NET applications. Downloaded from Digital Engineering Library @ McGrawHill (www.digitalengineeringlibrary.com) Copyright 2004 The McGrawHill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website. UPC  13 Drawer In .NET Using Barcode generation for ASP.NET Control to generate, create EAN13 image in ASP.NET applications. Generate European Article Number 13 In Visual Studio .NET Using Barcode generator for .NET Control to generate, create EAN 13 image in VS .NET applications. FLYWHEELS 7.19
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Drawing UCC  12 In None Using Barcode printer for Software Control to generate, create EAN / UCC  14 image in Software applications. Drawing Barcode In None Using Barcode generation for Software Control to generate, create bar code image in Software applications. For a constantthickness disk without a central hole, the radial and tangential stresses are then given by r = 0 1 t = 0 1 and the maximum stress, at r = 0, is r,max = t,max = 0 For a disk with a central hole, the stresses are given by r = 0 1 t = 0 1 The maximum radial stress, at r = r 2 r2 r2 i i 2 + 2 ro ro r 2 1 + 3 r 2 r 2 r 2 i i 2 + 2 + 3 + ro ro r 2 (7.62) (7.61) r2 2 ro 1 + 3 r 2 2 3 + ro (7.59) Generating EAN 13 In None Using Barcode drawer for Software Control to generate, create European Article Number 13 image in Software applications. Encoding Code 128C In None Using Barcode creator for Software Control to generate, create Code 128B image in Software applications. (7.60) USD8 Generation In None Using Barcode creator for Software Control to generate, create Code 11 image in Software applications. Bar Code Encoder In Java Using Barcode encoder for BIRT Control to generate, create barcode image in Eclipse BIRT applications. (7.63) Painting Linear 1D Barcode In .NET Using Barcode printer for ASP.NET Control to generate, create Linear image in ASP.NET applications. Generating EAN 13 In VS .NET Using Barcode generation for VS .NET Control to generate, create EAN / UCC  13 image in Visual Studio .NET applications. rori , is ri ro
Printing Bar Code In .NET Framework Using Barcode creator for .NET framework Control to generate, create barcode image in .NET applications. Print UCC.EAN  128 In Java Using Barcode generator for Java Control to generate, create GS1 128 image in Java applications. r,max = 0 1 and the maximum tangential stress, at r = ri , is t,max = 0 2 + The inertia is J=
Decoding DataMatrix In Java Using Barcode scanner for Java Control to read, scan read, scan image in Java applications. UPCA Creator In .NET Using Barcode printer for VS .NET Control to generate, create UPC A image in .NET applications. (7.64) 2 2 r 2 i 2 3 + ro
(7.65) z 4 (r o r 4) i 2g
(7.66) Example 8. A steel disk of uniform thickness and outer radius 0.6 m rotates at 30 rad/s. Find the maximum stress in the disk if it has an integral shaft, neglecting stress rises due to the geometry change at the shaft. What is the maximum disk stress if the disk is bored for a shaft of 0.025m radius The stress is independent of thickness. From Eqs. (7.58) and (7.61) with = 76.5 kN/m3 and = 0.3, r,max = t,max = 0 = 76.5(0.6)2(30)2(3 + 0.3) = 1.043 MPa 8(9.80)(1000) (7.67) 0.6(0.025) = 0.122 m. For the bored disk, the maximum radial stress occurs at r = From Eq. (7.64), r,max = 1.043 1 0.025 0.6 = 0.958 MPa
(7.68) Downloaded from Digital Engineering Library @ McGrawHill (www.digitalengineeringlibrary.com) Copyright 2004 The McGrawHill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website. FLYWHEELS 7.20
MACHINE ELEMENTS THAT ABSORB AND STORE ENERGY
The maximum tangential stress occurs at the hub. From Eq. (7.65), t,max = 1.043 2 + = 2.09 MPa 2 2(0.3) (0.025)2 (0.6)2 3 + 0.3 (7.69) 7.4 FLYWHEELS FOR ENERGY STORAGE
The flywheel can be used as an energy reservoir, with energy being supplied at a slow constant rate or when it is available and being withdrawn when desired. A flywheel might, for example, be used to give good acceleration to an automobile that is underpowered by present standards. Regenerative breaking, power storage for peakdemand periods, and mechanical replacements for battery banks are all potential uses for the flywheel. The high charging and discharging rates of a flywheel system give it an advantage over other portable sources of power, such as batteries. Although the concepts developed in the previous sections are still true for energystorage flywheels, the purpose is now to store as much kinetic energy, 0.5J 2, as possible. In most applications, the flywheel speed does not vary over 50 percent, so that only about 75 percent of this total energy is actually recoverable. The design of the ordinary flywheel is usually dictated by the allowable diameter, governed by the machine size, and the maximum speed, governed by the practicalities of a speedincreasing drive and higher bearing speeds. These constraints can result in a low peripheral speed, causing the economics to favor a rimtype flywheel design. The economics change with the energystorage flywheel, since (1) larger values of total stored energy are usually involved, requiring heavier flywheels or more energy per unit weight of flywheel, (2) the weight of a heavy flywheel and the correspondingly heavy bearings and other components may be unacceptable, especially in mobile applications, and (3) the design constraints imposed in a machine where the flywheel limits the speed variation can be relaxed when the flywheel is the main component, encouraging optimization. Depending on the application, the energy per dollar, energy per weight, or energy per swept volume is usually maximized [7.1]. 7.4.1 Isotropic and Anisotropic Designs The stress equations for the thin disk given in Sec. 7.3.3 can be solved with r = t to give the shape for a fully stressed thin isotropic disk with no central bore: z = z0 exp 2 r2 2gSy (7.70) where Sy = allowable strength, for example, the yield strength of the material. Define the energy stored per unit weight as R = Fs Sy (7.71) where Fs is a dimensionless factor that depends only on the shape of the flywheel. Using Eqs. (7.46) through (7.49), it turns out that the efficiency or geometric shape Downloaded from Digital Engineering Library @ McGrawHill (www.digitalengineeringlibrary.com) Copyright 2004 The McGrawHill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website.

