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  Numerics of Unilateral Contacts and Friction By Christian Studer
Posted by: cargadory2k - 11-18-2010, 09:53 PM - Forum: Mechanics & Material Technology (Elasticity, Plasticity and Nonlinearity) - Replies (2)



Numerics of Unilateral Contacts and Friction Modeling and Numerical Time Integration in Non-Smooth Dynamics by Christian Studer

Author: Christian Studer | Size: 4,00 MB | Format: PDF | Publisher: Springer | Year: 2009 | pages: 182 | ISBN: 3642010997

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Numerics of Unilateral Contacts and Friction: Modeling and Numerical Time Integration in Non-Smooth Dynamics
(Lecture Notes in Applied and Computational Mechanics) By Christian Studer
Publisher: Sp.rin.ger 2009
ISBN: 3642010997
182 Pages - PDF - 4 MB

This book is especially suited for people both in research and industry who are interested in the numerical simulation of mechanical systems with unilateral contacts and friction. Such systems can be found in various fields of technical application; consider for example contacts between wheels and ground in vehicle dynamics, walking machines, limit stops and friction in arbitrary kind of mechanisms or contacts between thousands of grains in granular mechanics. The book focuses mainly on rigid multibody systems dynamics with unilateral contacts and friction, however, the proposed non-smooth modeling approach is much more general and also well suited for non-rigid applications.

Four main topics are addressed:
* Non-smooth modeling of unilateral contacts and friction by set valued force laws,
* Mathematical evaluation of these laws using normal cone inclusions with associated projective equations,
* Numerical time-stepping integration methods for non-smooth systems,
* Implementation in a software code.

The book closes the gap between highly specialized mathematical literature and engineering application, gives an excellent overview on well established methods in non-smooth mechanics and opens new perspectives for the future development in this promising field of active research.

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  Guide to Concrete for Housing
Posted by: ir_71 - 11-18-2010, 06:26 PM - Forum: Concrete - No Replies

Guide to Concrete for Housing

Size: 4.13 MB | Format: PDF | Year: June 2000 | ISBN: 9781877023200

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First published June 2000 as The Housing Concrete Handbook CCAA T53
© Cement Concrete & Aggregates Australia 2007
Design and layout Helen Rix Design Illustration TechMedia Publishing Pty Ltd
ISBN 9781877023200

This guide is written, primarily, as a reference guide for house builders and tradespeople working with concrete, mortar and render. TAFE students and their instructors will find it a helpful reference; and design professionals will find it informative. It updates and supersedes the earlier publication The Housing Concrete Handbook, June 2000.
It gives practical information about the use of concrete, mortar and render in the construction of houses and other small buildings, including floors, driveways, paths, and patios.
It covers the essential topics in enough detail to give house builders all they need to know about good quality concreting, and to alert them to poor practices.
More comprehensive technical information about the use of concrete in all forms of construction can be found in CCAA's Guide to Concrete Construction (T41). Further information on specific applications can be found in a number of publications produced by Cement Concrete & Aggregates Australia and generally available free on CCAA website http://www.concrete.net.au. Relevant ones applicable to the subject areas covered by this publication are listed in Appendix B.

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  Ultra Fractal Animation Edition 5.04
Posted by: hbasxd05 - 11-18-2010, 06:21 PM - Forum: Non Engineering Software - Replies (1)


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Ultra Fractal is the best tool to create fractal artwork and fractal animations. Whether you are a graphics designer, a professional fractal artist, a video producer, or a complete beginner, Ultra Fractal 4 makes it easy to create beautiful fractal pictures, animated textures, and moving fractal backgrounds.


Features:
Get started quickly with the integrated tutorials
It is easy and fun to start using Ultra Fractal with the built-in tutorials. Starting with the basics, you will soon learn how to create your own fractals, change the colors, add layers, use masks, and even create animations. You can also download the PDF manual to print the tutorials.
Explore thousands of fractal types and coloring options
First explore the standard fractal types in Ultra Fractal to get familiar with them. Then connect to the online formula database to download thousands of additional fractal formulas and coloring algorithms contributed by other users.
In Ultra Fractal 5, formulas can now use plug-ins which lets you easily mix and match features. By combining different plug-ins, the possibilities truly become endless. For more information, see Plug-ins in the Ultra Fractal help file.
Finding the best formulas and classes is made easy by the new formula rating system.
Enjoy unlimited deep zooming
You can zoom to virtually unlimited depths with Ultra Fractal. Deep zooming is fully integrated and works with all fractal types and coloring options, even those you have written yourself!
Use the classic selection box shown above, or zoom with the mouse by Shift-dragging or double-clicking inside the fractal window. Panning, rotating, stretching, and skewing are also possible, of course.
Tweak parameters with the versatile Explore feature
Choosing parameter values is a breeze with the new Explore feature. Experiment with new parameter values by moving the mouse cursor over a coordinate grid in the Explore window, while the Fractal Mode tool window shows a real-time preview of the result.
Explore works with integer, floating-point, and complex parameters.
Color your fractals and add transparency effects
Coloring your fractals is easy with Ultra Fractal's gradient editor. Drag the gradient curves up and down to create smooth ranges of colors, or use the Randomize options to quickly try various color combinations. You can also use the gradient editor to add transparency effects.
Compose fractals with layers, masks, layer groups and Photoshop-like merge modes
One of Ultra Fractal's key features is layering. You can place multiple layers of fractals on top of each other to combine them and create intricate coloring and texturing effects. Add mask layers to create transparent areas that will let the underlying layers shine through. Organize related layers in layer groups. Store layers or groups that you often use in the layer presets menu to access them quickly. You can even select multiple layers to edit their parameters together. (Creative Edition only.)
The Layers and Masks tutorials in the help file will show you how to use layers effectively.
Image import
Import PNG, JPEG or BMP images in your fractals with the built-in image import feature. Simply select a coloring algorithm that contains an image parameter, and you can select any image on your computer to use.
The coloring algorithm determines how the information from the image is used. For example, the standard Image coloring algorithm just displays the entire image in the fractal window.
Create fractal animations easily with the powerful animation features
In Ultra Fractal, every fractal is potentially an animation. Every parameter can be animated individually. Animations can be as long as you want and use any desired frame rate. Editing animations is easy with the powerful Timeline tool window, shown below. You can render animations with optional motion blur to image sequences or to AVI movies. (Extended Edition only.)
The Working with animations tutorial in the help file will get you started with creating your own fractal animations.
Open and organize your fractal files
Organize all your fractal-related files with the integrated Explorer-like file browsers. Quickly scan formula files and parameters with the new thumbnail view and the powerful search tools.
Copying and moving fractals, formulas, and parameter sets is easy with drag-and-drop or copying and pasting.
Render your artwork to produce fractal movies and high-quality images for printing and publishing
Create stunning fractal movies and high-quality images in full color at any size and resolution with the Render to Disk feature. Built-in anti-aliasing and motion blur smooths and sharpens rendered images and removes jagged edges. Ultra Fractal exports and renders to JPEG, Photoshop, TIFF, PNG, Windows BMP, Targa, and AVI files.
Multiple render jobs can be queued and rendered sequentially or simultaneously. You can also render multiple fractals from a parameter file in a single step.
Accelerate fractal calculations by connecting to other computers on your network
Connect to other computers on your local network or even on the Internet to speed up fractal calculations and disk render jobs. Ultra Fractal distributes calculations over the connected computers to accelerate them, which can easily double or triple the processing power of your own computer. (Extended Edition only)
Write your own fractal formulas
Every fractal type, coloring option, and transformation in Ultra Fractal is a formula that you can edit and customize at will using the built-in syntax-highlighting formula editor. Add your own fractal formulas and coloring algorithms and upload them to the online formula database to share them with other users.
There is no speed penalty — your formulas will run just as fast as all other formulas because they are all executed by the same fast optimizing built-in formula compiler. The formula language includes complex numbers, arrays, variable types, color arithmetic, warnings, global sections, and debugging support. Full documentation with a searchable compiler reference is included.
New in Ultra Fractal 5 is support for functions and classes in the compiler, which makes it possible to write extensible formulas that can be combined with different plug-ins in any way imaginable.
Share fractals and get help on the mailing list
Join the free Ultra Fractal mailing list to discuss tips and tricks and share your fractals with other users. Learn more about Ultra Fractal by opening and examining the fractals posted by other members, and get help from experts in a friendly atmosphere. See also Support.
With excellent help file and PDF manual
An excellent help file in Windows HTML Help format is included with Ultra Fractal that is easy to read and full of information. The help file is available online as well. Alternatively, you can download or order the help file as a PDF manual for easy printing. There are also Spanish and German translations.
For Windows 7, Vista, XP...
Ultra Fractal is designed for Windows 7, Vista and XP. It takes full advantage of Windows Aero and Windows XP themes. Windows 2003, 2000, Me, and 98 are also supported.
Ultra Fractal will take advantage of multicore and multiprocessor systems where possible. You can also run Ultra Fractal on a Mac with VMware Fusion, Parallels, Boot Camp or Virtual PC (PowerPC only), or on Linux with WMware or WINE.


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  Damage Mechanics - by George Z Voyiadjis, Peter I Kattan
Posted by: melkat - 11-18-2010, 02:12 PM - Forum: Other Materials (Wood, Brick, etc.) - Replies (3)

Damage Mechanics

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[Image: info.png]
George Z. Voyiadjis
Peter I. Kattan
© 2005 by Taylor & Francis Group, LLC
ISBN-10: 0824727576 (Hardcover)
ISBNr-13: 9780824727574 (Hardcover)
Size of Zip file: 2.59 mb
271 pages

The book presents the principles of continuum damage mechanics including the latest research by the authors. The presentation is theoretical in nature emphasizing the detailed derivations of the various models and formulations. The work of various active researchers in this area is also presented. Both isotropic and anisotropic damage mechanics theories are discussed. Also, both elastic and elasto-plastic damage analyses are presented. The presentation used in this book is consistent and systematic. Many examples illustrating the theory are presented especially in the early chapters of the book. In addition, a large number of problems appear at the ends of sections and chapters for students to be used as practice. The book can be used as a graduate textbook for students in the areas of civil engineering, mechanical engineering, aerospace engineering, materials science, and engineering mechanics. The book can also be used as a reference for active researchers in this field as well as for practicing engineers.

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  ACI SP-230-53 Guide Examples for Design of Concrete Reinforced with FRP Bars
Posted by: pssst - 11-18-2010, 12:40 PM - Forum: Journals, Papers and Presentations - No Replies

ACI SP-230-53 Guide Examples for Design of Concrete Reinforced with FRP Bars

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Keywords: codes and standards; concrete design; FRP reinforcement

Synopsis:This paper presents design examples that illustrate the interaction of design parameters, to examine some of the more critical issues and challenges that arise when designing FRP-RC to satisfy ultimate strength and serviceability criteria using the ACI 440.1R-03 Guide. A spreadsheet program was written for flexural and serviceability analysis and design of concrete sections reinforced with a single layer of glass or carbon FRP bars. Analysis and design examples were developed and design aids were constructed to assist in economically and efficiently sizing FRP-reinforced concrete members. Potential difficulties that arise from the inherent nature of FRP-reinforced concrete failure modes have been identified and explored.

by W.K. Feeser and V.L. Brown

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  ACI SP-215-26 Flexural Strengthening of Masonry Walls in a High School Using FRP Bars
Posted by: pssst - 11-18-2010, 12:25 PM - Forum: Journals, Papers and Presentations - No Replies

ACI SP-215-26 Flexural Strengthening of Masonry Walls in a High School Using FRP Bars

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Keywords: cracking; fiber reinforced polymer (FRP); flexure; glass fiber; strengthening; unreinforced masonry

Synopsis: Fiber reinforced polymer (FRP) composites in the form of laminates or bars have been proven to be effective for the strengthening of unreinforced masonry (URM)
walls subjected to overstresses. Two installation techniques have been proposed:
externally-bonded FRP laminates (i.e. manual lay-up or adhesion of pre-cured laminates)
and near surface mounted (NSM) FRP bars. The latter technique consists of placing a
bar in a groove cut into the surface of the member being strengthened. This paper
presents a field application on flexural strengthening with NSM FRP bars of two cracked
URM walls in an educational facility. Design considerations and the results of an
experimental program conducted to validate the strengthening are described.

by J. G. Tumialan, N. Galati, A. Nanni, and D. Tyler

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Moderator note:
Thanks for the post!
To be clear and avoid mistakes, consider separate with spaces the download links.

Regards

Dell Brett


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  Comparative Study AISC - LRFD an EC3 Approaches to Beam-Column Buckling Resistance
Posted by: pssst - 11-18-2010, 12:00 PM - Forum: Journals, Papers and Presentations - Replies (3)

Comparative Study AISC - LRFD an EC3 Approaches to Beam-Column Buckling Resistance

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Keywords: Beam - columns ; Steel members ; Steelwork Standards ; Interaction formulae ; Stability

Abstract: The paper presents a comparative study of a well-established steelwork design standard, the American AICS LRFD
and the new European code for the design of steel structures, Eurocode 3. First, the paper compares the formulation of both
codes on order to identify similarities and differences. Then the comparative study is performed for a rolled I-section with different slenderness. Most frequent cases of linear and parabolic moment distributions are considered. The results are presented graphically by means of interaction diagrams to facilitate their interpretation and to detect differences in resistance.
The comparative study shows that the resistance capacities given by LRFD and the two methods of EC3 can differ appreciably when slenderness is high and the member is subjected to linear moment distribution with opposite end-moments.
Finnaly the paper presents a LRFD-EC3 combined approach which can be used to estimate the resistance of beam-columns.

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  Constitutive modeling in soils
Posted by: freequo - 11-18-2010, 11:51 AM - Forum: Free Discussion - Replies (4)

Does anybody know how to start writting your own constitutive model based on tests that you've done in lab (triaxial test and oedometer test).
Is there some procedure that you have to stick by.
Best regards
f

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  ACI SP-265-15 Structural Concrete Beam Shear - Still a Riddle ?
Posted by: pssst - 11-18-2010, 11:09 AM - Forum: Journals, Papers and Presentations - No Replies

SP-265-15 Structural Concrete Beam Shear - Still a Riddle ?

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Synopsis: The paper reviews the application of classical plasticity theory to shear
failure of structural concrete beams. The resistance of concrete to shearing deforma-
tions is described by the modified Coulomb failure criterion. For beams with shear
reinforcement, this leads to an upper bound solution based on yield lines minimizing
the combined work of yielding stirrups and cracking concrete, the coinciding lower
bound solution corresponding to an inclined compression field (the web-crushing
criterion). For beams without shear reinforcement, the optimal failure mechanism is
a single yield line (straight or hyperbolic) from load to support, the coinciding lower
bound solution corresponding to a compressive strut between the load and support
platens. The predicted failure mechanisms and ultimate loads are compared with
experimental evidence, and it is concluded that the plasticity approach goes a long
way toward solving the riddle of shear failure.

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  Corrosion and protection
Posted by: ir_71 - 11-18-2010, 09:58 AM - Forum: General Books - Replies (2)

Corrosion and protection

[Image: 28720455686421039301.jpg]

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Product Details
Hardcover: 336 pages
Publisher: Springer; 1st Edition. edition (January 9, 2004)
Language: English
ISBN-10: 1852337583
ISBN-13: 978-1852337582

Review
Praise for Einar Bardal's, Corrosion and protecction

Choice

"The style is direct and the explanations easily followed. The theoretical material is not ove4rwhelming but is adequate of a strong foundation. Many clear and affective figures and diagrams are included. The book is recommended for introductory courses in corrosion and as a practical reference for practicing engineers and technicians who want a clear description o basic principles and applications."

Product Description
Corrosion and Prevention is an essential guide for mechanical, marine and civil engineering students and also provides a valuable reference for practicing engineers. Bardal combines a description of practical corrosion processes and problems with a theoretical explanation of the various types and forms of corrosion, with a central emphasis on the connections between practical problems and basic scientific principles. This well thought-out introduction to corrosion science, with excellent examples and useful tables, is also extremely well illustrated with 167 diagrams and photographs. Readers with a limited background in chemistry can also find it accessible.



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