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  Minimization of welding distortion and buckling: Modelling and implementation
Posted by: cordoba123 - 01-22-2012, 12:00 AM - Forum: Mechanics & Material Technology (Elasticity, Plasticity and Nonlinearity) - No Replies



Minimization of welding distortion and buckling: Modelling and implementation >> Edited by P Michaleris, Penn State University, USA

Author: Edited by P Michaleris, Penn State University, USA | Size: 15.92 MB | Format: PDF | Quality: Original preprint | Publisher: Woodhead Publishing Limited | Year: May 2011 | pages: 314 | ISBN: ISBN 1 84569 662 X ISBN-13: 978 1 84569 662 7

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- provides a systematic overview of the methods of minimizing distortion and buckling in welded structures
- focuses on understanding welding stress and distortion featuring computational welding mechanics and modelling the effect of phase transformations
- explores different methods of minimizing welding distortion discussing differential heating and dynamic thermal tensioning

Welding is a cost-effective and flexible method of fabricating large structures, but drawbacks such as residual stress, distortion and buckling must be overcome in order to optimize structural performance. Minimization of welding distortion and buckling provides a systematic overview of the methods of minimizing distortion and buckling in welded structures.

Following an introductory chapter, part one focuses on understanding welding stress and distortion, with chapters on such topics as computational welding mechanics, modelling the effect of phase transformations on welding stress and distortion and using computationally efficient reduced-solution methods to understand welding distortion. Part two covers different methods of minimizing welding distortion. Chapters discuss methods such as differential heating for minimizing distortion in welded stiffeners, dynamic thermal tensioning, reverse-side heating and ways of minimizing buckling such as weld cooling and hybrid laser arc welding.

With its distinguished editor and international team of contributors, Minimization of welding distortion and buckling is an essential reference for all welders and engineers involved in fabrication of metal end-products, as well as those in industry and academia with a research interest in the area.

Contents

PART 1 UNDERSTANDING WELDING RESIDUAL STRESS AND DISTORTION
PART 2 MINIMIZING WELDING DISTORTION

PART 1 UNDERSTANDING WELDING RESIDUAL STRESS AND DISTORTION

Introduction to welding residual stress and distortion
P Michaleris, Penn State University, USA
- Types of welding distortion
- Formation of welding distortion
- Distortion control methods
- Book outline
- References

Understanding welding stress and distortion using computational welding mechanics
L-E Lindgren, Luleå University of Technology, Sweden
- Introduction
- The Satoh test
- Thermo-mechanical analysis of welding problems
- Eularian and Lagrangian reference frames
- Nonlinear heat conduction
- Nonlinear deformation
- Finite element techniques in computational welding mechanics (CWM)
- Heat input models
- Material models
- References

Modelling the effects of phase transformations on welding stress and distortion
J A Francis and P J Withers, University of Manchester, UK
- Introduction
- Types of transformation
- Transformation strains
- Equilibrium phase diagrams
- Continuous cooling transformation (CCT) diagrams
- Significance of transformation temperature
- Metallurgical zones in welded joints
- Effects of phase transformations on residual stresses in welds
- Transformation plasticity
- Current status of weld modelling
- References

Modelling welding stress and distortion in large structures
L Zhang, Link-Belt Construction Equipment, USA
- Introduction
- 3D applied plastic strain methods
- Application on a large structure
- Conclusions
- References

Using computationally-efficient, reduced-solution methods to understand welding distortion
T G F Gray, University of Strathclyde, UK and D Camilleri, University of Malta, Malta
- Introduction
- Context and rationale for reduced solution methods
- Computationally-efficient solutions based on mismatched thermal strain (MTS) and transverse contraction strain (TCS) algorithms
- Verification of MTS and TCS algorithms
- Multiple welds
- Fillet welds
- Hybrid and stepwise strategies
- Selected case studies
- Future trends
- Sources of further information and advice
- References

PART 2 MINIMIZING WELDING DISTORTION

Minimization of bowing distortion in welded stiffeners using differential heating
M V Deo, Cummins Inc., USA
- Introduction
- Welding induced residual stress and bowing distortion
- Mitigation of welding induced bowing distortion
- Experimental verification of transient differential heating
- Results
- Conclusions
- References

Dynamic thermal tensioning for controlling welding induced distortion
W Li, The University of Texas at Austin and J Xu, Strategic Global Sourcing, USA
- Introduction
- A simplified finite element model
- The dynamic thermal tensioning method
- Mitigating buckling distortion using the dynamic thermal tensioning method
- Conclusions
- References

Minimizing buckling distortion in welding by weld cooling
J Li, Beijing Aeronautical Manufacturing Technology Research Institute and Q-Y Shi, Tsinghua University, P. R. China
- Introduction
- Welding with intensive trailing cooling, the dynamically controlled low stress no distortion
- (DC-LSND) method and its influence on welded joint (structure)
- Mechanism of DC-LSND method
- Restriction and industry application
- Conclusions
- References

Minimizing buckling distortion in welding by hybrid laser arc welding
S M Kelly, R P Martukanitz and E W Reutzel, Pennsylvania State University, USA
- Laser beam welding
- Hybrid laser arc welding (HLAW)
- Hybrid laser arc welding for reducing distortion in marine construction
- Conclusions
- References

Minimizing angular distortion in welding by reverse-side heating
M Mochizuki, Osaka University, Japan
- Introduction
- Experimental
- Mechanism of reduction in welding distortion
- Conclusions
- Acknowledgements
- References

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  Soil profiles
Posted by: DamirDz - 01-21-2012, 08:00 PM - Forum: Free Discussion - No Replies

Dear members,

Can anyone provide me some soil profile examples with as much soil parameters possible? Or possibly tell me where to look up some?

I need them for site response and liquefaction analysis.

Preferably european soils with a classification according to Eurocode 8.

Thanks!

DamirDz

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  Full Seismic Waveform Modelling and Inversion
Posted by: jamildear4u - 01-21-2012, 06:57 PM - Forum: Geophysical Engineering - No Replies


Full Seismic Waveform Modelling and Inversion (Advances in Geophysical and Environmental Mechanics and Mathematics)

Author: Andreas Fichtner | Size: 9.9 MB | Format: PDF | Quality: Original preprint | Publisher: Springer-Verlag Berlin Heidelberg 2011 | Year: 2010-11-23 | pages: 356 | ISBN: 3642158064

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Recent progress in numerical methods and computer science allows us today to simulate the propagation of seismic waves through realistically heterogeneous Earth models with unprecedented accuracy. Full waveform tomography is a tomographic technique that takes advantage of numerical solutions of the elastic wave equation. The accuracy of the numerical solutions and the exploitation of complete waveform information result in tomographic images that are both more realistic and better resolved. This book develops and describes state of the art methodologies covering all aspects of full waveform tomography including methods for the numerical solution of the elastic wave equation, the adjoint method, the design of objective functionals and optimisation schemes. It provides a variety of case studies on all scales from local to global based on a large number of examples involving real data. It is a comprehensive reference on full waveform tomography for advanced students, researchers and professionals.

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  Classical Mechanics, Third Edition by Goldstein poole, Safko
Posted by: jamildear4u - 01-21-2012, 06:03 PM - Forum: Mechanics & Material Technology (Elasticity, Plasticity and Nonlinearity) - No Replies


Classical Mechanics, Third Edition by Goldstein poole, Safko

Author: goldstein poole, safko | Size: 140.7 MB | Format: PDF | Quality: Unspecified | Publisher: Addison Wesley | Year: 2001 | pages: 336 | ISBN: 0321188977

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For 30 years, this book has been the acknowledged standard in advanced classical mechanics courses. This classic book enables readers to make connections between classical and modern physics — an indispensable part of a physicist's education. In this new edition, Beams Medal winner Charles Poole and John Safko have updated the book to include the latest topics, applications, and notation to reflect today's physics curriculum. ”

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  Spreadsheet For EC3
Posted by: xeaheat - 01-21-2012, 01:04 PM - Forum: Request for Civil Engineering Documents - No Replies

Can someone provide Excel spreadsheets for steel design according to EC3?

Thx in advance
Regards

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  Hordie Slab Drawing
Posted by: amirhamad - 01-21-2012, 01:01 PM - Forum: Request - No Replies

terms "Hordy bricks", "Hordy block infill", and "...ribbed slab construction utilizing the hordy concrete block infill..."
any one have drawing for slab like this .... i would be so thank full for sharing....
plz...

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  Design Tables For Water Retaining Structures
Posted by: aslam - 01-21-2012, 04:02 AM - Forum: Concrete - Replies (3)

DESIGN TABLES FOR WATER RETAINING STRUCTURES

Author: - | Size: 78 MB | Format: PDF | Quality: Unspecified | Publisher: Longman Scientific & Technical. | Year: 1991 | pages: 208 | ISBN: -

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This book provides a comprehensive understanding of the design and construction of waterretaining structures. allowing graduate civil and structural engineering students. as well
as the practising engineer. to design with speed and economy. Assuming some familiarity with BS 8110 Structural Use of Concrete the book draws on examples. many of which
are based on actual completed structures. and upon extensive tables. related to the analysis of rectangular. circular and conical structures, to develop good working practice. The tables and examples will enable the engineer to check, by hand, the often complex results of computer analysis and output. usually based on the finite element method. for most structures. This is particularly so in those cases where the forces within a structure are affected by the ground upon which they sit. Thus, methods of designing for the soil/structure interaction, which normally require the aid of complex computer programs. are included. The tables and examples will prove to be a good reference for carrying out new work to modern methods and regulations. and will give direction to the student engineer in the use of currrent British Standards for the design of many types of concrete structures.
An essential part of the book are the listed computer programs and output which further assist the designer in obtaining a range of options from which the most effective and economical solution may be determined for a particular structure; whilst a useful appendix covers the analysis of ground-supported open circular concrete tanks.

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  Steels: Metallurgy and Applications, Third Edition
Posted by: jamildear4u - 01-20-2012, 06:46 PM - Forum: Mechanics & Material Technology (Elasticity, Plasticity and Nonlinearity) - No Replies

Steels: Metallurgy and Applications, Third Edition

Author: D. T. Llewellyn‏, Roger C. Hudd‏ | Size: 19.53 MB | Format: PDF | Quality: Unspecified | Publisher: Butterworth-Heinemann | Year: 1998 | pages: 400 | ISBN: 0750637579

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STEELS provides a metallurgical understanding of commercial steel grades and the design, manufacturing and service requirements that govern their application. The properties of different steels are described, detailing the effect of composition, processing and heat treatment. Where appropriate an introduction is given to standard specifications and design codes provided on component manufacture and property requirements for successful service performance.

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  Sediment Engineering
Posted by: balimela - 01-20-2012, 03:29 PM - Forum: Archive - No Replies

Sedimentation Engineering (Manual 54)

Edited by Vito A. Vanoni

ASCE Manuals of Practice (MOP) 54

2006 / 8.5x11 / 430 pp.

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  DD 171:1987 Guide to specifying performance requirements for hinged or pivoted doors
Posted by: mybest - 01-20-2012, 02:49 PM - Forum: Codes, Manual & Handbook - No Replies


DD 171:1987 Guide to specifying performance requirements for hinged or pivoted doors (including test methods)

Size: 850 KB | Format: PDF | Quality: Original preprint | Publisher: BSI Group | Year: 30 October 1987 | pages: 30 | ISBN: 0 580 16127 7

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Construction systems parts, Doors, Hinged doors, Swing doors, Performance, Dimensional changes, Deformation, Sound insulation, Fire doors, Fire resistance, Weather resistance, Thermal transmittance, Thermal insulation, Crime prevention devices, Watertightness tests, Wind resistance, Air permeability, Performance testing, Impact testing, Torsion testing, Deflection tests, Vibration testing, Environmental testing, Thermal testing, Test equipment, Grades (quality), Testing conditions, Specification (approval)

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