Introduction to structural dynamics and aeroelasticity
Author: Dewey H. Hodges, G. Alvin Pierce | Size: 26,5 MB | Format:PDF | Publisher: Cambridge University Press | Year: 2002 | pages: 170 | ISBN: 0521806984
Aeroelastic and structural dynamic phenomena play an important role in many facets of engineering. In particular, an understanding of these disciplines is essential to the design of aircraft and space vehicles and longest suspension bridge. This text provides an introduction to structural dynamics and aeroelasticity, with an emphasis on conventional aircraft. The primary areas considered are structural dynamics, static aeroelasticity, and dynamic aeroelasticity. The structural dynamics material emphasizes vibration, the modal representation, and dynamic response. Aeroelastic
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Pore structure of cement-based materials : testing interpretation & requirements
Author: Kalliopi K Aligizaki Publisher: Taylor & Francis | Year: 2005 | pages: 432 | ISBN: 9780419228004
Summary:
This book provides a clear introduction to the various experimental techniques used for characterizing the pore structure of hardened cement-based materials. It begins with a comprehensive outline of the traditional and the recently-developed techniques for determining the pore structure of hardened cement paste, and continues with a discussion of the methods used for air-void analysis in air-entrained concrete. Directed to the student and engineer, this volume serves as a useful introduction to the topic of microstructure characterization, and provides a comprehensive set of references for further information.
Contents:
Introduction. Pores in Cement Paste. Methods for Characterizing Pore Structure. Definition of Pore Structure Parameters. Specimen Pretreatment Techniques. Drying Techniques. Solvent Replacement. Preparation for Microscopic Analysis. Mercury Intrusion Porosimety. Theory and Testing Procedure. Plots Obtained. Range of Sizes Determined. Hysteresis in Pore Size Distribution. Advantages and Limitations. Gas Adsorption. Theory and Testing Procedure. Analysis of Data. Range of Sizes Determined. Adsorption Hysteresis. Different Adsorbates Used. Advantages and Limitations. Displacement Methods. Evaporable Water Content. Solvent Exchange. Helium Pycnometry. Nuclear Magnetic Resonance. Instrumentation. Theoretical Aspects. Pore Size Determination. Magnetic Resonance Imaging. Advantages and Limitations. Small Angle Scattering. Theoretical Aspects. Experiment and Analysis. Plots Obtained. Range of Sizes Determined. Advantages and Limitations. Microscopic Techniques. Optical Microscopy. Electron Microscopy. Stereological Methods for Air Void Analysis. Comparison of Results Obtained by Various Techniques. Comparison with Mercury Intrusion Porosimetry. Comparison with Nitrogen Adsorption. Comparison with Replacement Techniques. Comparison with Microscopic Techniques.
This is a well-known classic thesis from Caltech entitled: the response of nonlinear multi-story structures subjected to earthquake excitation. The thesis has proposed the One-Component and Two-Component Beams model, a model to represent a nonlinear beam which has used the combination of spring - linear element - spring. This model was then enhanced and hence known as lumped plasticity model which is currently available in SAP2000/ETABS/Ruaumoko/OpenSees. In Ruaumoko, the author name is used as the name of a nonlinear elements in FRAME element (so-called Giberson beam).
The thesis is very useful in understanding the nonlinear model of beam especially for those who are interesting in analytical modelling.
DIRECT LINKS
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BS ISO 14347:2008 Fatigue - Design procedure for welded hollow-section joints - Recommendations
Author: International Institute of Welding, Commission XV | Size: 2.4 MB | Format:PDF | Publisher: ISO | Year: 2008 | pages: 76 | ISBN: 978 0 580 53490 4
1.1 General
This International Standard gives recommendations for the design and analysis of unstiffened, welded, nodal
joints in braced structures composed of hollow sections of circular or square shape (with or without
rectangular chord) under fatigue loading.
This International Standard applies to structures:
a) fulfilling quality requirements for hollow sections (see Annex A);
b) complying with recommended weld details (see Annex B);
c) employing permitted steel grades (see 1.2);
d) having hollow section joints (see 1.3);
e) having either
1) square or rectangular hollow sections with a thickness between 4 mm and 16 mm, or
2) circular hollow sections with a thickness between 4 mm and 50 mm;
f) having as stress range the range of “hot-spot” stress;
g) having identical brace (branch) members.
1.2 Materials
This International Standard applies to both hot-finished and cold-formed steel structural hollow sections,
complying with the applicable national manufacturing specification, that fulfil specified quality requirements
(see Annex A).
1.3 Types of joints
This International Standard applies to joints consisting of circular hollow sections (CHS) or rectangular hollow
sections (RHS) as used in uniplanar or multiplanar trusses or girders, such as T-, Y-, X-, K-, XX-, and
KK-joints (see Figure 1 and Figure 2).
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Lectures 27 to 39 are missing...If anyone have them Please Share
This Material Was Very Usefull For Me
I hope will be the same for you.....Enjoy
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Posted by: 3fan - 12-12-2010, 08:30 AM - Forum: Archive
- No Replies
Dear members i am looking for this publication, if you can help me:
Guidelines of engineering practice for braced and tied-back excavations
(ASCE GEOTECHNICAL SPECIAL PUBLICATIONS No 74)
Author : American Society of Civil Engineers. Committee on Earth Retaining Structures
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Features
Discusses CFRP laminate plates, and GFRP plates, composite sandwich panels
Addresses both high and low velocity impacts
Examines impact stress analysis of composite plates and tubes
Explores damage resistance and damage tolerance
Summary
Much of the early, pioneering work on the properties of composites under impact is still conceptually relevant, yet the results of many such analyses are outdated. The accuracy of these results depend specifically on the materials used (fibre, resin), interface, and method of fabrication. Development of new materials, cost effective design, and analysis and prediction of structural behaviour have all established a need for timely, wide ranging research on impact behaviour.
Impact Behaviour of Fibre-Reinforced Composite Materials and Structures brings together - for the first time - state-of-the-art research from the most recent works of leading, international experts. An important new study, this book extensively investigates impact response, damage tolerance, and failure of fibre-reinforced composite materials and structure, from a number of expert viewpoints.
This book explores the nature of modern polymer composites based on glass, carbon, aramid, ceramic and polymer fibres in a polymer matrix, and details various ways of analysing the impact process. Impact Behaviour of Fibre-Reinforced Composite Materials and Structures will prove itself a valuable tool for research and development engineers, structural engineers, materials scientists, designers, and students and researchers of related disciplines.
An overview of the impact behaviour of fibre-reinforced resin composites. Recent developments in impact damage assessment of fibre composites, J.K. Kim, Hong Kong University of Science and Technology. Modelling impact of composite structures using small specimens, C. Ruiz and J. Harding, University of Oxford. Impact damage-tolerant composite structure design, R.L. Sierakowski, Ohio State University, USA. Damage tolerance of thick woven roving CFRP plates subjected to low velocity impact, G. Zhou and L.G. Greaves, Loughborough University, U.K. Impact stress analysis of composite plates and tubes, S.R. Swanson, University of Utah, USA. Impact behaviour and analysis of CFRP laminated plates, E. Wu and Dr. Tsai, National Taiwan University, Taiwan. Response of GRP composite sandwich panels to impact and blast loading, S.R. Reid and H.M. Wen, UMIST, Manchester, UK. High velocity impact damage to polymer matrix composites, R.C. Tennyson and Dr. Montagne, University of Toronto, Canada.
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Author: Hani M. Tawancy, Anwar Ul-Hamid, Nureddin M. Abbas | Size: 9.5 MB | Format:PDF | Publisher: CRC | Year: 2004 | pages: 608 | ISBN: 0824757424
Features
Illustrates a wide variety of techniques to determine the cause and mode of failure and identify the weakest link in the design-fabrication-performance chain of a product
Provides the tools necessary to evaluate, predict, and prevent component failure in a broad range of materials
Contains a variety of case studies-arranged by industry-that showcase failures related to the processing of materials, manufacturing conditions, and noncompliance with operating instructions
Discusses faults due to shortcomings in design, casting, forging, welding, machining, and heat treatment.
Summary
Filling a gap in the literature, Practical Engineering Failure Analysis vividly demonstrates the correct methodology to conduct successful failure analyses, as well as offering the background necessary for these investigations. This authoritative reference covers procedures to reduce the occurrence of component failures due to errors in material selection, design, and manufacturing, as well as fatigue, stress, cracking, creep, and operating conditions.
A single-source tool to help professionals avoid costly system failures, improve plant operation and system reliability, and prevent accidents related to component malfunction
NTRODUCTION
Engineering Products and Their Performance
Engineering Properties of Materials
Classes of Engineering Alloys
Structure of Engineering Alloys
Failure of Engineering Products
Imperfect vs. Defective Products
Definition and Objective of Failure Analysis Investigations
Approach to Failure Analysis Investigations
Background Requirements of the Failure Analyst: Scope of the Book
ENGINEERING DESIGN-FABRICATION-PERFORMANCE
Introduction
Stages of Engineering Design
Material Selection
Fabrication of Engineering Alloys
Solidification of Ingots
Cold Working
Recrystallization
Thermomechanical Processing
Primary Fabrication Techniques
Secondary Fabrication Techniques
Joining Techniques
Service Performance
Common Causes of Failure
PRINCIPLES OF MECHANICS
Introduction
Concepts of Mechanics
Concepts of Mechanical Force
Concepts of Work and Energy
Force and Motion
Conservation of Energy
Concept of Machines
State of Mechanical Equilibrium
Concept of Strain
Concept of Stress
Hook's Law
PROPERTY EVALUATION
Introduction
Nondestructive Tests
Destructive Tests: Measurement of Mechanical Properties
STRESS ANALYSIS
Introduction
Uniaxial State of Stress
Generalized State of Stress
Multiaxial Stress-Strain Relationship
Loading Conditions and Stress
Thermal Stress
Type of Stress Required to Produce Plastic Deformation
Maximum Stresses
Design Stresses
Criterion for the Onset of Plastic Deformation (Yielding)
Stress Concentration
Criteria for Mechanical Failure
Applications: Analysis of Stresses in Specific Components
Solved Problems
MACROSCOPIC ASPECTS OF FRACTURE AND FRACTURE MECHANICS
Definition of Fracture
Objective of Fracture Mechanics
Use of the Terms Brittle and Ductile in Fracture
Crack Loading Modes and Macroscopic Morphology of Fracture Surfaces
Crack Propagation Under a Plane Strain Condition
Crack Propagation Under a Plane Stress Condition
Crack Propagation Under a Mixed State of Plane Strain and Stress
Sequence of Events Leading to Fracture
Classification of Crack Propagation Modes According to Loading Conditions
Variables Affecting Fracture Behavior
Basic Principles of Fracture Mechanics
Linear Elastic Fracture Mechanics (LEFM)
Use of Fracture Mechanics in Design
Concept of Allowable Crack Size
Use of Fracture Mechanics in Failure Analysis
Selection of Materials Resistant to Fracture
STRUCTURE OF ENGINEERING ALLOYS
Introduction
Principles of Thermodynamics
Elements of Internal Structure
Structure of the Atom
Significance of the Electronic Structure of Atom
Electronic Structure and Chemical Properties: Classes of Elements
Origin of Interatomic Binding Forces
Types of Interatomic Binding Forces
Bond Strength and Properties of Materials
Arrangement of Atoms in Perfect Crystals
Understanding the Microscopic Plasticity of Perfect Crystals
Crystal Imperfections
Understanding the Microscopic Plasticity of Real Crystals
Alloy Phases and Phase Change
Equilibrium Phase Diagrams
Methods of Strengthening Engineering Alloys
MATERIALS CHARACTERIZATION
Introduction
Techniques for Microstructural Characterization
Techniques for Chemical Analysis
Microstructural Engineering Alloys
CORROSION
Introduction
Low-Temperature Aqueous Corrosion
High-Temperature Corrosion
METALLURGICAL ASPECTS OF FRACTURE AND FRACTOGRAPHY
Introduction
Microscopic Aspects of Crack Nucleation
Microscopic Mechanisms of Crack Propagation
Fracture Modes and Fractography
FAILURE ANALYSIS PROCEDURE
Introduction
Definition of the Problem
Technical Background
Experimental Program and Analysis
Mode of Failure vs. Cause of Failure
Data Interpretation and Terminology
Recommendations
Failure Analysis Reports
CASE STUDIES
Introduction
Failure of Engineering Alloys Due to Improper Processing Practice
Failure of Engineering Products During Manufacturing
Effect of Variations in Design on Service Performance
Failure of Engineering Products During Service Because of Unanticipated Service Conditions
Failure of Engineering Products During Service Because of Improper Material Selection
Failure of Engineering Products During Service Because of Improper Service Conditions
APPENDIX A: CHEMICAL COMPOSITION AND CLASSIFICATION OF SELECTED STEELS
APPENDIX B: UNITS OF MEASUREMENTS IN MECHANICS
APPENDIX C: MOMENT OF INERTIA OF SELECTED CROSS SECTIONS
INDEX
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Chapter 1. Introduction.
Chapter 2. Stress and Strain in Tension and Compression Within the Elastic Limit. Selection of Cross-sectional Area.
Chapter 3. Experimental Study of Tension and Compression in Various Materials and the Basis of Selecting the Permissible Stresses.
Part II. Complicated Cases of Tension and Compression.
Chapter 4. Design of Statically Indeterminate Systems form Permissible Stresses.
Chapter 5. Account for Dead Weight in Tension and Compression. Design of Flexible Strings.
Chapter 6. Compound Stressed State. Stress and Strain.
Chapter 7. Strength of Materials in Compound Stress.
Part III. Shear and Torsion
Chapter 8. Torsion. Strength and Rigidity of Twisted Bars.
Chapter 9. Torsion. Strength and Rigidity of Twisted Bars.
Part IV. Beading. Strength of Beams.
Chapter 10. Internal Forces in Bending. Shearing-force and Bending-moment Diagrams.
Chapter 11. Determination of Normal Stresses in Bending and Strength of Beams.
Chapter 12. Determination of Moments f Inertia of Plane Figures.
Chapter 13. Shearing and Principal Stresses in Beams.
Chapter 14. Shear Centre. Composite Beams.
Part V. Deformation of Beams due to Bending.
Chapter 15. Analytical Method of Determining Deformations.
Chapter 16. Graph-analytic Method of Calculating Displacement in Bending.
Chapter 17. Non-uniform Beams.
Part VI. Potential Energy. Statically Indeterminate Beams.
Chapter 18. Application of the Concept of Potential Energy in Determining Displacements.
Chapter 19. Statically Indeterminate Beams.
Part VII. Resistance Under Compound Loading.
Chapter 20. Unsymmetric Bending.
Chapter 21. Combined Bending and Tension or Compression.
Chapter 22. Combined Bending and Torsion.
Chapter 23. General Compound Loading.
Chapter 24. Curved Bars.
Chapter 25. Thick-walled and Thin-walled Vessels.
Chapter 26. Design for Permissible Loads. Design for Limiting State.
Part VIII Stability of Elements of Structures.
Chapter 27. Stability of Bars Under Compression.
Chapter 28. More Complicated Questions of Stability in Elements of Structures.
Part IX. Dynamic Action of Forces.
Chapter 29. Effect of Forces of Inertia. Stresses due to Vibrations.
Chapter 30. Stresses Under Impact Loading.
Chapter 31. Strength Check of Materials Under Variable Loading.
Chapter 32. Fundamentals of Creep Analysis.
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This book contains twelve selected papers presented at the ECCOMAS Thematic Conference — Mechanical Response of Composites, and the papers presented by the three plenary speakers.
It describes recent advances in the field of analysis models for the mechanical response of advanced composite materials, ranging from the simulation of the manufacturing process to the inelastic response and collapse of the material. The analysis models are based on recent advances in computational mechanics such as multi-scale modeling, cohesive and partition of unity models.
Content Level » Research
Keywords » composites
Related subjects » Mathematical & Computational Methods - Mechanical Engineering - Mechanics - Special types of Materials
TABLE OF CONTENTS
1 Computational Methods for Debonding in Composites, by René de Borst and Joris J.C. Remmers;
2 Material and Failure Models for Textile Composites, by Raimund Rolfes, Gerald Ernst, Matthias Vogler and Christian Hühne;
3 Practical Challenges in Formulating Virtual Tests for Structural Composites, by Brian N. Cox, S. Mark Spearing and Daniel R. Mumm;
4 Analytical and numerical investigation of the length of the cohesive zone in delaminated composite materials, by Albert Turon, Josep Costa, Pedro P. Camanho and Pere Maimi;
5 Combining elastic brittle damage with plasticity to model the non-linear behavior of fiber reinforced laminates, by Clara Schuecker and Heinz E. Pettermann;
6 Study of delamination in composites by using the serial parallel mixing theory and a damage formulation, by Xavier Martinez, Sergio Oller and Ever Barbero;
7 Interaction Between Intraply and Interply Failure in Laminates, by F.P. van der Meer and L.J. Sluys;
8 A Numerical Material Model for Predicting the High Velocity Impact Behaviour of Polymer Composites, by Lucio Raimondo, Lorenzo Iannucci, Paul Robinson and Silvestre T. Pinho;
9 Progressive Damage Modeling of Composite Materials under both Tensile and Compressive Loading Regimes, by N. Zobeiry, A. Forghani, C. McGregor, R. Vaziri and A. Poursartip;
10 Elastoplastic Modeling of Multi-phase Metal Matrix Composite with Void Growth using the Transformation Field Analysis and Governing Parameter Method, by Ernest T.Y. Ng and Afzal Suleman;
11 Prediction of Mechanical Properties of Composite Materials by Asymptotic Expansion Homogenisation, by J.A. Oliveira, J. Pinho-da-Cruz and F. Teixeira-Dias;
12 On Buckling Optimization of a Wind Turbine Blade, by Erik Lund and Leon S. Johansen;
13 Computation of Effective Stiffness Properties for Textile-Reinforced Composites Using X-FEM, by M. Kastner, G. Haasemann, J. Brummund and V. Ulbricht;
14 Development of Domain Superposition Technique for the Modelling of Woven Fabric Composites, by Wen-Guang Jiang, Stephen R. Hallett and Michael R. Wisnom;
15 Numerical Simulation of Fiber Orientation and Resulting Thermo-elastic Behavior in reinforced Thermo-plastics, by H. Miled, L. Silva. J.F. Agassant and T. Coupez
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