Welded High Strength Steel Structures

Offers valuable insights, analysis and a clear understanding of the impact of residual stress on mechanical behavior of high strength steel joints.

Autorentext
Dr. Jin Jiang is Senior Researcher of Civil Engineering at Nanyang Technological University, Singapore. He also serves as associate director of complex steel structure research center of Guangdong province, China. He was previously served as research engineer at Keppel Offshore & Marine Technology Center (KOMTech). He is a technical assessor of Singapore Accreditation Council (SAC). He is a member of American Society of Civil Engineers (ASCE) and Singapore Structural Steel Society.

Klappentext

Welded High Strength Steel Structures Understand the impact of fatigue on high strength steel joints with this comprehensive overview High strength steels are highly sought after for industrial and engineering applications ranging from armored vehicles to welded engineering components built to withstand considerable stress. The mechanical properties of welded joints made from high strength steel are integrally linked to the specific welding process, which can have an enormous impact on fatigue performance. Welded High Strength Steel Structures: Welding Effects and Fatigue Performance provides a comprehensive analysis of high strength steel joints and the ramifications of the welding process. It guides readers through the process of performing thermal analysis of high strength steel structures and evaluate fatigue performance in the face of residual stress. The result is a volume with innumerable use cases in engineering and manufacture. Welded High Strength Steel Structures readers will also find:

• An author with decades of experience in research and engineering
• Numerous studies of various classes of high strength steel joints

• Studies on tubular structures for welding residual stress Welded High Strength Steel Structures is a must-own for welding specialists, materials scientists, mechanical engineers, and researchers or industry professionals in related fields.

  Inhalt
  INTRODUCTION
  1.1 Research Background
  1.2 Objectives and Scope
  1.3 Contributions and Originality
  1.4 Organization
  LITERATURE REVIEW
  2.1 High Strength Steel (HSS)
  2.1.1 Overview
  2.1.2 Delivery Condition of HSS
  2.1.3 Fatigue and Fracture of HSS
  2.1.4 Codes and Standards of HSS application
  2.2 Welding and Residual Stress
  2.2.1 Overview of Arc-Welding
  2.2.2 Weldability of Steel
  2.2.3 Phase Transformation and Other Phenomenon in Welding Procedure
  2.2.4 The Formation of Residual Stress
  2.2.5 Residual Stress Investigation Techniques
  2.2.6 Exploration on Residual Stress Effects
  2.3 Fatigue Analysis of Tubular Joints
  2.3.1 Classification and Parameters of Tubular Joints
  2.3.2 Stress Analysis of Intact Tubular Joint
  EXPERIMENTAL INVESTIGATION OF RESIDUAL STRESS FOR HIGH STRENGTH STEEL PLATE-TO-PLATE JOINTS
  3.1 Introduction
  3.2 The Hole-Drilling Method and Specimen Details
  3.2.1 The ASTM hole-drilling method
  3.2.2 Specimen Specifications
  3.2.3 Welding Specification
  3.3 Residual Stress Investigation
  3.3.1 Setup and Modification of the Hole-Drilling Guide
  3.3.2 Strain Gauge Locations
  3.3.3 Calibration Test for Residual Stress Measurement
  3.3.4 Residual Stress Measurement Procedure
  3.3.5 Cutting of Brace Plate
  3.4 Experimental Results
  3.4.1 Distribution of Residual Stress Along the Weld Toe
  3.4.2 The Effects of Preheating
  3.4.3 The Effects of Joint Angle
  3.4.4 The Effects of Plate Thickness
  3.4.5 The Effects of Brace Plate Cutting
  3.5 Static Tensile Testing
  3.5.1 Testing Rig
  3.5.2 Strain Gauge Locations
  3.5.3 Testing Procedure
  3.5.4 Testing Results
  3.6 The Influence of Residual Stress on SCF Value
  3.6.1 Analysis method
  3.6.2 Results and Conclusions
  3.7 Conclusion and Summary
  NUMERICAL STUDY OF RESIDUAL STRESS FOR HIGH STRENGTH STEEL PLATE-TO-PLATE JOINTS
  4.1 Introduction
  4.2 Modelling Procedure and Results For 2d Models
  4.2.1 Overview
  4.2.2 The Lumped Technique
  4.2.3 Weld Filler Addition Technique
  4.2.4 Heat Transfer Analysis
  4.2.5 Mechanical Analysis
  4.2.6 Model Validation and Results
  4.3 MODELLING PROCEDURE AND RESULTS FOR 3D MODELS
  4.3.1 Overview
  4.3.2 Heat Source
  4.3.3 Modeling for the Weld Filler Adding Process
  4.3.4 Modeling Validation
  4.3.5 Modeling Results
  4.4 PARAMETRIC STUDY
  4.4.1 Effect of Boundary Condition
  4.4.2 Effect of Preheating Temperature
  4.4.3 Effect of Using Different Lumps
  4.4.4 Effect of Welding Speed
  4.4.5 Effect of Welding Sequence
  4.5 Conclusions
  EXPERIMENTAL INVESTIGATION OF RESIDUAL STRESS FOR WELDED BOX HIGH STRENGTH STEEL T JOINTS
  5.1 Introduction
  5.2 Experimental Investigation
  5.2.1 Material Properties
  5.2.2 Specimen Fabrication
  5.2.3 Test Setup and Procedure
  5.2.4 Strain Gauge Schemes for Residual Stress Measurement
  5.2.5 Computation of Residual Stress
  5.3 Testing Results
  5.3.1 Preheating Specimen
  5.3.2 Ambient Temperature Specimen
  5.4 Analyses and Discussion
  5.4.1 Preheating Effect
  5.4.2 Chord Edge Effect
  5.4.3 Corner Effect
  5.4.4 Stress Variation in Depths
  5.5 Conclusions
  NUMERICAL STUDY OF RESIDUAL STRESS FOR WELDED HIGH STRENGTH STEEL BOX T/Y JOINTS
  6.1 Introduction
  6.2 Modeling Procedure
  6.2.1 Overview
  6.2.2 Heat Source Model
  6.2.3 Thermal Interactions
  6.2.4 Arc Touch Moving
  6.2.5 Modeling Summary
  6.3 Modeling of Pure Heat Transfer
  6.4 Fully Coupled Residual Stress Analysis
  6.4.1 Modeling Validation
  6.4.2 Modeling Results
  6.5 Parametric Study
  6.5.1 Range of The Modeling
  6.5.2 Variation of The Residual Stress with Respect to Joint Angle
  6.5.3 Variation of The Residual Stress with Respect To B/C (Ratio of Brace Width to Chord Width)
  6.5.4 Variation of The Residual Stress with Respect to Welding Speed
  6.6 Conclusions
  STRESS CONCENTRATION FACTOR OF WELDED BOX HIGH STRENGTH STEEL T JOINT
  7.1 Introduction
  7.2 Test Setup and Specimens
  7.3 Strain Gauge Schemes
  7.4 Test Procedure
  7.5 Test Results
  7.6 Comparison of Test Results with Cidect Guide
  7.7 Effect of Residual Stress on SCF
  7.8 Conclusion
  CONCLUSION AND RECOMMENDATION
  8.1 Introduction
  8.2 Conclusions
  8.2.1 Experimental Studies
  8.2.2 Numerical Modelling
  8.3 Recommendations for Further Research Works
  APPENDIX 1
  APPENDIX 2
  APPENDIX 3
  APPENDIX 4
  APPENDIX 5