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Outline

1. INTRODUCTION TO THE STATIC STRENGTH ANALYSIS OF WELDED JOINTS

•  The structural nature of welded joints
•  Static strength of weldments
•  The customary US/American method (AWS)
•  The IIW/ISO method
•  Simple welded joint analysis
•  The stress flow and load sharing in weldments
•  Optimum shape design and the optimum load capacity of weldments

2. GLOBAL AND LOCAL APPROACHES TO STRESS ANALYSIS IN WELDMENTS

•  Stress distributions in weldments
•  Global and local geometrical effects on stress distribution in weldments
•  The nominal versus the hot spot stress in welded structures
•  Stress concentration factors for weldments
•  Shell FE versus the 3-D FE stress modeling of welded structures
•  Residual stresses in welded structures and weldments

3. FATIGUE STRENGTH OF WELDMENTS

3.1 The nominal stress (S-N) approach
•  Loading in fatigue
•  Cycle counting procedure
•  Definition of stresses in fatigue analysis
•  The nominal versus hot spot stress
•  The standard S - N curves
•  Fatigue damage calculation
•  Geometry effects
•  Misalignment effects

3.2 The local strain ( e - N) approach (outline)

•  The principle of the local strain-life approach
•  Local stress-strain response at the weld toe/root
•  The Neuber and the ESED method
•  Stress concentration in weldments
•  Stress distribution in weldments
•  The hot spot stress and the stress concentration factors
•  Residual stress effects and modeling

3.3. Fracture Mechanics (da/dN - D K) approach

•  Principles of Linear Elastic Fracture Mechanics
•  The stress concentration near cracks
•  The universal stress field near the crack tip
•  The stress intensity factor
•  The critical crack dimensions and the fracture toughness
•  Calculation of stress intensity factors - handbooks, superposition, weight functions, numerical methods

3.4 Fatigue crack growth analysis

•  Fatigue crack growth equations
•  Integration of fatigue crack growth expressions
•  The effect of the initial crack size
•  The effect of the weld geometry
•  Residual stress effect

4. SIMPLE FATIGUE STRENGTH IMPROVEMENT METHODS FOR WELDMENTS

•  Reduction of stress concentration
•  Reduction of nominal stress
•  Stiffness effects
•  Local and global geometry improvements
•  Macroscopic and microscopic analysis of failures

5 . SOFTWARE TOOLS AND WEBSITES – SUMMARY

Presenter

Dr. Grzegorz Glinka - Mechanical and Mechatronics Engineering Professor - Univeristy of Waterloo

Dr. Glinka has been with the University of Waterloo since 1989. He has also lectured at the University of Metz, France and at the University College London, England. He holds a PhD and DSc from the Warsaw University of Technology. Dr. Glinka is a specialist in fracture and fatigue of steel structures. As well, he has acted as a United Nations expert. His research interests include fracture of materials, fatigue of structures, multiaxial fatigue and creep of engineering materials, computer aided design, and FEM-elastic-plastic stress-strain analysis. Dr. Glinka has published over 100 articles in technical journals and textbooks.

What Previous Participants have said about this Seminar:

• "He was great. Very knowledgeable. "
• "Very good instructor."
• "Good balance of theory and humor."

APEGBC is an AIBC/CES registered provider offering an AIBC-Accredited activity for 6.5 Non-Core Learning Units.