Day 1

08.30-12.00
Introduction

Presentation of the course and the lecturers, Jack Samuelsson

Fatigue of welded structures and components

Jack Samuelsson, Zuheir Barsoum

Fatigue design – an overview

Stress concentrations and stress raisers

Weld defects

Welding residual stresses

Fatigue design methods

1. Nominal stress method
2. Geometric hot spot/structural stress method
3. Effective noth stress method
4. Linear Elastic Fracture Mechanics (LEFM)
   -Effect of R-rati

13.00-17.30

Fatigue of welded structures and components, contd.

Multiaxial fatigue

Residural stress relaxation

Post Weld Improvment Techniques (PWIT)

Overview

Exercise/Computer lab

Introduction to the effective notch stress method; Fatigue design of a cruciform joint.

Discussion

Day 2

08.00-12.00

Weld Quality/Class system

Overview

Assessment of lack of fusion defects

Assessment of cold lap defects

Assessment of pores

Assessment of undercut defects

Assessment of weld root defects

FE-modelling

Boundary conditions

Submodelling techniques

Modell accuracy

Nonlinearity

Effect of 3D-modelling

Discussion

13.00-16.00

Exercise/Computer lab 2

Fatigue life analysis of a T-joint fillet weld using fracture mechanics; Weight function software AF-grow

Exercise/Computer lab

Hot spot structural stress method and effective notch stress method; Fatigue life analysis of a 45-degree butt weld joint

Handout of home assignments (optional)
Short description

Summary – end of course