Residual Stress and Its Effects on Fatigue and Fracture

Simplified fracture mechanics based assessment methods are widely used by the industry to determine the structural integrity significance of postulated cracks, manufacturing flaws, service-induced cracking or suspected degradation of engineering components under normal and abnormal service loads. In many cases, welded joints are the regions most likely to contain original fabrication defects or cracks initiating and growing during service operation. Various procedures provide upper bound residual stress profiles for various classes of welded joints that can be used in fracture assessments, but these often give very conservative results. Recently, the option to use more realistic profiles has been adopted, but only where such profiles are based on finite element residual stress simulations supported by detailed residual stress measurements. Rapid advances in the capability of residual stress measurement techniques, such as the contour and deep hole drilling techniques as well as the neutron and synchrotron X-ray diffraction methods, now readily allow residual stresses and strains to be mapped on defined planes within a structure. The contents of this book have been grouped into three topic areas covering theoretical /numerical and experimental analyses of residual stress and its effects on fatigue and fracture.

Effects of residual stress on fatigue and fracture is an open key problem for structural integrity Contains recent advances on its title topics by leading European experts Contains theoretical/numerical studies of high value backed by sound experimental data Contains experimental studies based on novel and verifiable testing methods

Inhalt
Residual Stress Analysis by Modelling Techniques.- Residual Stress Numerical Simulation Of Two Dissimilar Metal Weld Junctions.- Finite Element Simulation Of Welding In Pipes: A Sensitivity Analysis.- Residual Stress Prediction In Letterbox-Type Repair Welds.- Viscosity Effect On Displacements And Residual Stresses Of A Two-Pass Welding Plate.- Residual Stress Analysis by Experimental Methods.- Evaluation Of Novel Post Weld Heat Treatment In Ferritic Steel Repair Welds Based On Neutron Diffraction.- High-Resolution Neutron Diffraction For Residual Strain/Stress Investigations.- Effects Of The Cryogenic Wire Brushing On The Surface Integrity And The Fatigue Life Improvements Of The Aisi 304 Stainless Steel Ground Components.- Surface Integrity In High Speed Machining Of Alloy.- The present and the new HFR-Petten SANS facility.- Residual Stress Analysis by Modelling Techniques.- Sensitivity of Predicted Residual Stresses To Modelling Assumptions.- Welding Effects On Thin Stiffened Panels.- Evaluation of Residual Stresses in Ceramic and Polymer Matrix Composites Using Finite Element Method.- Phase Transformation And Damage Elastoplastic Multiphase Model For Welding Simulation.- Residual Stress Effects on Fatigue and Fracture.- Identification of Residual Stress Length Scales in Welds for Fracture Assessment.- Interaction of Residual Stress with Mechanical Loading in a Ferritic Steel.- Effects of Residual Stresses on Crack Growth in Aluminum Alloys.- Effect of Reflection Shot peening and Fine Grain Size on Improvement of Fatigue Strength for Metal Bellows.- Surface Crack Development In Transformation Induced Fatigue Of Sma Actuators.- Assessment of Defects Under Combined Primary and Residual Stresses.