... Abstract Framatome and EDF have launched an important R&D program which aims at evaluating the effective impact of residual stresses on the fracture initiation in the brittle-to-ductile transition regime, on vessel low alloy steel plates including a surface defect. The test program...

... Abstract Framatome and EDF have launched an important R&D program which aims at evaluating the effective impact of residual stresses on the fracture initiation in the brittle-to-ductile transition regime, on vessel low alloy steel plates. The paper presented here deals with the process...

... Abstract Autofrettage of pipes or pressure vessels for high pressure applications is a common and well-known procedure to extend the fatigue life by introducing a compressive residual stress at the inner fiber, see, e.g., [1,2]. In general, applying autofrettage to a high-pressure component...

... Abstract For many years now, FRAMATOME has used the numerical welding simulation for a better understanding of the phenomena involved during manufacturing process [1][2][3][4][5]. Numerical simulation allows a better understanding and predictions of the distortions and residual stresses induced...

... study on a plate-to-plate weld and on a nozzle-to-plate weld, created as ad-hoc mock-ups. Experimental residual stresses are collected by an X-ray diffractometer in the as welded configurations. These values are used to validate a complex 3D numerical model, implemented with the finite element software...

... of Manchester , UK Tecnatom , Spain Vattenfall , Sweden (WP6 leader) VTT , Finland ORNL , USA NIKIET , Russia Ductile tearing fracture mechanics assessment LBB local approach model residual stresses dissimilar metal welds 1 Copyright © 2013 by ASME EUROPEAN PROJECT ON STRUCTURAL...

... Finite Element Welding Simulation Welding Nickel based alloy Stress corrosion cracking Residual stresses PWR Simplified method The integrity of structures in nuclear power plants has to be assessed to meet given safety criteria. For a better understanding of the in-service loads...

... Welding is a reliable and efficient joining process in which the coalescence of metals is achieved by fusion. Welding is carried out with a very complex thermal cycle which results in irreversible elastic-plastic deformation and residual stresses in and around fusion zone and heat affected zone...

... Residual stresses and distortion of welded structures have a significant influence on their functionality and their lifetime. In Pressurized Water Reactor (PWR) piping systems, residual stresses in dissimilar metal welds extensively increase their susceptibility to primary water stress corrosion...

... will be identified. The range of assessment tools considered will include those for assessment of component failure by advanced fracture mechanics analyses validated on small and large scale experiments, quantification of weld residual stresses by numerical analysis and by measurements, stress corrosion crack...

... to the residual stresses in and around fusion zone and heat affected zone (HAZ). Presence of residual stresses may be beneficial or harmful for the structural components depending on the nature and magnitude of stresses. The beneficial effect of compressive stresses have been widely used in industry...

... modeling NDE database nuclear power plants nuclear safety petro-chemical plants PRAISE probabilistic fracture mechanics PD-UP PYTHON residual stresses risk-informed analysis statistical analysis uncertainty analysis 1 Copyright © 2009 by ASME Proceedings of PVP2009 2009 ASME Pressure Vessels...

... 1 Copyright © 2009 by ASME Proceedings of PVP2009 2009 ASME Pressure Vessels and Piping Division Conference July 26-30, 2009, Prague, Czech Republic PVP 2009-77243 NUMERICAL ANALYSES OF RESIDUAL STRESS FIELDS IN WELDED COMPONENTS Dieter Siegele Fraunhofer-Institute for Mechanics of Materials...

... Numerical welding simulation residual stresses stress corrosion cracking The numerical welding simulation has developed very rapidly during the last few years. The problem complexity has increased from simple 2D axis-symmetric or cross-section models to full 3D models, which can describe...

... (SEM) confirmed that this was a thicker browner oxide but localized corrosion was not observed. After removing the securing bolt, all six specimens showed a spring back phenomenon, clearly confirming that residual stresses were present in the deformed material even after more than 6 years of exposure...

.... On the other hand, due to the cladding process and the difference of the thermal expansion coefficient of the austenitic cladding and the ferritic base material residual stresses act in the component. This residual stress field is important for assessing crack postulates in the cladding or subclad flaws...

... 15 08 2008 This paper concerns the limit state and residual stress assessment in the thin shell structures submitted to cyclic loading. A simplified analysis has been proposed by J. Zarka in order to predict the nature of this limit state. This method is computed with a standard...

... optimization and appropriate modeling. residual stresses repair weld FEM RPV PVP-Vol. 479, Residual Stress, Fracture, and Stress Corrosion Cracking July 25-29, 2004, San Diego, California USA PVP2004-2656 NUMERICAL SIMULATIONS OF RESIDUAL STRESSES IN REPAIR WELDED CLAD STRUCTURES Hieronymus Hein...

... Nondestructive measurement ultrasonic measurement subsurface wave acoustoelastic coefficient residual stresses microstructure welded plate Welding, which is a largely used process in the mechanical manufacturing, is one of the causes of high-level residual stresses. The level...

... the repair welds carried out on clad plates with an anticipated sub-clad defect including the results from various residual stress measurements and from numerical welding simulations as well as from some fracture mechanical calculations. The results are discussed with respect to support the repair weld...