Results 251 to 260 of about 1,781,818 (285)
Some of the next articles are maybe not open access.
Impact of Welding Sequence on the CRDM Nozzle-to-Vessel Weld Stress Analysis
Flaw Evaluation, Service Experience, and Materials for Hydrogen Service, 2004A three-dimensional finite element model is presented to simulate the welding process of the side-hill control-rod-drive-mechanism (CRDM) nozzle to the vessel head. Emphasis is given to how the weld is laid out in the analysis so that accurate residual stress results can be obtained while the required computing time is viable.
Yaoshan Chen +2 more
openaire +1 more source
Decreasing welding distortions in penetration nozzles by applying proper welding sequences
Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, 2012Welding distortions cause problems in assembly and performance of weldments, including nozzles in pressure vessels. In the present work, a three-dimensional thermo-mechanical finite element model was expanded to study the effect of the welding sequence on welding distortions in a pressurized nozzle.
Mohammad Najafi +2 more
openaire +1 more source
A study on the effect of welding sequence on welding distortion in ship deck structure
Ships and Offshore Structures, 2019In this paper, a numerical simulation based on finite element method is presented to study the effect of welding sequences on the magnitude and shape of distortion when welding several flat-bar sti...
Navid Azad +2 more
openaire +1 more source
Effect of welding sequence and direction on angular distortions in butt-welded plates
The Journal of Strain Analysis for Engineering Design, 2011During arc welding process, non-uniform heating and cooling lead to non-uniform expansion and contraction of the weld and surrounding base metal which result in undesirable residual stresses and distortions in the welded joint. Among different types of welding distortions, angular distortions produced by butt welding of plates are of major concern in ...
Mahsa Seyyedian Choobi +2 more
openaire +1 more source
Modelling of Welding Sequences for Minimization of Weld-Induced Distortions and Residual Stresses
2019In this work, thermal elastic–plastic analysis (TEPA) has been performed to analyse the fillet welded joint to minimize the weld-induced residual stresses and distortions. Various possible welding sequences, considering the start and end positions of the heat source along with their directions of motion, were decided. Those sequences were simulated and
Saurav Suman +5 more
openaire +1 more source
Applied Mechanics and Materials, 2012
Based on the classical theory of welding structure, the welding residual distortion for laser welded sandwich structure was simulated using finite element method(FEM). The results showed that welding front all and then to back may lead to a relatively high welding residual distortion. The maximum distortion in Z-direction is higher than 0.5mm.
Shu Ling Chen, Song Lin Yang
openaire +1 more source
Based on the classical theory of welding structure, the welding residual distortion for laser welded sandwich structure was simulated using finite element method(FEM). The results showed that welding front all and then to back may lead to a relatively high welding residual distortion. The maximum distortion in Z-direction is higher than 0.5mm.
Shu Ling Chen, Song Lin Yang
openaire +1 more source
Transactions of the Indian Institute of Metals, 2019
Weld distortion is a major issue in splice joint to get a perfect contact between mating parts. The hole in the bolted spliced joints of boiler structure may get dislocated due to error in process. The bolt hole is to be plug-welded for critical applications.
N. Ramasamy +3 more
openaire +1 more source
Weld distortion is a major issue in splice joint to get a perfect contact between mating parts. The hole in the bolted spliced joints of boiler structure may get dislocated due to error in process. The bolt hole is to be plug-welded for critical applications.
N. Ramasamy +3 more
openaire +1 more source
Volume 6: Materials and Fabrication, Parts A and B, 2009
Weld overlays have been used to repair or mitigate stress corrosion cracking (SCC) in both boiling water reactor (BWR) and pressurized water reactor (PWR) nozzle-to-pipe dissimilar metal welds (DMW). One of the contributing factors to SCC is the high tensile residual stresses produced during the fabrication of the original butt weld, especially when ...
Francis H. Ku +5 more
openaire +1 more source
Weld overlays have been used to repair or mitigate stress corrosion cracking (SCC) in both boiling water reactor (BWR) and pressurized water reactor (PWR) nozzle-to-pipe dissimilar metal welds (DMW). One of the contributing factors to SCC is the high tensile residual stresses produced during the fabrication of the original butt weld, especially when ...
Francis H. Ku +5 more
openaire +1 more source
Numerical investigation of the thermal fields due to the welding sequences of butt-welds
2014Bachorski et al. (1999) developed a linear elastic finite-element modelling technique to predict postweld distortion.Biswas et al. (2007) conducted a three dimensional finite element analysis of transient thermal history and residual deformation due to line heating.
openaire +1 more source