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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
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Welding-induced alignment distortion in DIP LD packages: effect of laser welding sequence
SPIE Proceedings, 2002In pigtailing of a single mode fiber to a semiconductor laser for optical communication applications, the tolerance for displacement of the fiber relative to the laser is extremely tight, a submicron movement can often lead to a significant misalignment and thus the reduction in the power coupled into the fiber.
Wenning Liu, Yaomin Lin, Frank G. Shi
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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
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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
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Determination of welding sequence: a neural net approach
Engineering Analysis with Boundary Elements, 1990The problem of determining the welding sequence is one of the problems of combinatorial optimization with multiple objectives. Recently, the technique of solving the Travelling Salesman Problem approximately was proposed which utilizes a neural network.
Shuichi Fukuda, Kan Yoshikawa
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Sequence Effects on Stochastic Fatigue of Welded Joints
Journal of Structural Engineering, 1991The influence of small stress ranges on a recently proposed sequencedependent fatigue damage model is examined. The damage model is capable of including sequence effects by taking into account the interaction of neighboring cycles in predicting the fatigue damage accumulation.
Shahram Sarkani +3 more
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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
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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
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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
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Numerical Simulation of Welding Distortion under Different Sequences
Advanced Materials Research, 2011Finite element software ANSYS was used to study the influence of welding sequences on the distortion generated in the welding process of a Q345 plate with V-groove. The simulation of the welding process consists of sequentially coupled thermal and structural analyses using element birth and death technique.
Yang Liu, Dong Po Wang, Hai Zhang
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Welding Sequence Optimization of TA15 Airplane Wall Panels
Materials Science Forum, 2011TA15 airplane wall panels are used widely in aircraft manufacture, which consist of some reinforced ribs and a motherboard. Therefore, welding sequences of different reinforced ribs directly determine distortion and residual stress distributions of welding wall panels, and then affect the structure service performance. Therefore, it is important to get
Zhi Bo Dong +4 more
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Solidification sequences in stainless steel dissimilar alloy welds
Materials Science and Technology, 1991AbstractA series of laser and gas tungsten arc welds traversing stainless steels of different chemical compositions has been studied, to elucidate the role of austenite or ferrite nucleation and cooling rate on solidification behaviour. It has been found that a steel with a high CrEQ/NiEQ ratio can be induced to solidify as metastable austenite by ...
H. K. D. H. Bhadeshia +2 more
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