Assessment of computational weld mechanics concepts for estimation of residual stresses in welded box structures

Zhu, Jinchao; Khurshid, Mansoor; Barsoum, Zuheir

doi:10.1016/j.prostr.2019.08.094

Cited by 12 publications

(1 citation statement)

References 12 publications

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“…Thus, there is space between weld metal and parent material. This is due to the influence of welding preparation, lack of welding techniques, amperes that are too low or too high, welding speeds too high or too fast, roots are too large (gaps) that are too far away [16], as shown in the Figure 2.…”

Section: Lack Of Fusionmentioning

confidence: 99%

Analysis of structural discipline welding disables in Saudi Aramco project using statistical process control in PT. Mcdermott Indonesia

Sulistyarini¹

2020

IJETER

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It is known that some welding results were defect in the Saudi Aramco project, particularly at the TKY joint and splice joint, thus there is a reparation needed with the specific type of defect which is lack of fusion. The method used is the Pareto diagram, control diagram and fish bone diagram -to find out the graphs and the causes of the resulting structural welding results. The results shown by the pareto diagram state that for an event, about 80% of the effect is caused by 20% of the cause, the type of damage that often occurs in the welding results caused by a lack of fusion is 50%, consisting 23 joints of the 46 joints produced. Meanwhile, from the control chart, all data of the structural welding have been placed at the control limit. Based on the fish bone diagram, some of the causes the lack of fusion defect are because several factors such as human, machine and method, material and environmental factors.

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Section: Lack Of Fusionmentioning

confidence: 99%

Analysis of structural discipline welding disables in Saudi Aramco project using statistical process control in PT. Mcdermott Indonesia

Sulistyarini¹

2020

IJETER

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ANFIS Model for Robotic Welding Process on a Bus Body Structure

Butdee,

Chudjuarjeen

2023

Lecture Notes in Mechanical Engineering

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Fracture mechanics and fatigue life assessment of box-shaped welded structures: FEM analysis and parametric design

et al. 2020

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In this study, Linear Elastic Fracture Mechanics (LEFM) approach is used to evaluate the fatigue strength of a box-shaped welded structure. A parametric study is also undertaken to study the effect of various weld parameters on the fatigue strength, such as lack of weld metal penetration, load position, and plate thicknesses. FRANC3D software was adopted to obtain the stress intensity factor values for two types of full-length and intermediate crack sizes, located at the critical region of the weld of the box-shaped structure. It was concluded that the LEFM approach could capture the crack propagation from the weld root reasonably well under the given conditions and estimate residual fatigue life of the welded structures conservatively. Compared to fatigue life estimations by nominal stress method (1,714,564 cycles) or effective notch stress method (63,385 cycles), the LEFM approach can estimate the residual life more accurately. Especially for intermediate (4 mm) lack of penetration (LOP) of weld metal case (589,198 cycles) in comparison to the experiments (1,216,595 cycles). The parametric study showed that the fatigue life increases with increase in the thickness of flanges, lesser LOP in the weld root, and when load is applied more toward the center of the plate.

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Assessment of computational weld mechanics concepts for estimation of residual stresses in welded box structures

Cited by 12 publications

References 12 publications

Analysis of structural discipline welding disables in Saudi Aramco project using statistical process control in PT. Mcdermott Indonesia

Analysis of structural discipline welding disables in Saudi Aramco project using statistical process control in PT. Mcdermott Indonesia

ANFIS Model for Robotic Welding Process on a Bus Body Structure

Fracture mechanics and fatigue life assessment of box-shaped welded structures: FEM analysis and parametric design

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