Limit analysis for partial-joint-penetration weld T-joints with arbitrary loading angles

Luo, Pengjun; Asada, Hayato; Tanaka, Tsuyoshi

doi:10.1016/j.engstruct.2020.110459

Cited by 7 publications

(3 citation statements)

References 15 publications

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“…As demonstrated in Figure 23a, the special fillet weld fractured at

15 °

from the anchor rod face, which endorsed the fracture angle proposed analytically by Kamtekar 30 for unequal leg lengths fillet welds with a toe angle of

30 °

. As far as the equivalent standard fillet weld is concerned in Figure 23b, it was found that fracture would occur along an angle of

0 °

from the face of anchor rod, supporting Luo et al's 44 numerical findings, which revealed the same angle for transverse fillet weld with equal legs in T‐joints.…”

Section: Numerical Analysis Using Femsupporting

confidence: 77%

Special all‐round fillet weld for anchor rods of base‐plate T‐stub connections

Ali,

Mirghaderi,

Ghiami Azad

et al. 2023

Structural Design Tall Build

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SummaryThe eccentricity between connected steel parts and the anchor rods in base‐plate T‐stub connections makes base plates the weaker components in tension and compression. Additionally, the oversized holes in base plates lead to irregular placement of anchor rods, resulting in an unsymmetrical shear behavior. Thus, this paper aims to develop a special all‐round fillet weld to connect the anchor rods beneath the base plate concentrically to the steel part, removing the base plate from the load‐transferring chain. Accordingly, design criteria were first developed based on Eurocode's directional method considering all the potential failure modes. Next, results were validated by conducting experimental work. The digital image correlation technique (DIC) was also used to capture the strain distribution developed over the tested specimen till failure. Consequently, numerical analysis was carried out to investigate the fracture strength and the fracture angle and compare the special fillet weld with its equivalent standard one, which has the same weld volume. The results indicated that the proposed design criteria produced safe strength prediction for the developed special all‐round fillet weld. Furthermore, the results revealed that using a special all‐round fillet weld instead of the equivalent standard one can increase the strength by about 8% and improve the ductility of the weld. However, it decreases the stiffness of the weld by about 21%. The fracture surface occurred at from the face of the anchor rod, which produced a higher strength than the predicted tensile strength calculated according to the theoretical throat plane.

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“…As demonstrated in Figure 23a, the special fillet weld fractured at

15 °

from the anchor rod face, which endorsed the fracture angle proposed analytically by Kamtekar 30 for unequal leg lengths fillet welds with a toe angle of

30 °

. As far as the equivalent standard fillet weld is concerned in Figure 23b, it was found that fracture would occur along an angle of

0 °

from the face of anchor rod, supporting Luo et al's 44 numerical findings, which revealed the same angle for transverse fillet weld with equal legs in T‐joints.…”

Section: Numerical Analysis Using Femsupporting

confidence: 77%

Special all‐round fillet weld for anchor rods of base‐plate T‐stub connections

Ali,

Mirghaderi,

Ghiami Azad

et al. 2023

Structural Design Tall Build

View full text Add to dashboard Cite

show abstract

“…In recent years, countries have increasingly considered the development of marine resources, and marine engineering equipment has developed rapidly. As important deep-sea scientific detection equipment, during the service process, deepsea human-occupied vehicles are inevitably damaged due to environmental load effects, fatigue effects, and various adverse factors, including corrosion effects and material ageing, and damage accumulation results in structural failure [1][2][3]. To ensure the safety and reliability of marine scientific engineering equipment such as deep-sea human-occupied vehicles during service, it is necessary to conduct structural health monitoring (SHM).…”

Section: Introductionmentioning

confidence: 99%

Damage detection in thick plate structures based on ultrasonic SH wave

Cui¹,

Li²,

Zhou³

et al. 2022

Smart Mater. Struct.

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Thick plate structures are widely used in large deep-sea scientific detection equipment such as deep-sea human occupied vehicles, but they are prone to local damage caused by fatigue due to the complex working environment load. To prevent structural failure due to damage accumulation, it is necessary to carry out structural health monitoring of thick plate structures. In this paper, two-half-ring thickness-shear d15 mode omnidirectional shear horizontal (SH) wave piezoelectric transducers are used to form an exciter/receiver network and to select the SH2 mode wave packet as the damage location wave packet. Then, the reconstruction algorithm for the probabilistic inspection of damage (RAPID), an algorithm based on the time of guided wave flight, is applied to image damage in a 30 mm thick aluminium plate structure to determine the central location and depth of the damage. Experimental results show that the structural damage detection technique based on SH waves can effectively identify and locate thick plate structural damage and evaluate the damage depth.

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“…High-efficiency simulation methods were proposed based on the shell/3D technique [14], heat source simplification [15], and the inherent strain method [16]. Structural behaviors of T-joints under different loading conditions [17][18][19][20] were simulated, and the influences of welding defects were considered with modern modeling software [21].…”

Section: Introductionmentioning

confidence: 99%

Molten Pool Behaviors in Double-Sided Pulsed GMAW of T-Joint: A Numerical Study

Zhang

Wang

Lin

2021

Metals

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The T-joint is one of the essential types of joints in aluminum welded structures. Double-sided welding is a preferable solution to maintain high efficiency and avoid significant distortion during T-joint welding. However, interactions between double-sided molten pools make flow behaviors complicated during welding. Numerical simulations regarding molten pool behaviors were conducted in this research to understand the complex flow phenomenon. The influences of wire feed rates and torch distances were simulated and discussed. The results show that droplet impinging drives the fluid to flow down to the root and form a frontward vortex. Marangoni stress forces the fluid to form an outward vortex near the molten pool boundary and flatten the concave-shaped molten pool surface. With an increased wire feed speed, the volume of the molten pool increases, and the root fusion is improved. With an increased torch distance, the width of the front molten pool decreases while the length increases, and the rear molten pool size decreases slightly. Both wire feed speeds and the torch distances have limited influences on the basic flow characteristics.

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Limit analysis for partial-joint-penetration weld T-joints with arbitrary loading angles

Cited by 7 publications

References 15 publications

Special all‐round fillet weld for anchor rods of base‐plate T‐stub connections

Special all‐round fillet weld for anchor rods of base‐plate T‐stub connections

Damage detection in thick plate structures based on ultrasonic SH wave

Molten Pool Behaviors in Double-Sided Pulsed GMAW of T-Joint: A Numerical Study

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