Fracture assessment of seam and seamless steel pipes by application of the ring-shaped bending specimens

Musrati, Walid; Medjo, Bojan; Gubeljak, Nenad; Štefane, Primož; Veljić, Darko; Sedmak, Aleksandar; Rakin, Marko

doi:10.1016/j.tafmec.2019.102302

Cited by 8 publications

(4 citation statements)

References 28 publications

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“…Triaxiality at the bottom of the pipe notch is generally in the range between NT10 and RT specimen, hence it can be said that the stress concentration is weakly pronounced, Figure 17b. Application of the CGM on the example of a welded structure -thin-walled seam pipe, is shown in [90] by the authors of this paper. Actually, fracture assessment is performed on the non-standard pipe ring notched specimens, proposed as testing geometry for characterisation of the pipeline materials, [91][92][93].…”

Section: Application Of Micromechanical Models In Fracture Analysis Of Welded Structuresmentioning

confidence: 96%

“…The fracture resistance of the weld metal turned out to be lower in comparison with the base metal, Figure 18b. Seamless pipes were also considered in [90], and they generally showed better fracture resistance in comparison with the seam ones for the considered material (pressure vessel steel) and dimensions.…”

Section: Application Of Micromechanical Models In Fracture Analysis Of Welded Structuresmentioning

confidence: 99%

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An overview of application of micromechanical models in ductile fracture analysis of welded joints

Rakin

Medjo

Gubeljak

et al. 2020

Theor appl mech (Belgr)

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Fracture of welded joints has been an important research and industrial topic for a long time, having in mind the key role of welded joints in ensuring the safe operation and integrity of welded structures. This work contains an overview of application of micromechanical models to ductile fracture of welded joints. The main benefit of these models, in comparison with the classical fracture mechanics approach, is consideration of the local quantities (stress and strain) in prediction of damage development. The damage is quantified through the value of the damage parameter, which is typically related to the void nucleation, growth and coalescence for ductile fracture of metallic materials, i.e. the description of the material can be related to the actual material behaviour during fracture. Most of the presented studies, including those published by the present authors, are performed on steel as the base material, and the rest deal with aluminium alloys.

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Section: Application Of Micromechanical Models In Fracture Analysis Of Welded Structuresmentioning

confidence: 96%

Section: Application Of Micromechanical Models In Fracture Analysis Of Welded Structuresmentioning

confidence: 99%

An overview of application of micromechanical models in ductile fracture analysis of welded joints

Rakin

Medjo

Gubeljak

et al. 2020

Theor appl mech (Belgr)

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“…At present, the testing methods for welding quality can be divided into two categories: destructive testing [7][8][9] and non-destructive testing. Destructive tests include tensile tests, bending tests, and impact tests.…”

Section: Introductionmentioning

confidence: 99%

A New Method for Detecting Weld Stability Based on Color Digital Holography

Li,

He,

Xia

et al. 2024

Applied Sciences

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Weld stability is directly related to the safety and reliability of engineering, and continuous improvement of its detection technology has great research significance. This paper presents a novel method for weld stability detection based on color digital holography. A color digital holography optical path was designed to capture the holograms of welds under varying loads. Several common denoising algorithms were used to deal with speckle noise in the wrapped phase, among which the 4-f optical simulation integrated cycle-consistent generative adversarial network (4f-CycleGAN) denoising algorithm based on deep learning was more suitable for the color digital holographic detection system. The three-dimensional deformation fields of three samples (lap-jointed, butt-jointed, and defective butt-jointed aluminum alloy plates) under different loads were calculated. The center profile of the deformation field in the direction of load and holographic reconstruction images are used to determine the position of the weld. The coefficient of variation near the weld was used to evaluate the weld stability. The coefficient of variation for lap-jointed, butt-jointed and defective butt-jointed plates are 0.0335 (<0.36, good stability), 0.1240 (<0.36, good stability) and 0.3965 (>0.36, poor stability), respectively. The research results of this paper provide a new strategy for detecting weld stability.

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“…New topics and new methods have been investigated with promising results including brittle-ductile transition, anisotropy, nonproportional, thermomechanical and dynamic loadings [17][18][19]. Applications have been developed for pressure pipelines, including pipe ring specimen testing and numerical simulation [20][21][22][23][24], steam turbines [25][26][27][28] and welded joints [10-13, 29, 30]. Initially developed in the context of steel structures, e.g.…”

Section: Introductionmentioning

confidence: 99%

Micromechanical modelling of ductile fracture – local approach

et al. 2020

Self Cite

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Micromechanical modelling of ductile fracture by using the local approach has been presented as the review of previously obtained results for welded joints made of low alloyed high strength steel. Experimental work was performed on 3PB specimens and tensile panels, which were then modelled by finite element method, using two- and three-dimensional meshes, respectively. The local approach was used to simulate both for crack initiation and growth during ductile fracture process.

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Fracture assessment of seam and seamless steel pipes by application of the ring-shaped bending specimens

Cited by 8 publications

References 28 publications

An overview of application of micromechanical models in ductile fracture analysis of welded joints

An overview of application of micromechanical models in ductile fracture analysis of welded joints

A New Method for Detecting Weld Stability Based on Color Digital Holography

Micromechanical modelling of ductile fracture – local approach

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