The development and validation of a dynamic fracture propagation model for gas transmission pipelines

O’Donoghue, P.E.; Kanninen, M. F.; Leung, C.P.; Demofonti, G.; Venzi, S.

doi:10.1016/s0308-0161(96)00012-9

Cited by 82 publications

(54 citation statements)

References 25 publications

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“…The fracture toughness is determined by the amount of the work of plastic deformation in the fracture zone, which depends on the type of the microstructure formed during thermomechanical processing of the initial hot-rolled sheet [24][25][26]. Unlike other steels, the pipeline steels have a well-defined ratio of strength, ductility and fracture toughness, which is specified by the thermomechanical processing scheme [27][28][29]. The simulation results of this study were verified for 17Mn1Si pipe steel because of its widespread use.…”

Section: Introductionmentioning

confidence: 73%

“…It is therefore very important to optimize the grain sizes and analyze the mechanical behavior of grains under dynamic loads. Based on pneumatic test results, it was found that the high fracture toughness (or the ability to terminate a prolonged ductile crack) is governed by the volume and intensity of plastic deformation in front of the growing crack [27][28][29]. At the stage of stable ductile crack growth, the volume of plastically deformed metal in front of the crack tip depends on the dimensions of structural elements of the material.…”

Section: Introductionmentioning

confidence: 99%

“…The larger is the metal volume at the growing crack tip, which is involved in plastic deformation resistance, the higher the fracture energy is and the shorter the fracture length is in a real oil or gas pipeline. In laboratory conditions, these characteristics are usually evaluated in the first approximation based on impact toughness [23,28,29].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Structural Heterogeneity of 17Mn1Si Steel on the Temperature Dependence of Impact Deformation and Fracture

Моисеенко

Maruschak

Panin

et al. 2017

Metals

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Abstract:The paper deals with a theoretical and experimental study of the relationship between the microstructural parameters, mechanical properties, and impact deformation and fracture of steels using the example of 17Mn1Si pipe steel. A model for the behavior of a polycrystalline grain conglomerate under impact loading at different temperatures was proposed within a cellular automata framework. It was shown that the intensity of dissipation processes explicitly depends on temperature and these processes play an important role in stress relaxation at the boundaries of structural elements. The Experimental study reveals the relationship between pendulum impact test temperature and the deformation/fracture energy of the steel. The impact toughness was shown to decrease almost linearly with the decreasing test temperature, which agrees with the fractographic analysis data confirming the increase in the fraction of brittle fracture in this case. It was shown with the aid of the proposed model and numerical simulations that the use of the excitable cellular automata method and an explicit account of test temperature through the possibility of energy release at internal interfaces help to explain the experimentally observed features of impact failure at different temperatures.

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Section: Introductionmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Structural Heterogeneity of 17Mn1Si Steel on the Temperature Dependence of Impact Deformation and Fracture

Моисеенко

Maruschak

Panin

et al. 2017

Metals

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“…As a matter of fact, after starting, the crack might propagate at an almost stable speed or might gradually decelerate until arrest, according to the general characteristics and ductile properties of the steel used [1,2].…”

Section: Introductionmentioning

confidence: 99%

Effect of fracture tunneling in DWT Tests

Marotta

Minotti

Salvini

2012

Engineering Fracture Mechanics

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a b s t r a c tThe work deals with the effective shape of the fracture during a Drop Weight Tear Test (DWT). An inexpensive technique, able to determine the geometrical shape of the fracture, is discussed and presented. The technique is capable to perform reliable measurements and offers a mathematical description of the fracture profile. In few words, the fracture tunneling measurement and its correlated effects are the objectives of this work. The technique is based on a copy of the fracture by a silicone mold, followed by a digital analysis of the tomographic images. The attention is finally focused on two different steels used in inshore gas piping. The tunneling measurement is exploited in a finite element simulation of the fracture propagation, thus opening the opportunity to update the kinematic models applied for Crack Tip Opening Angle assessment.

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“…The CTOA, which has been introduced particularly for describing crack extension in metal sheets [3,4], is used as the characteristic parameter in crack propagation analyses where the crack extension itself is realised by a node release technique. The advantage of this model is that it has only a single parameter, the critical CTOA ψ c , to model the fracture process, which can be determined by experiments [5].…”

Section: Introductionmentioning

confidence: 99%

Crack propagation analyses with CTOA and cohesive model: Comparison and experimental validation

Scheider¹,

Schödel²,

Brocks³

et al. 2006

Engineering Fracture Mechanics

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Two numerical crack propagation models, namely the cohesive model and the CTOA model, are compared regarding their ability to predict the crack propagation behaviour of fracture specimens made of thin walled Aluminium sheets, which can be simulated using plane stress assumption. The experimental database is presented and it is shown, how the various quantities are measured by different techniques (optically and with various clip gauges). It is explained how the respective parameters for the numerical models are determined by use of a selected set of fracture specimens. Other types of specimens are then used to validate the simulations with these parameters. In order to investigate the behaviour of the models under different constraint conditions and the transferability of their parameters, C(T) specimens are used for parameter evaluation and M(T) specimens for validation. It is shown that for all types of specimens, a single set of parameters can be used for both models.

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The development and validation of a dynamic fracture propagation model for gas transmission pipelines

Cited by 82 publications

References 25 publications

Effect of Structural Heterogeneity of 17Mn1Si Steel on the Temperature Dependence of Impact Deformation and Fracture

Effect of Structural Heterogeneity of 17Mn1Si Steel on the Temperature Dependence of Impact Deformation and Fracture

Effect of fracture tunneling in DWT Tests

Crack propagation analyses with CTOA and cohesive model: Comparison and experimental validation

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