Fracture response of pipelines subjected to large plastic deformation under tension

O̸stby, Erling; Jayadevan, K.R.; Thaulow, Christian

doi:10.1016/j.ijpvp.2004.04.005

Cited by 101 publications

(53 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They key effect of internal pressure is that it stabilises the tube and usually pushes bifurcation buckling into the plastic material range. In particular, Jayadevan et al [46] and Østby et al [47] studied the large plastic deformation behaviour of very thick tubes with R/t = 10 under tension and bending respectively in the context of the fracture response of pipelines using the reduced-integration second order ABAQUS C3D20R solid continuum element and an isotropic power-law strain hardening material model. Further, Corona et al [48] applied the fully-integrated second order ABAQUS C3D27 solid continuum element to model thick tubes with R/t ≈ 18 under bending using an elastic-plastic Ramberg-Osgood [49] The present paper is an attempt to provide rigorous numerical evidence to aid in the selection of an appropriate finite element by comparing the predicted nonlinear plastic buckling behaviours of thick and thin tubes under global bending when modelled using several solid continuum finite elements and several shell elements.…”

Section: Finite Element Modelling Of Thick Shells Under Global Bendingmentioning

confidence: 99%

See 1 more Smart Citation

Solid or shell finite elements to model thick cylindrical tubes and shells under global bending

Sadowski¹,

Rotter²

2013

International Journal of Mechanical Sciences

View full text Add to dashboard Cite

This paper explores the use of solid continuum finite elements and shell finite elements in the modelling of the nonlinear plastic buckling behaviour of cylindrical metal tubes and shells under global bending. The assumptions of shell analysis become increasingly uncertain as the ratio of the radius of curvature to the thickness becomes smaller, but the classical literature does not draw a clear line to define when a shell treatment is inappropriate and a continuum model becomes essential. This is a particularly important question for the bending of tubular members, pipelines, chimneys, piles, towers and similar structures. This study is therefore concerned solely with the uniform bending of thin tubes or thick shells which fail by plastic buckling well into the strain-hardening range. The analyses employ finite element formulations available in the commercial software ABAQUS because this is the most widely used tool for parametric research studies in this domain with an extensive and diverse element library. The results are of general validity and are applicable to other finite element implementations. This paper thus seeks to determine the adequacy of a thin or thick shell approximation, taking into account geometric nonlinearity, complex equilibrium paths, limit points and bifurcation buckling, extensive material ductility and linear strain hardening. It aims to establish when it is viable to employ shell elements and when this decision will lead to outcomes that lack sufficient precision for engineering design purposes. Sciences, 74, 143-153. DOI: http://dx.doi.org/10.1016/j.ijmecsci.2013 continuum elements to model tubes in bending is found to become increasingly uneconomical as the R/t ratio rises above 25 with reduced advantages over shell elements, both in terms of the accuracy of the solution and the computation time.

show abstract

Section: Finite Element Modelling Of Thick Shells Under Global Bendingmentioning

confidence: 99%

“…The cylinder was assumed to be of medium length with L/R = 7, of sufficient length for the local shell bending effects near the end boundaries to have little influence on the result [22,32,46,47].…”

Section: Finite Element Modelling Of Thick Shells Under Global Bendingmentioning

confidence: 99%

Solid or shell finite elements to model thick cylindrical tubes and shells under global bending

Sadowski¹,

Rotter²

2013

International Journal of Mechanical Sciences

View full text Add to dashboard Cite

show abstract

“…The fracture toughness can be experimentally determined by ASTM standard testing method [8] or some numerical approaches, e.g., [9]. For plastic pipes, most research employed elastic-plastic finite element analysis to investigate the fracture response (Crack Tip Opening Displacement) of the cracked pipes [10][11][12]. The elastic-plastic fracture analysis is necessary in modelling crack propagation but can demand more effort on simulation than elastic fracture analysis, including computational time.…”

Section: Introductionmentioning

confidence: 99%

Analytical model of elastic fracture toughness for steel pipes with internal cracks

Yang

2016

Engineering Fracture Mechanics

View full text Add to dashboard Cite

This version is available at https://strathprints.strath.ac.uk/54853/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output. ANALYTICAL MODEL OF ELASTIC FRACTURE TOUGHNESS FOR STEEL PIPES WITH INTERNAL CRACKS ABSTRACTCorrosion or manufacture defects can cause internal cracks in steel pipes. For ductile materials, the crack front can yield before the stress intensity reaches its fracture toughness. The yielding of the crack front could ease the stress concentration at the crack front. Therefore, to predict the failure of cracked steel pipes using linear elastic fracture mechanics it is necessary to quantify the part of fracture toughness that withstands the elastic stress field, namely, elastic fracture toughness. This paper intends to propose an analytical model of the elastic fracture toughness for steel pipes with internal surface cracks.

show abstract

“…Most (metallic) industrial structures on the other hand can be subject to extreme or accidental loading conditions during their life time, inducing plastic deformation. Long-distance (off-shore) pipelines for example are exposed to high internal pressure in combination with bending and tension, resulting in large plastic strains [1,2]. Apart from operationally induced plastic strains, offshore pipelines are already plastically deformed during their installation with a layship, because of reeling strains (before the pipe is released), strains during the release (overbend in S-lay) and strains at the area of laying (sagbend in S-lay) [3].…”

Section: Introductionmentioning

confidence: 99%

A novel ultrasonic strain gauge for single-sided measurement of a local 3D strain field

et al. 2014

View full text Add to dashboard Cite

A novel method is introduced for the measurement of a 3D strain field by exploiting the interaction between ultrasound waves and geometrical characteristics of the insonified specimen. First, the response of obliquely incident harmonic waves to a deterministic surface roughness is utilized. Analysis of backscattered amplitudes in Bragg diffraction geometry then yields a measure for the in-plane strain field by mapping any shift in angular dependency. Secondly, the analysis of the reflection characteristics of normal incident pulsed waves in frequency domain provides a measure of the out-of-plane normal strain field component, simply by tracking any change in the stimulation condition for a thickness resonance. As such, the developed ultrasonic strain gauge yields an absolute, contactless and single-sided mapping of a local 3D strain field, in which both sample preparation and alignment procedure are needless. Results are presented for cold-rolled DC06 steel samples onto which skin passing of the work rolls is applied. The samples have been mechanically loaded, introducing plastic strain levels ranging from 2 % up to 35 %. The ultrasonically measured strains have been validated with various other strain measurement techniques, including manual micrometer, longitudinal and transverse mechanical extensometer and optical mono-and stereovision digital image correlation. Good agreement has been obtained between the ultrasonically determined strain values and the results of the conventional methods. As the ultrasonic strain gauge provides all three normal strain field components, it has been employed for the extraction of Lankford ratios at different applied longitudinal plastic strain levels, revealing a strain dependent plastic anisotropy of the investigated DC06 steel sheet.

show abstract

Fracture response of pipelines subjected to large plastic deformation under tension

Cited by 101 publications

References 14 publications

Solid or shell finite elements to model thick cylindrical tubes and shells under global bending

Solid or shell finite elements to model thick cylindrical tubes and shells under global bending

Analytical model of elastic fracture toughness for steel pipes with internal cracks

A novel ultrasonic strain gauge for single-sided measurement of a local 3D strain field

Contact Info

Product

Resources

About