Determination of CTOD resistance curves in side-grooved Single-Edge Notched Tensile specimens using full field deformation measurements

Verstraete, Matthias; Denys, Rudi; Minnebruggen, Koen Van; Hertelé, Stijn; Waele, Wim De

doi:10.1016/j.engfracmech.2013.07.015

Cited by 34 publications

(19 citation statements)

References 25 publications

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“…The method considered in this publication essentially relies on Rice's 90° degrees intercept method [28], starting from the original crack tip. In previous work, the authors have demonstrated the validity and equivalence of this method by comparison with the δ 5 method developed by the Helmholtz-Zentrum Geesthacht (formerly GKSS) [29]. In practice, two small mounting pieces are bolted onto the specimen's top surface, facilitating the attachment of two clip gauges on the knife-like ends ( Figure 2).…”

Section: Ctod Measurementmentioning

confidence: 99%

“…This is sufficiently far away from the cracked ligament (four times the thickness of the specimen) to obtain a uniform current distribution [31]. To eliminate possible detrimental effects of current leakage, temperature changes and current changes on the measured potential drop across the crack, the two probe technique is adopted [16]. A first reference probe measurement (V ref ) is performed at a distance 2W from the cracked ligament.…”

Section: Direct Current Potential Dropmentioning

confidence: 99%

“…This CTOD parameter is measured using the double clip gauge method, which is well described and validated in literature for SENT testing [11,12]. For the evaluation of the crack extension, both the unloading compliance (UC) and direct current potential drop method (DCPD) are described in literature [12][13][14][15][16]. It is however not clear which method yields the most accurate estimate.…”

Section: Introductionmentioning

confidence: 99%

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Single-specimen evaluation of tearing resistance in SENT testing

Verstraete

Waele

Minnebruggen

et al. 2015

Engineering Fracture Mechanics

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Please cite this article as: Verstraete, M.A., De Waele, W., Van Minnebruggen, K., Hertelé, S., Single-specimen evaluation of tearing resistance in SENT testing, Engineering Fracture Mechanics (2015), doi: http://dx.doi.org/ 10. 1016/j.engfracmech.2015.07.067 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Abstract The evaluation of CTOD tearing resistance is required by several strain based defect assessment procedures. To that extent, the use of SENT testing is widely advised as the constraint matches that of pressurized pipes. This indicates the need for well validated testing methods. This paper discusses two single specimen techniques for the evaluation of tearing resistance using clamped SENT specimens: the unloading compliance (UC) and the direct current potential drop (DCPD) technique. From the results of tests carried out on a variety of both base metal and welded specimens, both methods show a comparable accuracy and scatter. Single-specimen evaluation of tearing resistance in SENT testing

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Section: Ctod Measurementmentioning

confidence: 99%

Section: Direct Current Potential Dropmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Single-specimen evaluation of tearing resistance in SENT testing

Verstraete

Waele

Minnebruggen

et al. 2015

Engineering Fracture Mechanics

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“…SENB and CT specimens are too conservative for this application due to the imposed bending moment herein. Low-constraint fracture toughness tests such as the Single Edge Notched Tension (SENT) test serve as an alternative with reduced conservatism [5,6,7]. The experiments performed in this research are SENT tests on welded connections in which a defect is represented as a notch in the weld material centre.…”

Section: Sent Testingmentioning

confidence: 99%

“…Crack driving force is represented by means of crack tip opening displacement (CTOD) [8,9,6]. Quantification of CTOD is performed by the usage of two clip gauges, mounted over the notch at different heights using the procedure described by BS8571:214 [10].…”

Section: Sent Testingmentioning

confidence: 99%

Experimental and numerical analysis of deformation patterns in notched heterogeneous welds

Avalos¹,

Keppens²,

Naib³

et al. 2017

SCAD

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Standardized weld flaw assessment techniques assume the weld region to be homogeneous which is a strong idealisation of reality. Characterising the effects of heterogeneous properties of welds through the analysis of deformation patterns and slip lines is the major concern of this research. It is the goal to investigate which effects these variations in properties within the weld material have on the propagation of cracks within the weld material. Performed experiments are SENT tests on strongly heterogeneous welded connections. The same material is also simulated with a weld heterogenisation model in ABAQUS®. Results from both experiments and simulations are discussed and compared. It is shown that slip lines tend to avoid zones of high hardness in a way that a path of least resistance is found. Related to this, it is seen that the slip line angles deviate from the theoretical 45° for homogeneous material. Obtained results validate the numerical model used.

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