A pin-loading tension test for evaluation of thin-walled tubular materials

Grigoriev, V.; Josefsson, B.; Lind, A.; Rosborg, Bo

doi:10.1016/0956-716x(95)00110-h

Cited by 43 publications

(16 citation statements)

References 4 publications

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“…This is because of the stringent requirements of the ASTM test methods for satisfaction of plane strain condition at the crack tip. A number of test techniques have been proposed in research literature (Grigoriev et al 1995(Grigoriev et al , 1996Grigoriev and Jakobsson 2005;Bertsch and Hoffelner 2006;Samal et al 2010;Yagnik et al 2008) that can approximate the state of stress experienced by the cladding for crack initiation and propagation in the axial direction.…”

Section: Introductionmentioning

confidence: 99%

Fracture behavior of thin-walled Zircaloy fuel clad tubes of Indian pressurized heavy water reactor

Sanyal

Samal

2012

Int J Fract

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For structural integrity analysis of thin walled tubular components such as fuel claddings used in nuclear reactors, knowledge of valid fracture mechanics parameters are required. As axiallycracked thin tubes possess a non-standard geometry from the point of view of specimen fabrication, there is no direct straight forward way to derive their fracture mechanics parameters with known functions as can be done for standard test methods. In the present work, the J-R curve for an axially cracked fuel pin from Indian 220 MWe pressurized heavy water reactor is derived after experimental and analytical derivation of the required parameters and the results are compared with earlier published data for similar material. List of symbolsa Crack length a 0 Crack length at the start of the test a bi Blunting corrected crack size at the ith data point of the load-normalization method b 0 Initial unbroken ligament length of the PLT specimen A Cracked area of the PLT specimen fracture surface A uc Area of the remaining ligament or un-cracked area A el Elastic part of area under the load-displacement curve A pl Plastic part of area under the load-displacement curve C Compliance of the PLT specimens E Young's modulus f (a/W ) Geometric shape function for evaluation of stress intensity factor as a function of a/W for a finite PLT specimen F L Limit load of the PLT specimens J J -integral J 0.2 J-integral corresponding to 0.2 mm crack growth J el Elastic part of J-integral J pl

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Section: Introductionmentioning

confidence: 99%

Fracture behavior of thin-walled Zircaloy fuel clad tubes of Indian pressurized heavy water reactor

Sanyal

Samal

2012

Int J Fract

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“…1. The details of the specimen (Grigoriev et al 1995;Samal et al 2010a, b;Sanyal et al 2011a, b;Samal and Sanyal 2012;Sanyal and Samal 2012a, b). As shown in Fig.…”

Section: Analytical Frameworkmentioning

confidence: 99%

“…Here, it is to be noted that for PLT specimens, a/W is essentially the ratio of sum of specimen crack length (a) and virtual crack length of the fixture (b = 8 mm for all current cases as W = 19 mm) to W (Grigoriev et al 1995;Samal et al 2010aSamal et al , b, 2011Sanyal et al 2011a, b;Samal and Sanyal 2012;Sanyal and Samal 2012a, b). In other words, for calculation of a/W, the crack length due to specimen-fixture assembly has to be considered rather than considering crack length of the specimen alone.…”

Section: Introductionmentioning

confidence: 99%

“…The geometry of the tubes does not allow one to resort to any direct and straightforward standard procedure by which a valid fracture property can easily be evaluated. Out of the various non-standard test procedures, Grigoriev et al (1995) reported a novel test method called Pin-loading tension test (PLT) in which a section of the thin-walled tube itself can be loaded in combination with suitable jig and fixture assembly ( Fig. 1) to generate meaningful fracture data.…”

Section: Introductionmentioning

confidence: 99%

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A geometry-dependent generalized shape function for calculation of stress intensity factor for axially cracked thin-walled tubes

Sanyal

Samal

2014

Int J Adv Struct Eng

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Geometric shape function, f(a/W), is a correction factor that accounts for finite specimen size in calculation of stress intensity factor (SIF). Pin-loading tension method is suitable for fracture toughness testing of axially cracked thin-walled tubular specimens. But unique expression for f(a/W) of such specimens does not exist as it is sensitive to tube geometry. In this work, a generalized form of geometric shape function has been derived through a detailed finite element analysis and the outcome is validated with actual experimental results. Using the general shape function, SIF for any axially cracked thin-walled tube having dimensions within the range can be predicted.

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“…Consequently, loading must be applied along the hoop direction of cladding, where the highest stresses occur during the fuel cycle. As it is very difficult to perform fracture tests along the hoop direction, some authors have used the Pin-Load Tension test (PLT) to study the fracture toughness of cladding in the axial direction [6], Others have used zirconium alloy plates to investigate the fracture properties as a function of hydrogen content [3], In this paper, for the first time, the ring compression test is used to study the fracture properties of nuclear fuel cladding in the hoop direction. From the available tests, this particular one was selected because stable crack propagation is observed after the maximum load, and this allows the calculation of the fracture energy by using the cohesive crack theory [7].…”

Section: Introductionmentioning

confidence: 99%

Determination of the hoop fracture properties of unirradiated hydrogen-charged nuclear fuel cladding from ring compression tests

Martín-Rengel¹,

Sánchez²,

Ruiz-Hervías³

et al. 2013

Journal of Nuclear Materials

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A pin-loading tension test for evaluation of thin-walled tubular materials

Cited by 43 publications

References 4 publications

Fracture behavior of thin-walled Zircaloy fuel clad tubes of Indian pressurized heavy water reactor

Fracture behavior of thin-walled Zircaloy fuel clad tubes of Indian pressurized heavy water reactor

A geometry-dependent generalized shape function for calculation of stress intensity factor for axially cracked thin-walled tubes

Determination of the hoop fracture properties of unirradiated hydrogen-charged nuclear fuel cladding from ring compression tests

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