Models of bending strength for Gilsocarbon graphites irradiated in inert and oxidising environments

Eason, E.D.; Hall, Graham; Marsden, Barry; Heys, Graham B.

doi:10.1016/j.jnucmat.2012.06.034

Cited by 16 publications

(10 citation statements)

References 7 publications

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“…Moreover, resultant changes in flexural strength due to porosity level from the four point bending test simulation are found to be within ± 7% of the experimental results of graphite from G3HNB plant while the trend in degradation of flexural strength is similar to the one by G2HPB graphite [16]. Resultant formulations of elastic modulus and fracture properties of graphite based on porosity level from the current analysis can be implemented within the failure analysis of the nuclear graphite structures, which makes use of CDM [21,27,28].…”

Section: Resultssupporting

confidence: 59%

“…The flexural strengths from four point bending simulation are also compared against available graphite strength data from different UK nuclear stations [16]. A regression line of the experimental data is used for the purpose of comparison while the variability of 10MPa is expected for experimental strength data.…”

Section: Resultsmentioning

confidence: 99%

“…They are a compact tension (CT) specimen and a four-point bending specimen. These types of specimen are chosen due to wide availability of experimental data for both virgin and irradiated graphite in the literature [16][17][18][19]. The geometry and boundary conditions for both specimens are shown in Fig.…”

Section: Geometry and Boundary Conditions Of Finite Element Models Fomentioning

confidence: 99%

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Effect of large deformation on creep property evaluation by small-specimen bending tests

Zhuang

Zhou

et al. 2016

International Journal of Pressure Vessels and Piping

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A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. AbstractPhysical mechanisms at different length scales have to be taken into account while predicting the overall failure of nuclear graphite structures of advanced gas cooled graphite reactors. In this paper, the effect of composition of meso graphite phases and porosity on the aggregate elastic properties is predicted using the Eshelby homogenisation method. Results indicate an overall decrease in elastic modulus with an increase in porosity. Subsequently, the moduli at different porosity levels are used to predict the critical strain energy release rates for crack propagation of graphite, and fracture behaviour is studied using compact tension and four point bending tests. Compared to flexural strength at zero porosity level, significant reduction in strength of up to 80% at 30% porosity level is observed. Evolution of flexural strength due to porosity is also compared against available experimental values of graphite from UK nuclear plants.

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Section: Resultssupporting

confidence: 59%

Section: Resultsmentioning

confidence: 99%

Section: Geometry and Boundary Conditions Of Finite Element Models Fomentioning

confidence: 99%

See 1 more Smart Citation

Effect of large deformation on creep property evaluation by small-specimen bending tests

Zhuang

Zhou

et al. 2016

International Journal of Pressure Vessels and Piping

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“…As a result, initiation of new cracks during cooling down stage is expected at the outermost region of the aging bricks with high weight loss level. This is because the graphite strength, as demonstrated in [11], is reduced significantly as the weight loss increases. …”

Section: Effects Of Temperature On Fracture Characteristics Of Graphimentioning

confidence: 97%

“…For virgin graphite, tensile strength of 22.3 MPa is taken from [10]. It is assumed that the evolution of tensile strength due to weight loss from radiolytic oxidation is similar to the trend of flexural strength given in [11]. The values of tensile strength at different doses are tabulated in Table 2.…”

Section: Graphite Propertiesmentioning

confidence: 99%