The effect of strain biaxiality on the fracture of zirconium alloy fuel cladding

Zouari, Ahmed; Bono, M.; Boulch, D. Le; Jolu, Thomas Le; Crépin, Jérôme; Besson, Jacques

doi:10.1016/j.jnucmat.2021.153070

Cited by 7 publications

(9 citation statements)

References 42 publications

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“…The data for CWSR Zircaloy-4 shown in Figure 11 indicate that the rupture strain decreases as the strain ratio increases up to 0, and it is relatively constant for strain ratios between 0 and 0.44. This same trend was observed in a previous study, [8] in which EDCT tests with tensile rods were performed on the same sample material. However, in the previous study, the wall thickness of each tubular sample had been reduced by 9% over the central portion of its length in order to force rupture to occur in the centre, and the objective of that study was to investigate the failure of the tubes via the accumulation of ductile damage.…”

Section: Edct Tests On Cwsr Zircaloy-4supporting

confidence: 86%

“…the tubular sample using a standard tensile testing machine with a single actuator. [7][8][9] Therefore, a special machine is not required, and EDCT tests can be performed in any laboratory equipped with a tensile testing machine.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…The guide is manipulated by tensile rods and assures that the force exerted on the sample is purely axial. [8] In this study, there are four tensile rods, two of which are attached to each half of the guide. The opposite end of each rod is attached to one of the outer plates of the compression cage.…”

Section: Edct Device With Tensile Rodsmentioning

confidence: 99%

“…Complete details of the model are given in Le Saux et al [30] The tensile rods used in this study were composed of 304L austenitic stainless steel, which was selected because it has the necessary work hardening rate to increase the axial force on the sample throughout the test to achieve the desired strain ratio. The measured true stress-strain curve from a tensile test [8] is shown in Figure 6 and was used directly in CAST3M, assuming von Mises plasticity. The piston was modelled as a rigid solid.…”

Section: Materials Modelsmentioning

confidence: 99%

“…It is also possible for failure to occur in this zone after a significant amount of plastic deformation has occurred, as shown in the figure . It is possible to increase the attainable strain biaxiality by reinforcing the sample in the zone of strain localization. Alternatively, the sample could be reduced in thickness in the area of interest near the centre, as was done in a previous study, [8] in which the wall thickness was reduced by 9% over the central portion of its length. The tests on modified samples were able to reach greater strain biaxialities and were used to create a model for the ductile failure of Zircaloy-4 as a function of the biaxiality.…”

Section: Simulations Of the Limiting Strain Ratiomentioning

confidence: 99%

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Biaxial expansion due to compression experiments for measuring the failure strain of tubular samples

Bono,

Zouari,

Le Jolu

et al. 2023

Strain

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The failure strain of a tube is a function of the biaxial strain ratio (axial strain/hoop strain) to which it is subjected. The relationship between failure strain and the strain ratio can be determined experimentally using expansion due to compression tests with a tensile load (EDCT), in which a ductile pellet placed inside the tube is compressed axially so it expands in diameter and imposes a hoop strain on the tube. At the same time, a tensile load on the ends of the tube creates an axial strain. This study investigates the capabilities and limitations of EDCT tests using two devices that allow experiments to be performed on a standard tensile testing machine. The first device applies an axial force on the ends of the sample, and the second device applies an axial displacement. Tests on zirconium alloy tubes confirmed that the failure strain is dependent on the strain ratio and the metallurgical state of the material. EDCT tests can produce a range of strain ratios, but there is an upper limit on the strain ratio that can be obtained, and it is dependent on the plastic behaviour of the sample and the friction conditions between the components.

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Section: Edct Tests On Cwsr Zircaloy-4supporting

confidence: 86%

Section: Experimental Methodsmentioning

confidence: 99%

Section: Edct Device With Tensile Rodsmentioning

confidence: 99%

Section: Materials Modelsmentioning

confidence: 99%

Section: Simulations Of the Limiting Strain Ratiomentioning

confidence: 99%

See 3 more Smart Citations