Equibiaxial Low-Cycle Fatigue Properties of Typical Pressure-Vessel Steels

Ives, K. D.; Kooistra, L. F.; Tucker, J. T.

doi:10.1115/1.3645956

Cited by 18 publications

(5 citation statements)

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“…The results of Ives et al [18], Zamrik [19], Sachs [20] and Weiss [21] showed for a range of steels and aluminium alloys that octahedral shear strain provided good correlation forv d 4 d + 1. It has already been shown that y* = ymax for this regime and that with suitable factoring yoc, never differs from ymax by more than 57.5%.…”

Section: Other Supporting Evidence-low Cycle Rkgimementioning

confidence: 99%

A Simple Theory for Low Cycle Multiaxial Fatigue

Lohr

Ellison

1980

Fat Frac Eng Mat Struct

123

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A theoretical development based on a simple physical model is proposed to help the designer predict high strain multi-axial fatigue behaviour. This approach hypothesises that the maximum shear strain y*, on planes driving the crack through the thickness, controls the fatigue crack propagation rate and hence the life. The direct strain E.* acting normal to the plane of y* can exert a secondary modifying influence. Experimental results from several research laboratories have been analysed in this manner with some success. NomenclatureSurface principal strain ratio ; smallerflarger Principal direct strains Principal direct stresses Poisson's ratio Equivalent Poisson's ratios Shear strain Octahedral shear strain Maximum shear strain Direct strain normal to plane of ymax Max. shear strain on plane 45" to surface; larger of y,, and yo, Direct strain normal to plane of y* Ratio applied shear strain/applied tensile strain

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Section: Other Supporting Evidence-low Cycle Rkgimementioning

confidence: 99%

A Simple Theory for Low Cycle Multiaxial Fatigue

Lohr

Ellison

1980

Fat Frac Eng Mat Struct

123

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“…Unfortunately, testing on structures representative of real plant components is expensive but should be increased to help contribute to the general understanding of the various aggravating effects [7][8][9][10][11][12][13][14]. In order to obtain fatigue strength data under structural loading, biaxial test devices with and without a PWR environment were developed at LISN [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…The basic idea of the disc bending fatigue test was presented by Ives et al [11] and Shewchuk et al [12] about 50 years ago. In this test technique, a disc specimen is subjected to bending load by applying air pressure on the specimen surface.…”

Section: Introductionmentioning

confidence: 99%

Environmental Effect on Fatigue Crack Initiation under Equi-Biaxial Loading of an Austenitic Stainless Steel

Gourdin

Dhahri

Baglion

et al. 2021

Metals

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The lifetime extension of nuclear power stations is considered an energy challenge worldwide. That is why the risk analysis and the study of various effects of different factors that could potentially prevent safe long-term operation are necessary. These structures, often of great dimensions, are subjected during their life to complex loading combining varying multiaxial mechanical loads with non-zero mean values associated with temperature fluctuations under a PWR (pressure water reactor) environment. Based on more recent fatigue data (including tests at 300 °C in air and a PWR environment, etc.), some international codes (RCC-M, ASME, and others) have proposed and suggested a modification of the austenitic stainless steels fatigue curve combined with a calculation of an environmental penalty factor, namely Fen, which has to be multiplied by the usual fatigue usage factor. The determination of the field of validation of the application of this penalty factor requires obtaining experimental data. The aim of this paper is to present a new device, “FABIME2e” developed in the LISN (Laboratory of Integrity of Structures and Normalization) in collaboration with EDF (Electricity of France) and Framatome. These new tests allow the effect of a PWR environment on a disk specimen to be quantified. This new device combines structural effects such as equibiaxiality and mean strain and the environmental penalty effect with the use of a PWR environment during fatigue tests.

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“…2 The first experimental device [14] To obtain an equi-biaxial strain state, we have chosen to apply different oil pressure values on each side of a spherical diaphragm. The basic idea of the disc bending fatigue test was presented by Ives et al [15] and Shewchuk et al [16] about 50 yr ago. In this test technique, a disc specimen is subjected to bending load by applying air pressure on the specimen surface.…”

Section: Introduction and Aimmentioning

confidence: 99%

“…To ensure well-defined experimental conditions, various measuring means are located symmetrically at the two half-shells: -Pressure sensor with a measuring range between 0 and 100 bars. 3 The experimental results [15] Biaxial fatigue tests were carried out on two austenitic stainless steels: "316L THY", and "304L CLI". The first material has been provided by Thyssen Krupp Materials France as a 15 mm thickness rolled sheet.…”

Section: Introduction and Aimmentioning

confidence: 99%

PWR effect on crack initiation under equi-biaxial loading development of the experiment

Gourdin

Dhahri

Courtin³

et al. 2019

Mechanics & Industry

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The lifetime extension of the nuclear power stations is considered as an energy challenge worldwide. That is why, the risk analysis and the study of various effects of different factors that could potentially represent a hazard to a safe long term operation are necessary. The methodology for fatigue dimensions of the Pressurized Water Reactor components (PWR) is based on the use of design curves established from test carried out in air at 20°C on smooth specimens by integrating safety coefficient that covers the dispersion of tests associated with the effects of structures. To formally integrate these effects, some international codes have already proposed and suggested a modification of the austenitic stainless steels fatigue curve combined with a calculation of an environmental penalty factor, namely Fen, which has to be multiplied by the usual fatigue usage factor. The aim of this paper is to present a new device "FABIME2E" developed in the CEA-LISN in collaboration with EDF and AREVA. These new tests allow quantifying accurately the effect of PWR environment on semi-structure specimen. This new device combines the structural effect like equi-biaxiality and mean strain and the environmental penalty effect with the use of PWR environment during the fatigue tests.

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Equibiaxial Low-Cycle Fatigue Properties of Typical Pressure-Vessel Steels

Cited by 18 publications

References 0 publications

A Simple Theory for Low Cycle Multiaxial Fatigue

A Simple Theory for Low Cycle Multiaxial Fatigue

Environmental Effect on Fatigue Crack Initiation under Equi-Biaxial Loading of an Austenitic Stainless Steel

PWR effect on crack initiation under equi-biaxial loading development of the experiment

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