Effect of mean stress and ratcheting strain on fatigue life of steel

Xia, Zihui

doi:10.1016/0142-1123(96)00088-6

Cited by 190 publications

(106 citation statements)

References 6 publications

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“…The experimental results conducted by Rider et al (1995) showed that cyclic plastic strain vs. fatigue life curves did not fit Manson-Coffin relationship (Manson, 1954;Coffin, 1970) for En3 steel in the stress cycling with axial mean stress. Xia et al (1996) separated the effects of mean stress and ratcheting strain on the fatigue life of ASTM A-516 Gr.70 steel by two different preloading procedures, and found that both the ratcheting strain and mean stress can cause additional damage and then result in a monotonically decreasing of fatigue life when the applied mean stress increases, similar to the recent works by Kwofie and Chandler (2001), Yang (2005) and Kang and Liu (2008) for the polycrystalline copper, 45 carbon steel and annealed and tempered 42CrMo steels, respectively. However, the observation done by Kang et al (2006) showed that for 304 stainless steel, the fatigue life did not decrease monotonically with the increase of tensile mean stress, and the variation of mean stress slightly influenced the fatigue life, even the shortest fatigue life occurred in the stress cycling with small mean stress (such as 5 and 10 MPa).…”

Section: Introductionsupporting

confidence: 70%

Uniaxial ratcheting and fatigue failure of tempered 42CrMo steel: Damage evolution and damage-coupled visco-plastic constitutive model

Kang

Liu

Ding

et al. 2009

International Journal of Plasticity

187

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Section: Introductionsupporting

confidence: 70%

Uniaxial ratcheting and fatigue failure of tempered 42CrMo steel: Damage evolution and damage-coupled visco-plastic constitutive model

Kang

Liu

Ding

et al. 2009

International Journal of Plasticity

187

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“…The primary driving force to achieve this understanding is: imposition of asymmetric stress cycle leads to enhanced strain accumulation in an engineering component [1][2][3]. Accumulation of this type of additional plastic strain decreases fatigue life [4,5] and limits the predictive capability of the Coffin-Manson relation [6]. This is one of the serious issues in critical engineering structures such as in nuclear power plants, since the accumulated plastic strain governs the life of engineering components subjected to LCF.…”

Section: Introductionmentioning

confidence: 98%

Fatigue damage of AISI 304 LN stainless steel: Role of mean stress

Ray

Dutta

Sivaprasad

et al. 2010

Procedia Engineering

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This investigation examines the influence of varied combinations of mean stress ( m ) and alternating stress ( a ) on strain accumulation during fatigue tests and the resultant in-situ microstructural and substructural variations of AISI 304 LN stainless steel. Stress-controlled fatigue tests have been carried out at 300 K using positive, zero, and negative mean stress conditions, supplemented by microstructural and substructural analyses using TEM and XRD. The results highlight that the characteristics of strain accumulation in the selected steel is governed by the magnitude of m and a , apart from considerable dependence on insitu formation of deformation induced martensite and substructural changes.

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“…Different ratcheting phenomena have been summarized by Hubel [1]. Xia et al [2] studied the effect of tensile mean stress with or without ratcheting strain on fatigue life of SA 516 Gr. 70 steel.…”

Section: Introductionmentioning

confidence: 99%

Fatigue ratcheting studies on TP304 LN stainless steel straight pipes

Vishnuvardhan

Raghava

Gandhi

et al. 2010

Procedia Engineering

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Fatigue Ratcheting' is a phenomenon which leads to reduction in fatigue life of a structural component by loss of ductility due to cycle-by-cycle accumulation of plastic strain. One real-life example of a situation with fatigue ratcheting possibility is piping of power plants subjected to internal pressure (primary load) and cyclic bending (secondary load). Fatigue ratcheting studies were carried out on TP304 LN stainless steel straight pipes of 168 mm outer diameter subjected to steady internal pressure and four point cyclic bending. The length and average thickness of the pipes were 2800 mm and 15 mm respectively. The thickness was reduced to 12 mm in the gauge length portion of 200 mm at the centre of the pipe. Post-yield two element rosette strain gauges were mounted at various locations within the gauge length to measure the longitudinal and circumferential strains. The pipes were filled with water and pressurized; the pressure was maintained at 35 MPa till the first through-thickness crack was observed. Cyclic bending load was applied on the pipes by subjecting them to different levels of load-line displacements. Number of cycles corresponding to through-thickness crack/s and final failure of the component were recorded. During the tests, load, load-line displacement and deflections at three locations were continuously monitored. Local bulging, ovalization and consequent thinning of the pipe cross-section were observed due to fatigue ratcheting. These ratcheting studies on pressurized piping components of power plants give valuable inputs necessary for designing the components and assuring the integrity of pressure boundary under design basis loads such as loads arising during an earthquake event.

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Effect of mean stress and ratcheting strain on fatigue life of steel

Cited by 190 publications

References 6 publications

Uniaxial ratcheting and fatigue failure of tempered 42CrMo steel: Damage evolution and damage-coupled visco-plastic constitutive model

Uniaxial ratcheting and fatigue failure of tempered 42CrMo steel: Damage evolution and damage-coupled visco-plastic constitutive model

Fatigue damage of AISI 304 LN stainless steel: Role of mean stress

Fatigue ratcheting studies on TP304 LN stainless steel straight pipes

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