Correlation of load drop and crack initiation criteria in fatigue life experiments of metallic materials

Heckmann, Klaus; Sievers, J.; Schopf, Tim; Lücker, Lukas; Schmiedt-Kalenborn, Anke; Walther, Frank; Starke, Peter; Acosta, Ruth; Boller, Christian

doi:10.1016/j.engfracmech.2021.107785

Cited by 6 publications

(4 citation statements)

References 9 publications

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“…For total strain amplitudes larger than 1 × 10 −2 , it should be noted tha of the present calculations is limited since the Chaboche parameters we For total strain amplitudes larger than 1 × 10 −2 , it should be noted that the reliability of the present calculations is limited since the Chaboche parameters were adjusted for relatively small total strain amplitudes. Further investigations and results of this work are described in more detail in [31].…”

Section: Uncertainties Of Crack Position and Progression On Total Strain Controlled Fatigue Resultsmentioning

confidence: 98%

“…For the description and evaluation of the incident of crack initiation, the transition between a fatigue analysis from the uncracked to the cracked structure where fracture mechanics-based evaluations in the LCF regime of the components considered are essential. Based on the results of the fatigue tests presented here, the specimens were analyzed with respect to the location of crack initiation and the assumption to be made [31]. The changes in the stress amplitudes of the total strain-controlled fatigue tests (e.g., Figure 4a) are related to crack geometries and crack sizes in order to develop an appropriate correlation.…”

Section: Uncertainties Of Crack Position and Progression On Total Strain Controlled Fatigue Resultsmentioning

confidence: 99%

“…For total strain amplitudes larger than 1 × 10 , it should be noted tha of the present calculations is limited since the Chaboche parameters we relatively small total strain amplitudes. Further investigations and results o described in more detail in [31].…”

Section: Uncertainties Of Crack Position and Progression On Total Strain Controlled Fatigue Resultsmentioning

confidence: 99%

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A Short-Time Approach for Fatigue Life Evaluation of AISI 347 Steel for Nuclear Power Energy Applications

et al. 2021

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AISI 347 austenitic steel is, as an example, used in nuclear energy piping systems. Piping filled with superheated steam or cooled water is particularly exposed to high stresses, whereupon local material properties in the pipes can change significantly, especially in the case of additional corrosive influences, leading to aging of the material. In the absence of appropriate information, such local material property variations are currently covered rather blanketly by safety factors set during the design of those components. An increase in qualified information could improve the assessment of the condition of such aged components. As part of the collaborative project “Microstructure-based assessment of the maximum service life of core materials and components subjected to corrosion and fatigue (MiBaLeB)”, the short-time procedure, StrainLife, was developed and validated by several fatigue tests. With this procedure, a complete S–N curve of a material can be determined on the basis of three fatigue tests only, which reduces the effort compared to a conventional approach significantly and is thus ideal for assessing the condition of aged material, where the material is often rare, and a cost-effective answer is often very needed. The procedure described is not just limited to traditional parameters, such as stress and strain, considered in destructive testing but rather extends into parameters derived from non-destructive testing, which may allow further insight into what may be happening within a material’s microstructure. To evaluate the non-destructive quantities measured within the StrainLife procedure and to correlate them with the aging process in a material, several fatigue tests were performed on unnotched and notched specimens under cyclic loading at room and elevated temperatures, as well as under various media conditions, such as distilled water and reactor pressure vessel boiling water (BWR) conditions.

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Section: Uncertainties Of Crack Position and Progression On Total Strain Controlled Fatigue Resultsmentioning

confidence: 98%

Section: Uncertainties Of Crack Position and Progression On Total Strain Controlled Fatigue Resultsmentioning

confidence: 99%

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A Short-Time Approach for Fatigue Life Evaluation of AISI 347 Steel for Nuclear Power Energy Applications

et al. 2021

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“…For example, information regarding the defect density in bulk materials can be obtained via electrical resistance measurement [4,5] and subsurface changes can be sensed via magnetic field sensors [6,7], resulting in a gain in information. It should be noted that numerous developments have been made in sensor technology, whereby physical parameters associated with very localised fatigue damage can also be recorded with high resolution.…”

Section: Introductionmentioning

confidence: 99%

Characterization of the Fatigue Behaviour of Low Carbon Steels by Means of Temperature and Micromagnetic Measurements

Raghuraman

Ziman

et al. 2022

Metals

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Investigations on low carbon (non- and low-alloy) steels were conducted in form of load increase tests (LIT) and constant amplitude tests (CAT) to find the correlation among material behaviour, mechanical load, and the type of NDT method. With the help of preprogrammed load-free sequences, the thermal impact on magnetic Barkhausen noise (MBN) measurement can be avoided, so that the cyclic deformation properties of material responses can be interpreted more precisely. The results indicate differences between the change in temperature and the MBN-derived variable during LITs and CATs regarding the demonstration of the incubation stage and the cyclic hardening behaviour.

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Crack Initiation and Propagation Mechanism of Flawed Rock Mass Based on Improved Maximum Distortion Energy Theory and PFC Numerical Simulation

Jing,

Cao,

Jing

et al. 2024

J Fail. Anal. and Preven.

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Correlation of load drop and crack initiation criteria in fatigue life experiments of metallic materials

Cited by 6 publications

References 9 publications

A Short-Time Approach for Fatigue Life Evaluation of AISI 347 Steel for Nuclear Power Energy Applications

A Short-Time Approach for Fatigue Life Evaluation of AISI 347 Steel for Nuclear Power Energy Applications

Characterization of the Fatigue Behaviour of Low Carbon Steels by Means of Temperature and Micromagnetic Measurements

Crack Initiation and Propagation Mechanism of Flawed Rock Mass Based on Improved Maximum Distortion Energy Theory and PFC Numerical Simulation

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