Analysis of different fatigue damage accumulation theories and damage parameters based on experiments with the steel HC340LA

Palma, V. De; Tomasella, Alessio; Frendo, Francesco; Melz, Tobias; Sonsino, Cetin Morris

doi:10.1002/mawe.201600589

Cited by 3 publications

(3 citation statements)

References 27 publications

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“…Furthermore, an efficient life prediction approach relies on a comprehensive understanding of the damage accumulation process in the creep or creep and fatigue interaction regimes. Recently, some researchers have investigated damage accumulation process under creep-fatigue interaction by continuum damage mechanics (CDM) models [11][12][13][14][15]. However, pure fatigue damage and pure creep damage were added linearly in these CDM models, where the effect of the interaction of fatigue and creep was ignored and the damage accumulation calculation was rather crude [11,12].…”

Section: Introductionmentioning

confidence: 99%

Predicting failure modes in creep and creep-fatigue crack growth using a random grain/grain boundary idealised microstructure meshing system

Zhao

Nikbin

2017

Materials Science and Engineering: A

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An idealised microstructure mesh model combined with a novel creep and creepfatigue damage accumulation model was employed to simulate crack growth behaviour under creep/fatigue conditions for a modified 9Cr-1Mo steel. The influence of microstructures on the crack growth behaviour was studied using a random grains separated by idealised grain boundaries. For accurately representing the damage accumulation in creep-fatigue regime, a non-linear damage model was employed. In this case, creep damage was determined by multiaxial ductility exhaustion approach and fatigue damage was reliant on maximum stress and plastic range ahead of crack tip per loading cycle. When creep dominated, cracks mainly propagated along grain boundaries in steady crack growth stage. As an exception, the crack growth in the tertiary crack growth stage gradually changed from intergranular to mixed model and finally transgranular fracture. In contrast, in creep-fatigue regime, the crack growth behaviour was greatly reliant on the dwell time. For short duration period, the crack mainly propagated in a transgranular manner. But as the dwell time increased to greater than 600s, the creep intergranular fracture dominated once again. Furthermore, the grain size gradient had little influence on the crack growth model and only affected the fracture life in creep and creep-fatigue regimes.

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Section: Introductionmentioning

confidence: 99%

Predicting failure modes in creep and creep-fatigue crack growth using a random grain/grain boundary idealised microstructure meshing system

Zhao

Nikbin

2017

Materials Science and Engineering: A

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“…As has been proved experimentally in [19,23], the cyclic material properties of steel alloys can be altered significantly due to large deformation. Currently the challenges lie in manufacturing proper test specimens with comparable degree of deformation as the skew rolled component that has been discussed in the paper at hand.…”

Section: Discussionmentioning

confidence: 84%

Consideration of cyclic hardening and residual stresses in fatigue life calculations with the local strain approach

et al. 2021

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The local strain approach (LSA) is an established concept to calculate the fatigue life of mechanical components for failure criterion crack initiation in several fields of engineering. In an elastic static finite element simulation, the critical stress state is detected and forms the basis for an elastic–plastic fatigue calculation with the LSA in a post-processing routine. This paper introduces extension options of the LSA to consider the influences of forming processes on the fatigue life of components.

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“…46,47 The damage accumulation model is often made dependent only on inelastic hysteresis strain energy per cycle. [48][49][50][51] The well-known Smith-Watson-Topper (SWT) model [52][53][54][55] is widely used also, where the damage state variable is a combination of the total strain amplitude and maximum stresses in the loading cycle. In continuous damage mechanics, the damage growth process is often dependent on plastic deformation.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations and damage growth modeling of EN‐AW 2024 aluminum alloy under LCF loading accounting creep pre‐deformation

Tomczyk

Seweryn

2022

Fatigue Fract Eng Mat Struct

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This article presents the results of experimental tests of creep rupture and of low-cycle fatigue (LCF) of EN-AW 2024 aluminum alloy devoid of damage and having preliminary damage. The preliminary damage was dealt in the process of creep at elevated temperature 100 C, 200 C, and 300 C until achievement of two different strain values at each temperature. Samples with preliminary damage were subjected to fatigue tests at room temperature. Based on the results of experimental tests, a simple damage accumulation model was proposed for creep at different temperatures. In this model, growth of the damagestate variable was made dependent on the current value of axial stress and on growth of plastic strain. This model was also adapted for description of damage accumulation in the process of LCF for both as-received material and material with creep pre-deformation. In both cases, that is, creep and LCF, the model's parameters were determined and it was experimentally verified.

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Analysis of different fatigue damage accumulation theories and damage parameters based on experiments with the steel HC340LA

Cited by 3 publications

References 27 publications

Predicting failure modes in creep and creep-fatigue crack growth using a random grain/grain boundary idealised microstructure meshing system

Predicting failure modes in creep and creep-fatigue crack growth using a random grain/grain boundary idealised microstructure meshing system

Consideration of cyclic hardening and residual stresses in fatigue life calculations with the local strain approach

Experimental investigations and damage growth modeling of EN‐AW 2024 aluminum alloy under LCF loading accounting creep pre‐deformation

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