Evaluation and comparison of several multiaxial fatigue criteria

Wang, Yingyu; Yao, Weixing

doi:10.1016/s0142-1123(03)00110-5

Cited by 170 publications

(82 citation statements)

References 30 publications

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“…General reviews of fatigue life prediction methods are presented in references (Garud 1981, Brown and Miller 1973, You and Lee 1996, Hen et al 2002, Wang and Yao 2004. The most recent review papers by Hen et al (2002) and Wang and Yao (2004) have concluded that the energy-critical plane damage model by Varvani (2000) very successfully correlated fatigue life results as compared with other damage criteria developed to the date. The energycritical plane approach is defined on specific planes and accounts for states of stress through combinations of the normal and shear strain and stress ranges.…”

Section: Damage Assessment and Methodologymentioning

confidence: 99%

Silicon MEMS components: a fatigue life assessment approach

Varvani‐Farahani

2005

Microsystem Technologies

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A fatigue damage approach for life assessment of silicon micro-components is proposed. The components of this model have been developed based on the physics of crack initiation and damage progress on the most damaging planes. This approach may be of great importance in durability assessment of silicon-based MEMS components while the complexity of testing equipment, micro-sized specimen preparation, and the high expenses associated with the fatigue tests of micro-components are of great concern. Fatigue damage accumulation of silicon microcomponents is accompanied with the formation of inclined micro-critical planes of {111} on the fracture surface as a means of dissipating energy during fatigue damage progress, which coincides with the theory of fatigue damage accumulation in Varvani's approach (2000). Predicted fatigue lives based on the damage model were found in good agreement with experimental fatigue life data of these components reported in the literature. Correlations are within a factor of ±2.5 for short and long lives, which are within the limits of acceptance.

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Section: Damage Assessment and Methodologymentioning

confidence: 99%

Silicon MEMS components: a fatigue life assessment approach

Varvani‐Farahani

2005

Microsystem Technologies

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“…They may be written in strain alone or some product of stress and strain. When principal directions of strain correspond to axes of coordinates employed, the most common equivalent strain models are [3][4][5][6][7][8]: Maximum normal strain theory 1:…”

Section: Multiaxial Fatigue Life Evaluation Modelsmentioning

confidence: 99%

“…It is difficult for engineers to analyze histories of stress and strain. Therefore, development of suitable models for the design of actual components where variation of principal directions of stress and strain vs. time is considered 3-dimensionally is required [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…There are a lot of structural components that are subjected to non-proportional multiaxial loading, but the verification of shortened fatigue life has not been carried out mostly. Therefore, in order to have a guarantee for safety and soundness of structural components, an appropriate understanding and damage evaluation under non-proportional multiaxial loading are strongly urged [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation and visualization of multiaxial fatigue behavior under random non-proportional loading condition

Morishita¹,

Ogawa²,

Itoh³

2017

Frattura Ed Integrità Strutturale

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ABSTRACT. In cyclic multiaxial stress/strain condition under nonproportional loading in which principal direction of stress/strain are changed in a cycle, it becomes difficult to analyze stress/strain ranges because of complexity of multiaxial stress/strain states depending on time in cycles. In order to evaluate stress/strain simply and suitably under non-proportional loading, Itoh and Sakane have proposed a method called as IS-method and a strain parameter for life evaluation under non-proportional loading  NP . In the method, 6-components of stress/strain are converted to an equivalent stress/strain indicating the amplitude and the direction of principal stress/strain as a function of time as well as an intensity of loading nonproportionality f NP . Based on IS-method, the authors also have developed a tool which enables to analyze multiaxial stress/strain condition with the nonproportionality of loading history and evaluate failure life under nonproportional multiaxial loading. The tool indicates the analyzed results on monitor and users can understand visually not only variation of the stress/strain conditions but also non-proportionality during the cycle, which helps the design of material strength.

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“…Furthermore, spectral methods have been developed to assess multiaxial fatigue in the frequency domain, instead of the time domain [12]. However, still no consensus has been reached on an approach for the assessment of multiaxial fatigue in welded joints, whereby non-proportionality and variable amplitude loading can be accounted for correctly [13]. This study aims to identify the discrepancies resulting from the use of different multiaxial fatigue approaches for the fatigue analysis of welded joints in marine structures, considering proportionality and stress amplitude (ratio).…”

Section: Introductionmentioning

confidence: 99%

Comparative study of multiaxial fatigue methods applied to welded joints in marine structures

Lieshout¹,

Besten²,

Kaminski³

2016

Frattura Ed Integrità Strutturale

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ABSTRACT. Marine structures are particularly prone to action of waves, winds and currents with stochastically varying composition, intensities and directions. Therefore, resultant stresses may cause multiaxial fatigue in specific welded structural details. For the assessment of multiaxial fatigue in welded joints, a wide variety of methods have been suggested. However, there is still no consensus on a method which can correctly account for non-proportional and variable amplitude loading. This paper beholds a comparative study of multiaxial fatigue methods applicable for design of marine structures. For the purpose of comparison several load cases were defined including non-proportional and variable amplitude loadings with different normal and shear stress amplitude ratios. Three types of methods are compared: those described by three different codes (i.e. Eurocode 3, IIW and DNV-GL), those described by three different multiaxial fatigue approaches from literature (i.e. Modified Carpinteri-Spagnoli Criterion, Modified Wohler Curve Method and Effective Equivalent Stress Hypothesis) and an approach based on Path-Dependent-Maximum-Range multiaxial cycle counting. From this study it has been concluded that non-proportional variable amplitude loading has a significant negative impact on the fatigue lifetime estimates, and that further research and experimental testing are essential to come to a consensus.

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Evaluation and comparison of several multiaxial fatigue criteria

Cited by 170 publications

References 30 publications

Silicon MEMS components: a fatigue life assessment approach

Silicon MEMS components: a fatigue life assessment approach

Evaluation and visualization of multiaxial fatigue behavior under random non-proportional loading condition

Comparative study of multiaxial fatigue methods applied to welded joints in marine structures

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