Correlation and prediction of fatigue crack growth for different R-ratios using Kmax and ΔK+ parameters

Dinda, Sudip; Kujawski, Daniel

doi:10.1016/j.engfracmech.2003.06.001

Cited by 176 publications

(75 citation statements)

References 13 publications

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“…1Àa (Kujawski, 2001a;Dinda and Kujawski, 2004). This result indicates that for the crack growth rate at the stress intensity factor range close to and lower than DK th the function f(R) may be written as the following form (2) is capable of describing the effect of R on the crack growth rate close to and below the value of DK th .…”

Section: Dk(1 à R)mentioning

confidence: 94%

“…Later, Kujawski (2001a) proposed a fatigue crack driving force parameter K ⁄ = (K max ) a (DK + ) 1Àa for correlating long and short crack growth rate incorporating the effect of R, in which DK + denoted the positive part of DK, and a was a parameter depending on the related material, temperature and environment. The comparison of experimental data for ten different types of materials indicated that the parameter K ⁄ was equally effective or better than DK eff in correlating and predicting the effect of R on crack growth rate (Dinda and Kujawski, 2004). In addition, Noroozi et al (2005) proposed a two parameter driving force model based on the analysis of elastic-plastic stress-strain history at crack tip, which showed that the crack growth rate was controlled by a two parameter driving force K p max ;tot DK 1Àp tot , where the resultant maximum stress intensity factor K max,tot and the resultant stress intensity range DK tot contained the effect of residual stress.…”

Section: Dk]mentioning

confidence: 99%

See 1 more Smart Citation

Effects of stress ratio on crack growth rate and fatigue strength for high cycle and very-high-cycle fatigue of metallic materials

Sun¹,

Lei²,

Hong³

2014

Mechanics of Materials

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Section: Dk(1 à R)mentioning

confidence: 94%

Section: Dk]mentioning

confidence: 99%

Effects of stress ratio on crack growth rate and fatigue strength for high cycle and very-high-cycle fatigue of metallic materials

Sun¹,

Lei²,

Hong³

2014

Mechanics of Materials

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“…The effect of stress ratio on FCGR has been investigated by other researchers (e.g., [21][22][23][24][25]) and different driving forces have been identified for FCGR. As stated earlier, the study on FCGR of AM60B in our research group was initiated by Nur Hossain and Taheri [17].…”

Section: Fatigue Crack Growth In Am60bmentioning

confidence: 99%

Microstructure and Fatigue Characteristic of AM60B Magnesium Alloy

Taheri‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬

You

Mehrzadi

2012

Metals

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This paper summarizes and reviews the findings of our research on AM60B magnesium alloy conducted in past 8 years. It essentially covers three categories: microstructural study, environmental effect, and fatigue crack growth rate of AM60B. The experimental and numerical studies on the influence of casting defects on this particular material's properties are reviewed in the first part. It has been shown that the non-uniform solidification of the casting results in variations of the microstructure in different layers (skin and core) of the alloy which affects the mechanical properties in those regions. Moreover, the influence of microstructure on fatigue crack initiation and propagation response of the alloy is presented. The influence of several casting defects on the failure mechanism of the material are also numerically analyzed and discussed. The influence of elevated and cold temperatures on the fatigue response of the alloy is reviewed in the second part. Our findings show that the temperature does not have a significant effect on the number of cycles to failure. However, but at some stress level, this effect cannot be dismissed. The fatigue crack growth rate (FCGR) response of the alloy at a wide range of stress ratios is also investigated in the last part. The FCGR of the alloy showed a noticeable dependency on the stress ratio. A model is proposed for estimating the FCGR of the alloy, which could provide a good prediction of alloy's FCGR over a wide range of negative and positive stress ratios. The integrity of the new model is also compared against other models. Finally, the influence of compressive loading on fatigue life of the specimens under constant and random amplitude cyclic loading is investigated experimentally. OPEN ACCESSMetals 2012, 2 412

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“…Dinda and Kujawski [28] used a fatigue crack driving force parameter similar to Walker's approach, difference being that it is calculated solely using the positive part of the range of applied stress intensity factor, AK + , and the corresponding maximum value of SIF, K max .…”

Section: Concepts For Correlation Of R-ratio Effectsmentioning

confidence: 99%

“…Using this approach the R-ratio effects on fatigue crack growth were successfully correlated for a number of materials [28].…”

Section: Ak^ = {K Mzx Y(ak+lmentioning

confidence: 99%

Correlation and prediction of fatigue crack growth for different R-ratios using Kmax and ΔK+ parameters

Cited by 176 publications

References 13 publications

Effects of stress ratio on crack growth rate and fatigue strength for high cycle and very-high-cycle fatigue of metallic materials

Effects of stress ratio on crack growth rate and fatigue strength for high cycle and very-high-cycle fatigue of metallic materials

Microstructure and Fatigue Characteristic of AM60B Magnesium Alloy

Experimental and Theoretical Analyses of the Load Sequence Effects on Fatigue Crack Growth Resistance

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