Fracture mechanics models for short crack growth estimation and fatigue strength assessment

Chapetti, Mirco Daniel

doi:10.1590/1517-7076-rmat-2022-0030

Cited by 6 publications

(7 citation statements)

References 41 publications

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“…Table 6 discuss the ANOVA test was used to see if the load bearing capacity and deformation patterns of the standard beams and the reinforced beams with CFRP and GFRP laminates differed significantly from one another. The ANOVA test revealed that the improvement in load carrying capacity and the reduction in deflection were statistically significant (p < 0.05) for both carbon and glass FRP laminated beams [25,26]. The F-value of 7.47 indicated that the variation between the groups (CFRP, GFRP) was significant compared to the variation within the groups.…”

Section: Resultsmentioning

confidence: 96%

Behavior of reinforced concrete beam with CFRP and GFRP laminates

Kaliyappan,

Pakkirisamy

2023

Matéria (Rio J.)

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The main aim is to examine the behavior of laminated carbon fiber and glass fiber reinforced polymer (CFRP) and (GFRP) reinforced composite (RC) beams. The physical characteristics of these laminates, such as tensile strength, modulus of elasticity and strain capacity are examined. The capacity of load bearing, deflection, and cracking behavior of RCC beam specimens along with various types and numbers of laminates will be analyzed and compared. The results will provide insight into the outcome of using different kinds of laminates over RCC beams and identify the optimal configuration for their reinforcement. The findings of this research paper will have significant implications for the construction industry, particularly for rehabilitation and repairing of old buildings and other structures. The use of CFRP and GFRP laminates as a reinforcement material can extend the life of RCC beams, reduce the need for costly repairs and replacements, and increase the safety and sustainability of infrastructure. The paper will conclude with recommendations for the optimal use of carbon fiber and glass fiber reinforced polymer laminates in RCC beam reinforcement, including the selection of appropriate materials and design criteria for their successful application.

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Section: Resultsmentioning

confidence: 96%

Behavior of reinforced concrete beam with CFRP and GFRP laminates

Kaliyappan,

Pakkirisamy

2023

Matéria (Rio J.)

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“…The Chapetti model [8] and the Murakami-Endo model [7] are used here to analyze the short crack regime. Refer to references [11,44] for a detailed analysis of this range of short cracks and a discussion of hypotheses regarding various prediction models for threshold curves and their differences.…”

Section: Fatigue Crack Propagation Threshold Curve: ∆K Th Vs a Estima...mentioning

confidence: 99%

“…However, the comparison and potential advantages of different models will not be discussed in detail in this context. For a more comprehensive understanding of the topic, further insights can be gained by referring to references [11,44].…”

Section: The Intrinsic Fatigue Limitmentioning

confidence: 99%

Intrinsic Fatigue Limit and the Minimum Fatigue Crack Growth Threshold

Chapetti,

Gubeljak,

Kozak

2023

Materials

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In the field of long-life fatigue, predicting fatigue lives and limits for mechanical components is crucial for ensuring reliability and safety. Fracture mechanics tools have enabled the estimation of fatigue lives for components with small cracks or defects. However, when dealing with defects larger than the microstructural characteristic size, estimating the fatigue resistance of a material requires determining the cyclic resistance curve for the defect-free matrix, which depends on knowledge of the material’s intrinsic fatigue limit. This study focuses on the experimental evidence regarding the intrinsic fatigue limit and its correlation with naturally nucleated non-propagating cracks. Fracture mechanics models for small crack propagation are introduced, and their disparities and limitations are analyzed. The concept of intrinsic fatigue limit is then introduced and applied to reanalyze a recent publication. Methods for estimating the intrinsic fatigue limit are explored and applied to experimental results reported in the literature. The need to clarify and accurately predict the intrinsic fatigue limit is highlighted in alloys where the processing generates defects larger than the microstructural size of the matrix, as often observed in materials and components produced using additive manufacturing.

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“…Besides, Sheridan used Paris 15 , Donahue's model 16 , and NASGRO equation 17,18 to address the same issue in regards to the commercial Inconel 718 19,20 . It is worth mentioning Chapetti's work that aimed to extend EH's to the short-cracks regime while identifying EH's parameters considering crack closure effects as well 21,22 . This approach has recently found application in the context of additive manufacturing 23,24 .…”

Section: Introductionmentioning

confidence: 99%

B-FADE: Bayesian-FAtigue moDel Estimator in Python and its Application to the Probabilistic Estimation of El Haddad Curves

Tognan,

Salvati

2024

Preprint

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Accurate calibration of semi-empirical fatigue models against experimental evidence is a critical step for achieving reliable predictions. Amongst many semi-empirical fatigue models, El Haddad’s (EH) curve is widely exploited to characterise the fatigue endurance limit of defect-laden and cracked metallic alloys. A few deterministic computational models exist in this respect, however, they lack a robust probabilistic perspective and their implementation code is not publicly accessible. The authors of the present work have recently exploited Maximum a Posteriori (MAP) to robustly and probabilistically estimate EH's curves, even in case of data scarcity or incomplete datasets, combining experimental evidence and prior knowledge taken from literature. Whilst the implementation scheme was published, the associated code was not made available. Hereby, the authors present B-FADE, a flexible open-source Python package, aimed at releasing the implementation of the MAP approach with improvements, as well as several pre- and post-processing utilities to facilitate its deployment. The package is conferred with a sufficient level of abstraction, thus turning out to be easily extensible to future implementation of other relevant fatigue models.

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Fracture mechanics models for short crack growth estimation and fatigue strength assessment

Cited by 6 publications

References 41 publications

Behavior of reinforced concrete beam with CFRP and GFRP laminates

Behavior of reinforced concrete beam with CFRP and GFRP laminates

Intrinsic Fatigue Limit and the Minimum Fatigue Crack Growth Threshold

B-FADE: Bayesian-FAtigue moDel Estimator in Python and its Application to the Probabilistic Estimation of El Haddad Curves

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