A single edge notch specimen for fatigue, creep-fatigue and thermo-mechanical fatigue crack growth testing

Narasimhachary, Santosh B.; Bhachu, Kanwardeep S.; Shinde, Sachin; Gravett, Phillip W.; Newman, James C.

doi:10.1016/j.engfracmech.2017.08.011

Cited by 17 publications

(4 citation statements)

References 19 publications

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“…The loading section and constraint section were located at the critical interface of the clamping part when clamping the specimen to restore the actual test conditions as much as possible. 37 In addition, it should be noted that the traditional SEN specimen should be connected through the pin-hole structure to completely eliminate the force in the torsion direction. To facilitate cooperation with the existing MTS high-temperature clamp and improve the temperature cycle efficiency of the specimen, the specimen was designed as a round rod and could not be used for pin-hole connection.…”

Section: Modified Compliance Methodsmentioning

confidence: 99%

“…Mesh near crack tip was most fine, and the minimum size was 0.025 mm. The loading section and constraint section were located at the critical interface of the clamping part when clamping the specimen to restore the actual test conditions as much as possible 37 . In addition, it should be noted that the traditional SEN specimen should be connected through the pin‐hole structure to completely eliminate the force in the torsion direction.…”

Section: Testing Proceduresmentioning

confidence: 99%

See 1 more Smart Citation

Thermomechanical and isothermal fatigue crack propagation testing method for 316LN austenitic stainless steel

Zheng

Zhao

et al. 2022

Fatigue Fract Eng Mat Struct

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Investigating fatigue crack growth behavior of materials is crucial to the life design and safety evaluation of engineering structures. During the practical service condition, the temperature keeps changing, which cannot be studied by the traditional fatigue crack growth test method at constant temperature. In this study, we focus on constructing a new thermomechanical fatigue (TMF) crack propagation testing method, developing a thermal deformation compensation method, and proposing an equivalent compliance method suitable for variable temperature conditions based on ASTM E647 standard to measure the crack length. Furthermore, the load-and strain-controlled TMF tests under different phase angles are carried out to prove the validity of the new method.

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Section: Modified Compliance Methodsmentioning

confidence: 99%

Section: Testing Proceduresmentioning

confidence: 99%

Thermomechanical and isothermal fatigue crack propagation testing method for 316LN austenitic stainless steel

Zheng

Zhao

et al. 2022

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

“…The result showed that the time-dependent creep damage mechanisms control the cracking path. Narashimhachary et al [109] found that there is a difference in the stress intensity solutions for a rectangular edge-cracked plate emphasizing the importance of using correct boundary conditions. Bouvard et al [110] formulated a phenomenological model to predict the crack growth in crystal super alloys at elevated temperatures.…”

Section: Challenge-3: Intricacy In Fatigue Crack Propagationmentioning

confidence: 99%

Current challenges in modelling vibrational fatigue and fracture of structures: a review

Kamei

Khan

2021

J Braz. Soc. Mech. Sci. Eng.

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Fatigue damage is a concern in the engineering applications particularly for metal structures. The design phase of a structure considers factors that can prevent or delay the fatigue and fracture failures and increase its working life. This paper compiled some of the past efforts to share the modelling challenges. It provides an overview on the existing research complexities in the area of fatigue and fracture modelling. This paper reviews the previous research work under five prominent challenges: assessing fatigue damage accurately under the vibration-based loads, complications in fatigue and fracture life estimation, intricacy in fatigue crack propagation, quantification of cracks and stochastic response of structure under thermal environment. In the conclusion, the authors have suggested new directions of work that still require comprehensive research efforts to bridge the existing gap in the current academic domain due to the highlighted challenges.

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“…Damage tolerance refers to the ability of a structure to resist damage caused by defects, cracks or other damages during specified unrepaired service life. In short, it refers to the initial defect in aircraft structure and the degree of defect development in use [16]. Therefore, the damage tolerance design concept involves acknowledging whether structures have initial defects before use.…”

Section: Damage Tolerance and Stress Intensity Factormentioning

confidence: 99%

Integral Aircraft Wing Panels with Penetration Cracks: The Influence of Structural Parameters on the Stress Intensity Factor

Gong

et al. 2020

Applied Sciences

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The finite element model of integral wing panels with central penetration cracks under bending load was established, and the crack propagation process of the aircraft panel was simulated. The stress intensity factor (SIF) of the crack tip during crack propagation under varying conditions of crack length and panel structural parameters was determined. The effects of the panel structure parameters and crack size on the crack tip SIF were obtained. The regression analysis of the finite simulation element results has been performed and a regression model of SIF at the crack tip of the integral panel has been established, the determination coefficient of the regression model is 0.955.

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A single edge notch specimen for fatigue, creep-fatigue and thermo-mechanical fatigue crack growth testing

Cited by 17 publications

References 19 publications

Thermomechanical and isothermal fatigue crack propagation testing method for 316LN austenitic stainless steel

Thermomechanical and isothermal fatigue crack propagation testing method for 316LN austenitic stainless steel

Current challenges in modelling vibrational fatigue and fracture of structures: a review

Integral Aircraft Wing Panels with Penetration Cracks: The Influence of Structural Parameters on the Stress Intensity Factor

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