Study of TBM cutterhead fatigue damage mechanisms based on a segmented comprehensive failure criterion

Sun, Wei; Ling, Jingxiu; Huo, Junzhou; Guo, Li; Song, Xueguan

doi:10.1016/j.engfailanal.2015.08.041

Cited by 20 publications

(12 citation statements)

References 20 publications

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“…In the fatigue crack-growth calculation model, Liu et al ward the small-time scale prediction model based on continuous crack-grow tained better prediction results for aluminum alloy and other materials. Huo e dicted the influence of thick plate on crack-growth behavior, based on th small-time scale model, and obtained the expression of constraint factor func the complex structure of a cutterhead and changeable geological environment generated by a cutterhead are mostly composite cracks [1,3,6]. The stress inte The cutterhead is the core component of a shield machine.…”

Section: Introductionmentioning

confidence: 99%

“…The results lay a foundation for predicting the multi-crack propagation life of a cutterhead. Ling & Sun et al [1,3] established the probability density function of the load distribution of a cutterhead using statistical method, and then calculated it using a rain flow counting method, and compiled the eight-level load spectrum. In the fatigue crack-growth calculation model, Liu et al [4] put forward the small-time scale prediction model based on continuous crack-growth, and obtained better prediction results for aluminum alloy and other materials.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Failure Analysis and Fatigue Life Prediction of Shield Machine Cutterhead

Zhang

Liu

et al. 2021

Materials

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This paper presents numerical failure analysis on cracking of shield machine cutterhead structure during a metro-tunnel construction. The stress intensity factors (SIFs) of surface cracks with different shapes and location angles were analyzed by a finite element simulation method based on linear elastic fracture mechanics (LEFM) theory. The ratios of variation in stress intensity factors of cracks with different shapes were analyzed. The maximum allowable crack depth of the cutterhead panel is 50.23 mm by dynamic stress calculation, and the damage tolerance criterion of the cutterhead panel was proposed. The influence of the Paris model parameter values was analyzed based on mathematical methods. It is proven that the location of the cutterhead cracking angle is mainly determined by the mixed-mode SIF. In practice, the crack section basically expanded into the semi-elliptical shape. The cutterhead structure may directly enter the stage of crack propagation due to welding defects during tunneling. The research results provide a theoretical basis and important reference for crack detection in the key parts of the cutterhead, as well as maintenance cycle determination and life prediction of the cutterhead mileage, both of which have important engineering value.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Failure Analysis and Fatigue Life Prediction of Shield Machine Cutterhead

Zhang

Liu

et al. 2021

Materials

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“…J.J. Schubbe [19] and others performed experimental studies of the effect of plate thickness on the crack growth rate of 7050-T7451 aluminum alloy thick plates. Huo et al [20] and Sun et al [21], [22] modified a small-timescale crackgrowth model to predict the crack-growth lifetime of a Tunnel Boring Machine(TBM) cutterhead based on the plane stress/strain transition condition. Yu et al [23] studied the plastic closure phenomenon in crack propagation.…”

Section: Introductionmentioning

confidence: 99%

A Time-Integral Crack Propagation Model Considering Thickness Effect

et al. 2019

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The crack propagation mechanism of thick plates is difficult to describe accurately, and thus, it is difficult to predict the lifetimes of thick plate structural cracks in extreme construction environments. In this paper, a theoretical model of the time-integrated crack propagation that accounts for the thickness effect is established. The constraint factor is introduced to characterize the thickness effect of crack propagation, and the constraint factor formula was obtained by fitting the experimental results. The results of the fatigue crack growth tests and the crack propagation theoretical predictions for Q345D specimens showed the time-integrated crack propagation model predicts the crack propagation more accurately in the initial stage and during the stable expansion stage of crack propagation. These results have guiding significance for the fatigue life prediction of equipment with thick plate structural features.INDEX TERMS Thick plate, crack propagation, crack closure, fatigue test, time integration method.

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“…Crack propagation reduces the strength of the whole cutterhead greatly; leads to the vibration intensification and the failure of the whole equipment, which seriously reduces the construction efficiency; and even threatens the life safety of the front-line constructors. 1 TBM cutterhead welded by several hundred thick plates inevitably has initial defects. This leads to the short crack initiation time, which indicates that the crack propagation life accounts for more than 90% of the whole cutterhead life.…”

Section: Introductionmentioning

confidence: 99%

“…JR Li et al 13 proposed the influential mechanism of specimen thickness on acoustic emission (AE) signal and AE source during fatigue crack propagation based on the thickness effect analysis, fatigue behavior studies, and AE investigations. W Sun et al 1,3 modified a small-timescale crack growth model to predict crack growth lifetime of a TBM cutter head based on the plane stress/strain transition condition. PS Yu and colleagues [14][15][16] used the constraint factor to characterize the thickness effect in penetration crack propagation and proposed a crack closure model considering the effect of thickness and stress ratio based on simulation and theoretical deduction.…”

Section: Introductionmentioning

confidence: 99%

Tunnel boring machine cutterhead crack propagation life prediction with time integration method

Li¹,

Zhang

Meng

et al. 2019

Advances in Mechanical Engineering

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Fatigue damage is one of the most common failure modes of large-scale engineering equipment, especially the full-face tunnel boring machine with characteristics of a thick plate structure bearing strong impact load. It is difficult to predict the location and propagation life of crack of cutterhead under strong impact load. Unseasonal maintenance of equipment caused by inaccurate prediction of life cycle of cutterhead seriously affects the construction efficiency of the equipment and the life safety of the operators. Determining the crack location of tunnel boring machine cutterhead structure under strong impact load and predicting the crack propagation life are difficult scientific problems. To solve them, first, the location of the stress concentration of the cutterhead is determined by using finite element analysis method of statics. Second, prediction model for crack propagation life of tunnel boring machine cutterhead characteristic substructure based on time integration is built. And the test of crack growth of cutterhead characteristic substructure is performed. The feasibility and accuracy of the prediction model are verified by contrasting crack prediction models and the results of the test. Finally, the life prediction of tunnel boring machine cutterhead of water diversion project in Northwest Liaoning Province is carried out by using crack propagation model based on time integration. Results show that the maximum error of theoretical prediction and experimental results of crack propagation is 16%. So the feasibility of crack propagation model based on time integration in predicting the crack growth of cutterhead is verified. It is predicted that the tunnel boring machine cutterhead panel can work normally for 5.9 km under the condition of ultimate load. Building the crack propagation model considering the influence of plate thickness and strong impact load has important research value for improving the working efficiency of engineering equipment, prolonging service time, and improving the working safety.

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Study of TBM cutterhead fatigue damage mechanisms based on a segmented comprehensive failure criterion

Cited by 20 publications

References 20 publications

Numerical Failure Analysis and Fatigue Life Prediction of Shield Machine Cutterhead

Numerical Failure Analysis and Fatigue Life Prediction of Shield Machine Cutterhead

A Time-Integral Crack Propagation Model Considering Thickness Effect

Tunnel boring machine cutterhead crack propagation life prediction with time integration method

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