Improvements of the Crack Extension Algorithm Based on the Maximum Energy Release Rate Criterion

Zhu, Youli

doi:10.3901/jme.2016.10.091

Cited by 5 publications

(2 citation statements)

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“…It uses an implicit algorithm and is more commonly used in practical problems. Research has shown that there is very little difference in the calculation of these two criteria [21], and in this paper, the MTS criterion is used for the calculation.…”

Section: Crack Kinking Anglementioning

confidence: 99%

Elasto-Plastic Fracture Mechanics Analysis of the Effect of Shot Peening on 300M Steel

Hou

Cai²,

Zhu³

et al. 2021

Materials

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A modified J-integral calculation method is adopted to fix the problem of the quantitative evaluation of the crack propagation of shot-peened structures. Considering the residual stress, residual strain, and residual strain energy, the effect of shot peening on the J-integral parameters of semi-elliptic surface crack fronts is quantitatively calculated and a method is provided for the performance evaluation of the shot peening layer. First, the shot peening process is simulated, then the fatigue crack is generated by changing the constraint condition and a far-field load is applied to calculate the J-integral parameters, crack propagation rate, and crack kinking angle. The effects of different crack depths and shot velocities on the fracture parameters are analyzed. The results show that the reduction in the J-integral value after shot peening decreases with the increase in the crack depth when the shot velocity is a certain value, which indicates that shot peening is more beneficial for suppressing the fatigue crack propagation. When the crack depth is greater than the depth of the compressive stress layer, shot peening accelerates the crack propagation. The reduction in the J-integral value decreases with the increase in shot velocity when the crack depth is a certain value; therefore, increasing shot velocity is more beneficial for retarding fatigue crack propagation.

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Section: Crack Kinking Anglementioning

confidence: 99%

Elasto-Plastic Fracture Mechanics Analysis of the Effect of Shot Peening on 300M Steel

Hou

Cai²,

Zhu³

et al. 2021

Materials

Self Cite

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show abstract

“…The dynamic simulation of the linear feed and the spiral feed cutting methods was carried out using ANSYS/LS-DYNA software (ANSYS, Inc., Ansys v.15.0, Pittsburgh, PA, USA) to obtain tensile stress perpendicular to the crack surface. The material model MAT_143 was selected to set up the bamboo model (Zhu et al 2016). The simulation used a bamboo specimen with a diameter of 100 mm and a wall thickness of 10 mm.…”

Section: Cutting Process Simulation Based On Ansys/ls-dynamentioning

confidence: 99%

Design of bamboo cutting mechanism based on crack propagation principle

Guan

Xiong

et al. 2021

BioRes

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Bamboo is mainly grown in hilly areas, and the harvesting of bamboo basically relies on labor. Moreover, the bamboo is prone to splitting problems during harvesting. To liberate labor and improve work efficiency, the crack propagation principle of bamboo was studied. Based on this study, a new cutting scheme using spiral feed was proposed. Additionally, a new bamboo cutting mechanism was designed. The new cutting mechanism, when installed on a harvesting vehicle, can automatically complete the cutting operation. The cutting mechanism is different from the traditional ones, and it uses four sets of saw blades for spiral feed cutting around the bamboo, which can reduce the splitting probability during the cutting process. Finally, a solid model of the cutting mechanism was built, and the basic movement process was simulated to verify the feasibility of the bamboo cutting mechanism.

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Analysis of deep crack formation and propagation in railway brake discs

Xie

Domblesky

et al. 2021

Engineering Failure Analysis

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Improvements of the Crack Extension Algorithm Based on the Maximum Energy Release Rate Criterion

Cited by 5 publications

References 0 publications

Elasto-Plastic Fracture Mechanics Analysis of the Effect of Shot Peening on 300M Steel

Elasto-Plastic Fracture Mechanics Analysis of the Effect of Shot Peening on 300M Steel

Design of bamboo cutting mechanism based on crack propagation principle

Analysis of deep crack formation and propagation in railway brake discs

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