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Effect of Blasting Stress Wave on Dynamic Crack Propagation

Huizhen Liu1,2, Duanying Wan3, Meng Wang3, Zheming Zhu3, Liyun Yang2,*

1 Key Laboratory for Old Bridge Detection & Reinforcement Technology of the Ministry of Transportation, Beijing, 100088, China
2 School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing, 100083, China
3 MOE Key Laboratory of Deep Underground Science and Engineering, School of Architecture and Environment, Sichuan University, Chengdu, 610065, China

* Corresponding Author: Liyun Yang. Email: email

Computer Modeling in Engineering & Sciences 2024, 138(1), 349-368. https://doi.org/10.32604/cmes.2023.028197

Abstract

Stress waves affect the stress field at the crack tip and dominate the dynamic crack propagation. Therefore, evaluating the influence of blasting stress waves on the crack propagation behavior and the mechanical characteristics of crack propagation is of great significance for engineering blasting. In this study, ANSYS/LS-DYNA was used for blasting numerical simulation, in which the propagation characteristics of blasting stress waves and stress field distribution at the crack tip were closely observed. Moreover, ABAQUS was applied for simulating the crack propagation path and calculating dynamic stress intensity factors (DSIFs). The universal function was calculated by the fractal method. The results show that: the compressive wave causes the crack to close and the reflected tensile wave drives the crack to initiate and propagate, and failure mode is mainly tensile failure. The crack propagation velocity varies with time, which increases at first and then decreases, and the crack arrest occurs due to the attenuation of stress waves and dissipation of the blasting energy. In addition, crack arrest toughness is smaller than the crack initiation toughness, applied pressure waveforms (such as the peak pressure, duration, waveforms, wavelengths and loading rates) have a great influence on DSIFs. It is conducive to our deep understanding or the study of blasting stress waves dominated fracture, suggesting a broad reference for the further development of rock blasting in engineering practice.

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Cite This Article

APA Style
Liu, H., Wan, D., Wang, M., Zhu, Z., Yang, L. (2024). Effect of blasting stress wave on dynamic crack propagation. Computer Modeling in Engineering & Sciences, 138(1), 349-368. https://doi.org/10.32604/cmes.2023.028197
Vancouver Style
Liu H, Wan D, Wang M, Zhu Z, Yang L. Effect of blasting stress wave on dynamic crack propagation. Comput Model Eng Sci. 2024;138(1):349-368 https://doi.org/10.32604/cmes.2023.028197
IEEE Style
H. Liu, D. Wan, M. Wang, Z. Zhu, and L. Yang "Effect of Blasting Stress Wave on Dynamic Crack Propagation," Comput. Model. Eng. Sci., vol. 138, no. 1, pp. 349-368. 2024. https://doi.org/10.32604/cmes.2023.028197



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