A microstructurally-based internal length for strain localization problems in dynamics

Baudin, François; Keita, Oumar

doi:10.1016/j.euromechsol.2015.05.012

Cited by 4 publications

(2 citation statements)

References 50 publications

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“…In [18,19],the dynamic Eq.s of the damage model were established. Based on the asymptotic homogenization schemes and damage evolution from energy release rate analysis the following set of dynamic Eq.s was found The momentum balance Eq.…”

Section: Dynamic Damage Modelmentioning

confidence: 99%

Numerical Evaluation of Vibration Induced by Explosive Blasting in the Bauxite Mines of Sangarédi, Guinea

Keita,

Camara

2024

PSIJ

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During rocks blasting by explosives in mines and quarries, Vibration phenomena appear in the surrounding environment, often causing significant damage to neighboring structures such as: buildings, bridges, tunnels and dams. This is why mining companies using the technique of the explosion are often faced with constraints of limiting the vibration level in order to minimize or eliminate potential damage to neighboring structures or reduce neighbor complaints. This paper presents a new numerical prediction model for vibration level induced by explosive blasting in the Bauxite mines of Sangarédi, Guinea. The dynamic damage law is associated with vibration phenomena analyses to determine numerical value of the particle velocities of different points located at different distances from the explosion hole for the explosion of a single charge hole, in order to compare to the vibration level required by the specifications of the Guinea mining company, which authorizes a vibration level of 10 mm/s in an inhabited area. The prediction of the vibration level gives particle velocities of 11m/s at a distance of 10 m from the explosion hole. Based on the results of the model, one could estimate that this required vibration level would be reached at a distance of 80 m from the blast hole.

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Section: Dynamic Damage Modelmentioning

confidence: 99%

Numerical Evaluation of Vibration Induced by Explosive Blasting in the Bauxite Mines of Sangarédi, Guinea

Keita,

Camara

2024

PSIJ

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“…strain localisation. Once strain localisation happens, large strains can accumulate inside a narrow band and eventually lead to fracture (Ortiz et al, 1987;Oliver, 1996;François and Keita, 2015;Tvergaard, 2015). Originated from the traditional FEM methods, the XFEM method is based on the partition of unity method that enriches the FEM shape functions to capture the discontinuities in materials (Belytschko and Black, 1999;Malekan et al, 2018;Jansari et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

A generic computational model for three-dimensional fracture and fragmentation problems of quasi-brittle materials

Guo

Xiang

Latham

et al. 2020

European Journal of Mechanics - A/Solids

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Fracture and fragmentation in three dimensions are of great importance to understand the mechanical behaviour of quasi-brittle materials in failure stress states. In this paper, a generic computational model has been developed in an in-house C/C++ code using the combined finite-discrete element method, which is capable of modelling the entire three-dimensional fracturing process, including pre-peak hardening deformation, post-peak strain softening,

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A Fatigue Damage Propagation Model Based on Locally Periodic Micro-crack Growth

Keita,

Velay,

Lacoste

et al. 2024

Advances in Science, Technology &Amp; Innovation

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A microstructurally-based internal length for strain localization problems in dynamics

Cited by 4 publications

References 50 publications

Numerical Evaluation of Vibration Induced by Explosive Blasting in the Bauxite Mines of Sangarédi, Guinea

Numerical Evaluation of Vibration Induced by Explosive Blasting in the Bauxite Mines of Sangarédi, Guinea

A generic computational model for three-dimensional fracture and fragmentation problems of quasi-brittle materials

A Fatigue Damage Propagation Model Based on Locally Periodic Micro-crack Growth

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